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Delgado-Lima AH, Bouhaben J, Delgado-Losada ML. The efficacy of olfactory training in improving olfactory function: a meta-analysis. Eur Arch Otorhinolaryngol 2024; 281:5267-5284. [PMID: 38802578 PMCID: PMC11416427 DOI: 10.1007/s00405-024-08733-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Accepted: 05/12/2024] [Indexed: 05/29/2024]
Abstract
PURPOSE Study the efficacy of olfactory training in smell recovery. METHODS An extensive search was performed through different databases in order to find articles analyzing the efficacy of olfactory training as a treatment for olfactory dysfunction. Methodological quality of primary studies within the final sample was assessed following PRISMA guidelines. Standardized mean differences in pre-post olfactory training groups, and also in experimental-control and pre-follow up if possible, were computed by Hedges' g effect size statistic. Each effect size was weighted by its inverse variance. RESULTS Final sample was composed of 36 articles (45 pre-post effect sizes). Contrasts were performed separately for odor identification, odor discrimination, odor threshold and general olfactory function. Moderate to large and heterogeneous effect was obtained for olfactory function (g = 0.755, k = 45, SE = 0.093, CI 95% = [0.572, 0.937]), different moderators had a significant effects, such as, training duration, age and anosmia diagnosis. CONCLUSION Olfactory training was found to have a positive and significant effect on rehabilitating the olfactory function.
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Affiliation(s)
- Alice Helena Delgado-Lima
- Experimental Psychology, Cognitive Processes and Speech Therapy Department, Faculty of Psychology, Complutense University of Madrid, 28223, Pozuelo de Alarcón, Spain
| | - Jaime Bouhaben
- Experimental Psychology, Cognitive Processes and Speech Therapy Department, Faculty of Psychology, Complutense University of Madrid, 28223, Pozuelo de Alarcón, Spain
| | - María Luisa Delgado-Losada
- Experimental Psychology, Cognitive Processes and Speech Therapy Department, Faculty of Psychology, Complutense University of Madrid, 28223, Pozuelo de Alarcón, Spain.
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Lawrence AS, Veach J, Alapati R, Virgen CG, Wright R, Materia F, Villwock JA. Age-related differences in olfactory training outcomes: A prospective cohort study. Int Forum Allergy Rhinol 2024. [PMID: 39264324 DOI: 10.1002/alr.23451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Revised: 09/01/2024] [Accepted: 09/03/2024] [Indexed: 09/13/2024]
Abstract
INTRODUCTION While olfactory function decreases with age, it is unknown how age affects olfactory training (OT) efficacy. This study compared OT in two cohorts of subjects: aged ≤50 (younger cohort) and aged 51+ (older cohort) with olfactory dysfunction (OD) primarily from COVID-19 infection. METHODS Subjects with OD primarily secondary to COVID-19 infection were prospectively recruited and enrolled into an OT registry. Baseline data were collected and they were provided with a training kit and asked to complete OT at home twice daily for 6 months. Participants were asked to follow-up at 3 and 6 months during training for olfactory testing and quality-of-life surveys (Sino-Nasal Outcomes Test-22 [SNOT-22] and Questionnaire of Olfactory Disorders Negative Statements [QoD-NS]). RESULTS Fifty-six participants completed OT (younger cohort: n = 26, older cohort: n = 30). There were no significant differences between cohorts' Affordable Rapid Olfactory Measurement Array (AROMA), QoD-NS, or SNOT-22 scores at any time point. Both cohorts showed significant AROMA score improvement of more than 16 points from baseline to 3 months (younger cohort: p = 0.001; older cohort: p = 0.008). The younger cohort had significant improvements in QoD-NS (p = 0.008) and SNOT-22 (p = 0.042) between baseline and 3 months while the older cohort improved from 3 to 6 months (QoD-NS: p = 0.027, SNOT-22: p = 0.049). CONCLUSION Both cohorts demonstrated similar significant improvement in olfactory function after 3 months of OT. The timeline of subjective improvement was different between cohorts, with younger patients experiencing earlier improvement.
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Affiliation(s)
- Amelia S Lawrence
- Department of Otolaryngology-Head and Neck Surgery, University of Kansas Medical Center, Kansas City, Kansas, USA
| | - Jodi Veach
- University of Kansas School of Medicine, Kansas City, Kansas, USA
| | - Rahul Alapati
- Department of Otolaryngology-Head and Neck Surgery, University of Kansas Medical Center, Kansas City, Kansas, USA
| | - Celina G Virgen
- Department of Otolaryngology-Head and Neck Surgery, University of Kansas Medical Center, Kansas City, Kansas, USA
| | - Robert Wright
- Department of Otolaryngology-Head and Neck Surgery, University of Kansas Medical Center, Kansas City, Kansas, USA
| | - Frank Materia
- Department of Otolaryngology-Head and Neck Surgery, University of Kansas Medical Center, Kansas City, Kansas, USA
| | - Jennifer A Villwock
- Department of Otolaryngology-Head and Neck Surgery, University of Kansas Medical Center, Kansas City, Kansas, USA
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3
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Stark R, Dempsey H, Kleeman E, Sassi M, Osborne-Lawrence S, Sheybani-Deloui S, Austin-Muttitt K, Mullins J, Zigman JM, Davies JS, Andrews ZB. Hunger signalling in the olfactory bulb primes exploration, food-seeking and peripheral metabolism. Mol Metab 2024:102025. [PMID: 39236785 DOI: 10.1016/j.molmet.2024.102025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2024] [Revised: 08/15/2024] [Accepted: 09/02/2024] [Indexed: 09/07/2024] Open
Abstract
OBJECTIVE Although the metabolic state of an organism affects olfactory function, the precise mechanisms and their impact on behavior and metabolism remain unknown. Here, we assess whether ghrelin receptors (GHSRs) in the olfactory bulb (OB) increase olfactory function and influence foraging behaviors and metabolism. METHODS We performed a detailed behavioural and metabolic analysis in mice lacking GHSRs in the OB (OBGHSR deletion). We also analsyed OB scRNA-seq and spatial transcriptomic datasets to assess GHSR+ cells in the main and accessory olfactory bulbs, as well as the anterior olfactory nucleus. RESULTS OBGHSR deletion affected olfactory discrimination and habituation to both food and non-food odors. Anxiety-like and depression-like behaviors were significantly greater after OBGHSR deletion, whereas exploratory behavior was reduced, with the greatest effect under fasted conditions. OBGHSR deletion impacted feeding behavior as evidenced by altered bout number and duration, as well as buried food-seeking. OBGHSR deletion increased body weight and fat mass, spared fat utilisation on a chow diet and impaired glucose metabolism indicating metabolic dysfunction. Cross referenced analysis of OB scRNA-seq and spatial transcriptomic datasets revealed GHSR+ glutamate neurons in the main and accessory olfactory bulbs, as well as the anterior olfactory nucleus. Ablation of glutamate neurons in the OB reduced ghrelin-induced food finding and phenocopied results seen after OBGHSR deletion. CONCLUSIONS OBGHSRs help to maintain olfactory function, particularly during hunger, and facilitate behavioral adaptations that optimise food-seeking in anxiogenic environments, priming metabolic pathways in preparation for food consumption.
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Affiliation(s)
- Romana Stark
- Monash Biomedicine Discovery Institute and Department of Physiology, Monash University, Clayton, Victoria, Australia.
| | - Harry Dempsey
- Monash Biomedicine Discovery Institute and Department of Physiology, Monash University, Clayton, Victoria, Australia
| | - Elizabeth Kleeman
- The Florey Institute of Neuroscience and Mental Health, Mental Health Division, Parkville, Melbourne, Australia
| | - Martina Sassi
- Institute of Life Sciences, School of Medicine, Swansea University, Swansea, UK
| | - Sherri Osborne-Lawrence
- Center for Hypothalamic Research, Department of Internal Medicine, UT Southwestern Medical Center, Dallas, TX, USA; Division of Endocrinology, Department of Internal Medicine, UT Southwestern Medical Center, Dallas, TX, USA; Department of Psychiatry, UT Southwestern Medical Center, Dallas, TX, USA
| | - Sepideh Sheybani-Deloui
- Center for Hypothalamic Research, Department of Internal Medicine, UT Southwestern Medical Center, Dallas, TX, USA; Division of Endocrinology, Department of Internal Medicine, UT Southwestern Medical Center, Dallas, TX, USA; Department of Psychiatry, UT Southwestern Medical Center, Dallas, TX, USA
| | - Karl Austin-Muttitt
- Institute of Life Sciences, School of Medicine, Swansea University, Swansea, UK
| | - Jonathan Mullins
- Institute of Life Sciences, School of Medicine, Swansea University, Swansea, UK
| | - Jeffrey M Zigman
- Center for Hypothalamic Research, Department of Internal Medicine, UT Southwestern Medical Center, Dallas, TX, USA; Division of Endocrinology, Department of Internal Medicine, UT Southwestern Medical Center, Dallas, TX, USA; Department of Psychiatry, UT Southwestern Medical Center, Dallas, TX, USA
| | - Jeffrey S Davies
- Institute of Life Sciences, School of Medicine, Swansea University, Swansea, UK
| | - Zane B Andrews
- Monash Biomedicine Discovery Institute and Department of Physiology, Monash University, Clayton, Victoria, Australia.
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4
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Stankevice D, Fjaeldstad AW, Ovesen T. Smell and taste disorders in childhood: Diagnostic challenges and significant impacts on a child's well-being. Int J Pediatr Otorhinolaryngol 2024; 184:112081. [PMID: 39208514 DOI: 10.1016/j.ijporl.2024.112081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 08/07/2024] [Accepted: 08/22/2024] [Indexed: 09/04/2024]
Abstract
AIM Smell and taste are senses that contribute to a child's overall well-being. Disorders affecting these senses can impact a child's daily life from enjoying meals to detecting potential dangers through scent. The aim of this study is to describe patient characteristics and etiological causes of olfactory (OD) and/or gustatory disorders (GD) in children referred to a smell and taste clinic. Secondly, we aim to suggest a clinical work up. METHODS Retrospective study where data were collected from 57 children who were referred consecutively to the University Clinic for Flavour, Balance, and Sleep; Department of Otorhinolaryngology (ORL), Head and Neck Surgery; Goedstrup Hospital, Denmark, for assessment due to OD/GD from January 2017 to May 2023. RESULTS Most of the children had anosmia (60 %), whereas sensation of the basic tastes was intact in all but eight children (16 %). The lowest TDI scores were in children with congenital OD. The underlying etiology was congenital followed by postinfectious mostly related to Covid-19. Picky eating including anorectic traits were seen in 16 % of patients. CONCLUSION The focus on smell loss in pediatric population is low, and probably does not adequately reflect either underlying prevalence in this group or the possible consequences on a child's well-being. Moreover, increased awareness of children's smell and taste loss is needed, as it may be associated with eating disturbances.
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Affiliation(s)
- D Stankevice
- University Clinic for Flavour, Balance and Sleep, Department of Otorhinolaryngology, Head and Neck Surgery, Goedstrup Hospital, Hospitalsparken 15, DK-7400, Herning, Denmark.
| | - A W Fjaeldstad
- University Clinic for Flavour, Balance and Sleep, Department of Otorhinolaryngology, Head and Neck Surgery, Goedstrup Hospital, Hospitalsparken 15, DK-7400, Herning, Denmark; Department of Clinical Medicine, Aarhus University, Palle Juul-Jensen's Boulevard 82, DK-8200, Aarhus N, Denmark
| | - T Ovesen
- University Clinic for Flavour, Balance and Sleep, Department of Otorhinolaryngology, Head and Neck Surgery, Goedstrup Hospital, Hospitalsparken 15, DK-7400, Herning, Denmark; Department of Clinical Medicine, Aarhus University, Palle Juul-Jensen's Boulevard 82, DK-8200, Aarhus N, Denmark
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Gunder N, Hummel T. Parosmia in patients with post-infectious olfactory dysfunction in the era of COVID-19-associated olfactory impairment. HNO 2024; 72:649-656. [PMID: 38935276 PMCID: PMC11339106 DOI: 10.1007/s00106-024-01470-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/09/2024] [Indexed: 06/28/2024]
Abstract
OBJECTIVES A large number of patients with olfactory impairment are affected by parosmia or phantosmia. This study aimed to examine the demographic and clinical characteristics of parosmia. METHODS We performed a retrospective data analysis of patients consulting at our Smell and Taste Outpatient Clinic. A total of 297 patients were included (203 women, mean age 44.4 ± 13.7 years). Olfactory function was quantified using the "Sniffin' Sticks" composite TDI (odor threshold, determination, and identification) score. The presence of qualitative olfactory impairment was assessed trough medical history and a parosmia questionnaire. RESULTS Most of the patients showed olfactory impairment after an infection with SARS-CoV‑2 (84%) and were diagnosed with parosmia (49%). Patients with parosmia (PAR) (n = 201) were significantly younger compared to the group without parosmia (noPAR; n = 92) (PAR 43.2 ± 13 years vs. noPAR 47 ± 15.1 years, p = 0.03) and had a slightly shorter duration of disease, without reaching statistical significance (PAR 10.3 ± 4.9 months, noPAR 13.6 ± 37.6 months, p = 0.23). They also had higher TDI scores (PAR 24.3 ± 7 points, noPAR 21.4 ± 8.2 points, p = 0.003). CONCLUSIONS Patients affected by parosmia were younger and had a better olfactory function compared to patients without parosmia.
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Affiliation(s)
- Nadine Gunder
- Department of Otolaryngology, Head and Neck Surgery, Faculty of Medicine and University Hospital Carl Gustav Carus, TU Dresden, Fetscherstraße 74, 01307, Dresden, Germany.
| | - Thomas Hummel
- Department of Otolaryngology, Head and Neck Surgery, Faculty of Medicine and University Hospital Carl Gustav Carus, TU Dresden, Fetscherstraße 74, 01307, Dresden, Germany
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Sarnoch SO, Pepić A, Schmitz L, Becker B, Betz C, Hoffmann AS. The value of biomarkers in the therapy of CRSwNP with biologicals-a long-term follow-up of dupilumab therapy. Eur Arch Otorhinolaryngol 2024; 281:4789-4805. [PMID: 38709320 PMCID: PMC11393186 DOI: 10.1007/s00405-024-08574-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 02/19/2024] [Indexed: 05/07/2024]
Abstract
PURPOSE Since its release, Dupilumab has shown great results in treating severe uncontrolled CRSwNP. However, there is a lack of real-world data beyond 12 months of follow-up, and it is not clear to what extent biomarkers are appropriate for monitoring and predicting the Dupilumab therapy success. Hence, this study aims to analyze biomarkers for monitoring therapy, predicting therapy success and assess the effect of Dupilumab in real-world settings. METHODS The follow-up was performed with 104 patients retrospectively up to 22 months, assessing SNOT-22, NPS, olfactometry, ACS, FEV-1, and blood biomarkers (total serum IgE, Eosinophils, ECP). Patients were divided into subgroups depending on their pretherapeutic biomarker levels and subsequent development was analyzed. RESULTS There was substantially improvement in all clinical parameters up to 1 year and then continuously up to month 22. Patients with initially elevated baseline blood eosinophil counts (> 0.5 billion/L) had a trend of better SNOT-22 development after 1 year (- 12.19 points, p = 0.03). The course of total serum IgE showed moderate correlation with almost all clinical variables obtained. Therapy was well tolerated with only mild and transient adverse events. CONCLUSION Dupilumab has considerably reduced symptoms and disease severity even beyond 1 year of treatment, supporting its role as targeted and effective treatment option for CRSwNP. Our data shows that total serum IgE is a promising biomarker for the monitoring during the treatment with Dupilumab. Elevated pre-therapeutic serum eosinophil counts may be a predictor of good subjective response to therapy. Larger cohorts and a long-term-follow-up over years are needed to further consolidate these findings.
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Affiliation(s)
- Sven Ole Sarnoch
- Department of Otorhinolaryngology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany.
| | - Amra Pepić
- Institute of Medical Biometry and Epidemiology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany
| | - Lisa Schmitz
- Department of Otorhinolaryngology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany
| | - Benjamin Becker
- Department of Otorhinolaryngology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany
| | - Christian Betz
- Department of Otorhinolaryngology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany
| | - Anna-Sophie Hoffmann
- Department of Otorhinolaryngology, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany
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Kondo RN, Miot HA, Frare EZ, Garcia ECD, Yamakami AH, Fornazieri MA. Prevalence and factors associated with olfactory impairment among patients with acne treated with oral isotretinoin: a cross-sectional study. Braz J Otorhinolaryngol 2024; 90:101461. [PMID: 38991402 PMCID: PMC11295575 DOI: 10.1016/j.bjorl.2024.101461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Revised: 05/31/2024] [Accepted: 06/20/2024] [Indexed: 07/13/2024] Open
Abstract
OBJECTIVE This study aimed to investigate the prevalence and factors associated with olfactory dysfunction in individuals exposed to Isotretinoin (ISO) for the treatment of acne, using the University of Pennsylvania Smell Identification Test (UPSIT®). METHODS This cross-sectional study enrolled age and sex-matched patients with acne who were current users of oral ISO and unexposed controls without olfactory complaints. UPSIT® and a validated questionnaire (Nasal Obstruction Symptom Evaluation) were administered to evaluate nasal obstruction in patients exposed to ISO. RESULTS A total of seventy patients were recruited, with 35 in the exposed group and 35 in the unexposed group, consisting of 18 males and 17 females in each group, aged from 17 to 47 years. The prevalence of olfactory dysfunction was higher in the exposed group compared to the non-exposed group (62.9% vs. 17.1%), yielding a Prevalence Ratio (PR) of 3.7 (95% CI 1.9-7.1). However, no participants were categorized as anosmia or severe hyposmia and the majority of dysfunction was mild hyposmia compared to moderate hyposmia (51.5% vs. 11.4%). Among the exposed individuals, gasoline, orange, coffee, and wood exhibited the highest rates of identification errors (≥54%). Olfactory function demonstrated a negative correlation with treatment duration (p = 0.01), cumulative dose (p = 0.02), and nasal obstruction (p = 0.02). CONCLUSIONS Olfactory dysfunction was more prevalent among ISO users, despite the patients being unaware of the disorder. Olfactory changes were correlated with treatment duration, cumulative dose, and nasal obstruction. LEVEL OF EVIDENCE Level 4.
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Affiliation(s)
| | - Hélio Amante Miot
- Universidade Estadual Paulista (Unesp), Faculdade de Medicina de Botucatu, Botucatu, SP, Brazil
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Sabiniewicz A, Wittig S, Haehner A, Müller C, Galvao C, Nakanishi M, Hummel T. The digital scent device 20: an automated, self-administered odor identification test. Eur Arch Otorhinolaryngol 2024:10.1007/s00405-024-08887-4. [PMID: 39210076 DOI: 10.1007/s00405-024-08887-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2024] [Accepted: 07/31/2024] [Indexed: 09/04/2024]
Abstract
PURPOSE Assessing olfactory function is highly significant in clinical practice, particularly in the context of the recent COVID-19 pandemic. Recent approaches in this field emphasize the importance of reducing the time and cost devoted to olfactory testing procedures. Hence, the aim of the present study was to examine the reliability and basic characteristics of Digital Scent Device 20 (DSD-20), an innovative olfactory test consisting of 20 "universal odors", in a European population. METHODS A total of 88 participants (mean age = 45.1, SD = 20.3) volunteered for the study. The sample consisted of 37 normosmic controls and 51 dysosmic patients. RESULTS The correlation between DSD-20 and the total score in Sniffin' Sticks was high (TDI; R = .80, p < .001), and the test correlated with the individual components of the Sniffin' Sticks test. Furthermore, the correlation coefficient between DSD-20 test and retest was very high (R = .88, p < .001), which was additionally confirmed by a Bland-Altman plot. Essential characteristics of the DSD-20 are its simplicity in self-administration, speed of application, portability, and the fact that it can be reused. CONCLUSION Overall, the present study confirms previous notions on DSD-20 by demonstrating its high reliability and usefulness in separating patients with hyposmia/anosmia and normosmic controls.
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Affiliation(s)
- Agnieszka Sabiniewicz
- Smell and Taste Clinic, Department of Otorhinolaryngology, TU Dresden, Dresden, Germany.
| | - Sophia Wittig
- Smell and Taste Clinic, Department of Otorhinolaryngology, TU Dresden, Dresden, Germany
| | - Antje Haehner
- Smell and Taste Clinic, Department of Otorhinolaryngology, TU Dresden, Dresden, Germany
| | - Christopher Müller
- Smell and Taste Clinic, Department of Otorhinolaryngology, TU Dresden, Dresden, Germany
| | | | - Marco Nakanishi
- Department of Otorhinolaryngology, University Hospital of Brasília UnB-EBSERH, University of Brasilia, Brasilia, Federal District, Brazil
| | - Thomas Hummel
- Smell and Taste Clinic, Department of Otorhinolaryngology, TU Dresden, Dresden, Germany
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Ruda I, Chellapandian DC, Rott M, Scheid S, Freiherr J. Beyond Distracted Eating: Cognitive Distraction Downregulates Odor Pleasantness and Interacts with Weight Status. Nutrients 2024; 16:2871. [PMID: 39275187 PMCID: PMC11397456 DOI: 10.3390/nu16172871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2024] [Revised: 08/19/2024] [Accepted: 08/22/2024] [Indexed: 09/16/2024] Open
Abstract
Considering the widespread issue of distracted eating, our study investigates how cognitive distraction influences the sensory perception of food-related odors among individuals with varying weight statuses. We conducted an exploratory, randomized, and cross-sectional experimental study, using the Tetris game to simulate real-life cognitive distraction, incorporating two distraction levels (low and high) and presenting five distinct odors. A total of 59 participants, categorized into a lean (n = 30) and overweight/obese group (n = 29) based on their body mass index (BMI), received odor stimuli while playing Tetris at low and high difficulty, corresponding to low and high distraction levels, respectively. Participants subsequently rated odor intensity and pleasantness under the two cognitive distraction conditions. Respiratory movements were monitored to ensure accurate olfactory stimulation. Our findings revealed no significant difference in odor intensity ratings across distraction levels (p = 0.903). However, there was a significant reduction in odor pleasantness under high cognitive distraction (p = 0.007), more pronounced in lean participants compared to those with an overweight status (p = 0.035). Additionally, an interaction between gender and cognitive distraction effects was observed in odor pleasantness perception. The differential effects of distraction across weight-status groups and genders are discussed in the context of hedonic motivation and compensatory mechanisms. This study sheds light onto the sensory mechanisms underlying distracted eating and could inform more personalized strategies for promoting healthier eating habits in a world dominated by distractions.
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Affiliation(s)
- Iryna Ruda
- Department of Psychiatry and Psychotherapy, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schwabachanlage 6, 91054 Erlangen, Germany
| | - Deepak Charles Chellapandian
- Department of Psychiatry and Psychotherapy, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schwabachanlage 6, 91054 Erlangen, Germany
| | - Marlene Rott
- Department of Psychiatry and Psychotherapy, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schwabachanlage 6, 91054 Erlangen, Germany
| | - Selina Scheid
- Department of Psychiatry and Psychotherapy, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schwabachanlage 6, 91054 Erlangen, Germany
| | - Jessica Freiherr
- Department of Psychiatry and Psychotherapy, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schwabachanlage 6, 91054 Erlangen, Germany
- Sensory Analytics and Technologies, Fraunhofer Institute for Process Engineering and Packaging IVV, Giggenhauser Strasse 35, 85354 Freising, Germany
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Li Z, Pellegrino R, Kelly C, Hummel T. Olfactory training: perspective from people who were disturbed by their smell problems. Eur Arch Otorhinolaryngol 2024:10.1007/s00405-024-08911-7. [PMID: 39179914 DOI: 10.1007/s00405-024-08911-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2024] [Accepted: 08/11/2024] [Indexed: 08/26/2024]
Abstract
PURPOSE Olfactory training (OT) is an effective and affordable option in the treatment of olfactory dysfunction. Despite significant progress in the field in recent years, some factors influencing OT participation remain unclear. METHODS Based on an anonymous online survey orchestrated by AbScent.org the present study enrolled 450 participants and divided them into OT (n = 161) and No OT (n = 289) groups based on their OT participation. Participants also provided information on demographics, medical history, quality of life, OT duration for those who engaged in OT, and the reasons for non-participation in OT among those who did not. RESULTS Patients who had greater loss of quality of life participated more in OT. Similarly, more participation was observed in patients who noticed an improvement in their ability to smell. Notably, most of the sample engaged in OT trained less than four weeks (73%). In the No OT group, the primary barrier to OT participation was the unawareness of OT treatment (37%) and these barriers differed by age, where older people expressed interest but were unaware of OT treatment, while younger individuals exhibited more cautiousness about its effectiveness. CONCLUSION Lower quality of life drives active OT participation. Limited training periods and unawareness of OT serve as potential barriers to olfactory recovery. Clinicians should actively promote the background of OT and underscore the significance of adhering to the "prescribed" training regimen.
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Affiliation(s)
- Zetian Li
- Department of Otorhinolaryngology, Faculty of Medicine Carl Gustav Carus, Smell & Taste Clinic, Technische Universität Dresden, Fetscherstraße 74, 01307, Dresden, Germany.
| | | | | | - Thomas Hummel
- Department of Otorhinolaryngology, Faculty of Medicine Carl Gustav Carus, Smell & Taste Clinic, Technische Universität Dresden, Fetscherstraße 74, 01307, Dresden, Germany
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11
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Watkins CD. Mate assessment based on physical characteristics: a review and reflection. Biol Rev Camb Philos Soc 2024. [PMID: 39175167 DOI: 10.1111/brv.13131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 08/07/2024] [Accepted: 08/08/2024] [Indexed: 08/24/2024]
Abstract
Mate choice, and sex differences in romantic behaviours, represented one of the first major applications of evolutionary biology to human behaviour. This paper reviews Darwinian approaches to heterosexual mate assessment based on physical characteristics, placing the literature in its historical context (1871-1979), before turning (predominantly) to psychological research on attractiveness judgements based on physical characteristics. Attractiveness is consistently inferred across multiple modalities, with biological theories explaining why we differentiate certain individuals, on average, from others. Simultaneously, it is a judgement that varies systematically in light of our own traits, environment, and experiences. Over 30 years of research has generated robust effects alongside reasons to be humble in our lack of understanding of the precise physiological mechanisms involved in mate assessment. This review concludes with three questions to focus attention in further research, and proposes that our romantic preferences still provide a critical window into the evolution of human sexuality.
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Affiliation(s)
- Christopher D Watkins
- Division of Psychology and Forensic Sciences, School of Applied Sciences, Abertay University, Kydd Building, Bell Street, Dundee, DD11HG, UK
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Feit NZ, Kloosterman N, LaPointe KA, Pitiranggon C, Finnegan IE, Smith CD, Gregoski MJ, Rowan NR, Soler ZM, Schlosser RJ. Intranasal Trigeminal Function in Aging Adults. Am J Rhinol Allergy 2024:19458924241274973. [PMID: 39169723 DOI: 10.1177/19458924241274973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2024]
Abstract
BACKGROUND Intranasal trigeminal function is important in detecting environmental stimuli. The impact of age-associated chemosensory dysfunction upon taste and olfaction is well described, but an understanding of trigeminal loss (chemesthesis) is lacking. OBJECTIVE The goal of this study was to characterize trigeminal function in a cohort of older adults and explore potential impacts. METHODS Twenty-eight participants over 50 years of age were recruited from the community as part of an aging cohort study. This nested cohort completed chemosensory questionnaires, patient-reported outcome measures (PROMs), and psychophysical testing for taste (taste strips), olfaction (Sniffin' Sticks), and trigeminal function (eucalyptol lateralization). Data were analyzed for associations between trigeminal function, olfactory, and taste psychophysical performance, patient-reported metrics, and demographic risk factors. RESULTS Patient-reported trigeminal impairment is less severe than other chemosensory loss, with mean visual analog scores (VAS, rated 0-100 from least to most severe) for smell (32.9 ± 34.2), taste (20.6 ± 28.4), and trigeminal sensation (9.5 ± 12.8). Despite low VAS scores, psychophysical trigeminal dysfunction was present in 10 (35.7%) subjects. Psychophysical olfactory and taste dysfunction were present in 16 (57.1%) and eight (28.6%) participants respectively. Hypercholesterolemia was associated with psychophysical trigeminal dysfunction (mean lateralization performance in hypercholesterolemia 57.7% ± 17.1 vs. 74.1% ± 10.4, p = .008). CONCLUSION Intranasal trigeminal impairment is present in nearly one-third of aging adults when assessed by psychophysical methods but is under-recognized. Hyperlipidemia may be associated with trigeminal impairment. Future inquiries should better characterize these findings in larger and prospective cohorts.
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Affiliation(s)
- Noah Z Feit
- Department of Otolaryngology- Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina
| | - Nicole Kloosterman
- Department of Otolaryngology- Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina
| | - Kristina A LaPointe
- Department of Otolaryngology- Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina
| | - Charn Pitiranggon
- Department of Otolaryngology- Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina
| | - Isabel E Finnegan
- Department of Otolaryngology- Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina
| | - Carter D Smith
- Department of Otolaryngology- Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina
| | - Mathew J Gregoski
- Department of Public Health Sciences, Medical University of South Carolina, Charleston, South Carolina
| | - Nicholas R Rowan
- Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins School of Medicine, Baltimore, Maryland
| | - Zachary M Soler
- Department of Otolaryngology- Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina
| | - Rodney J Schlosser
- Department of Otolaryngology- Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina
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13
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Kim DH, Stybayeva G, Hwang SH. Short-term efficacy of platelet-rich plasma in the treatment of persistent olfactory dysfunction: systematic review and meta-analysis. Eur Arch Otorhinolaryngol 2024:10.1007/s00405-024-08885-6. [PMID: 39098960 DOI: 10.1007/s00405-024-08885-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2024] [Accepted: 07/29/2024] [Indexed: 08/06/2024]
Abstract
PURPOSE To assess the short-term effects of topical platelet-rich plasma (PRP) injection on persistent refractory olfactory dysfunction. METHODS A comprehensive literature search of the PubMed, SCOPUS, EMBASE, Web of Science, Google Scholar, and Cochrane databases was conducted for articles up to November 2023. The search focused on studies that compared the amelioration of olfactory dysfunction between a topical PRP treatment cohort and a control group (receiving either placebo or no treatment), along with pre- and post-treatment comparisons. Subgroup analysis of the evaluation of olfactory function was also performed. RESULTS The improvement in olfactory scores 1-3 months post-treatment (standardized mean difference = 1.5354 [95% confidence interval: 0.7992; 2.2716], I2 = 83.8%) was greater in the treatment group than in the control group. In the treatment group, PRP increased the threshold, discrimination, and identification (TDI) score for Sniffin' Sticks by > 5.5 (minimum clinically significant difference; mean difference = 6.1789 [3.9788; 8.3789], I2 = 0.0%), indicating clinically significant improvement based on verified examinations. The rate of significant improvement among patients was 0.6683 [0.5833; 0.7436] after treatment. All TDI subdomains were significantly and similarly improved after treatment. CONCLUSION This meta-analysis suggests that injection of PRP into the olfactory fissure or surrounding mucosal areas is an effective treatment for persistent refractory olfactory dysfunction in the short term.
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Affiliation(s)
- Do Hyun Kim
- Department of Otolaryngology-Head and Neck Surgery, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Gulnaz Stybayeva
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN, USA
| | - Se Hwan Hwang
- Department of Otolaryngology-Head and Neck Surgery, Bucheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 327 Sosa-ro, Bucheon-si, Gyeonggi-do, Seoul, 14647, Korea.
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14
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Monk AS, Pyati S, Lamb M, Melott N, Benaim EH, Wiesen C, Klatt-Cromwell C, Thorp BD, Ebert CS, Kimple AJ, Senior BA. The relationship between survey-based subjective olfactory awareness and objective olfactory function. Int Forum Allergy Rhinol 2024; 14:1395-1398. [PMID: 38618980 DOI: 10.1002/alr.23355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 03/14/2024] [Accepted: 04/03/2024] [Indexed: 04/16/2024]
Abstract
KEY POINTS Correlation between symptom-based surveys and objective olfactory testing is variable. For diagnosis and symptom monitoring, surveys should correlate with objective testing. The Odor Awareness Scale (OAS) and Affective Importance of Odor Scale (AIO) showed significant but moderate positive correlations with University of Pennsylvania Scent Identification Test (UPSIT) score.
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Affiliation(s)
- Aurelia S Monk
- Department of Otolaryngology/Head and Neck Surgery, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Shreyas Pyati
- Department of Otolaryngology/Head and Neck Surgery, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Meredith Lamb
- Department of Otolaryngology/Head and Neck Surgery, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Nick Melott
- Department of Otolaryngology/Head and Neck Surgery, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Ezer H Benaim
- Department of Otolaryngology/Head and Neck Surgery, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Christoper Wiesen
- The Odum Institute, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Cristine Klatt-Cromwell
- Department of Otolaryngology/Head and Neck Surgery, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Brian D Thorp
- Department of Otolaryngology/Head and Neck Surgery, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Charles S Ebert
- Department of Otolaryngology/Head and Neck Surgery, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Adam J Kimple
- Department of Otolaryngology/Head and Neck Surgery, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Brent A Senior
- Department of Otolaryngology/Head and Neck Surgery, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
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Yurimoto T, Seki F, Yamada A, Okajima J, Yambe T, Takewa Y, Kamioka M, Inoue T, Inoue Y, Sasaki E. Development of a noninvasive olfactory stimulation fMRI system in marmosets. Sci Rep 2024; 14:17830. [PMID: 39090331 PMCID: PMC11294473 DOI: 10.1038/s41598-024-68508-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Accepted: 07/24/2024] [Indexed: 08/04/2024] Open
Abstract
Olfactory dysfunction is associated with aging and the earliest stages of neurodegenerative diseases, such as Alzheimer's and Parkinson's diseases; it is thought to be an early biomarker of cognitive decline. In marmosets, a small non-human primate model used in brain research, olfactory pathway activity during olfactory stimulation has not been well studied because of the difficulty in clearly switching olfactory stimuli inside a narrow MRI. Here, we developed an olfactory-stimulated fMRI system using a small-aperture MRI machine. The olfactory presentation system consisted of two tubes, one for supply and one for suction of olfactory stimulants and a balloon valve. A balloon valve installed in the air supply tube controlled the presentation of the olfactory stimulant, which enabled sharp olfactory stimulation within MRI, such as 30 s of stimulation repeated five times at five-minute intervals. The olfactory stimulation system was validated in vivo and in a simulated system. fMRI analysis showed a rapid increase in signal values within 30 s of olfactory stimulation in eight regions related to the sense of smell. As these regions include those associated with Alzheimer's and Parkinson's diseases, olfactory stimulation fMRI may be useful in clarifying the relationship between olfactory dysfunction and dementia in non-human primates.
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Affiliation(s)
- Terumi Yurimoto
- Department of Marmoset Biology and Medicine, Central Institute for Experimental Medicine and Life Science, Kawasaki, Japan
| | - Fumiko Seki
- Bioimaging Center, Central Institute for Experimental Medicine and Life Science, Kawasaki, Japan
| | - Akihiro Yamada
- Department of Clinical Engineering, Komatsu University, Komatsu, Japan
- Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | | | - Tomoyuki Yambe
- Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | - Yoshiaki Takewa
- Advanced Medical Engineering Research Center, Asahikawa Medical University, Asahikawa, Japan
| | - Michiko Kamioka
- Department of Marmoset Biology and Medicine, Central Institute for Experimental Medicine and Life Science, Kawasaki, Japan
| | - Takashi Inoue
- Department of Marmoset Biology and Medicine, Central Institute for Experimental Medicine and Life Science, Kawasaki, Japan
- Faculty of Veterinary Medicine, Okayama University of Science, Imabari, Japan
| | - Yusuke Inoue
- Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan.
- Advanced Medical Engineering Research Center, Asahikawa Medical University, Asahikawa, Japan.
| | - Erika Sasaki
- Department of Marmoset Biology and Medicine, Central Institute for Experimental Medicine and Life Science, Kawasaki, Japan.
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16
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Poirier AC, Melin AD. Smell throughout the life course. Evol Anthropol 2024; 33:e22030. [PMID: 38704704 DOI: 10.1002/evan.22030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 04/12/2024] [Accepted: 04/18/2024] [Indexed: 05/07/2024]
Abstract
The sense of smell is an important mediator of health and sociality at all stages of life, yet it has received limited attention in our lineage. Olfaction starts in utero and participates in the establishment of social bonds in children, and of romantic and sexual relationships after puberty. Smell further plays a key role in food assessment and danger avoidance; in modern societies, it also guides our consumer behavior. Sensory abilities typically decrease with age and can be impacted by diseases, with repercussions on health and well-being. Here, we critically review our current understanding of human olfactory communication to refute outdated notions that our sense of smell is of low importance. We provide a summary of the biology of olfaction, give a prospective overview of the importance of the sense of smell throughout the life course, and conclude with an outline of the limitations and future directions in this field.
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Affiliation(s)
- Alice C Poirier
- Department of Anthropology and Archaeology, University of Calgary, Calgary, Alberta, Canada
| | - Amanda D Melin
- Department of Anthropology and Archaeology, University of Calgary, Calgary, Alberta, Canada
- Department of Medical Genetics, University of Calgary, Calgary, Alberta, Canada
- Alberta Children's Hospital Research Institute, Calgary, Alberta, Canada
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17
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Hintschich CA, Ma C, Hähner A, Hummel T. Pronounced Olfactory Habituation with Age. Laryngoscope 2024; 134:3765-3768. [PMID: 38597777 DOI: 10.1002/lary.31442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 03/05/2024] [Accepted: 03/18/2024] [Indexed: 04/11/2024]
Abstract
OBJECTIVES Olfactory habituation is a transient decrease in olfactory sensitivity caused by prolonged odor exposure, aiding in the discernment of new olfactory stimuli against the background. We explored the impact of subclinical olfactory impairment on odor habituation using age as a proxy. METHODS Before the actual experiment, the individual olfactory threshold for the rose-like odorant phenylethyl alcohol (PEA) was assessed separately for the left and right nostril using the "Sniffin' Sticks" test, and ratings for odor intensity and pleasantness were collected. After applying a nasal clip continuously delivering PEA odor to one nostril for 10 min and 2 h, respectively, threshold, intensity, and pleasantness were reassessed immediately after clip removal. RESULTS In the group of 80 participants (younger adults-mean age 27.7 ± 4.5 years; older adults-mean age 61.5 ± 4.7 years), olfactory thresholds were already significantly elevated after just 10 min, and this habituation was even more pronounced after 2 h. This effect could be observed bilaterally even though significantly more distinct on the exposed side. Older participants generally exhibited a more pronounced habituation on the exposed side after 2 h compared to the younger participants. CONCLUSION The results indicate that older people experience more notable habituation after extended exposure to odors. This is most likely due to the compromised olfactory function in age. Although older and younger subjects scored in the normosmic range when tested with standardized olfactory tests, the stress on the system after exposure to an odor clearly revealed the lower functionality of the aging sense of smell. LEVEL OF EVIDENCE 3 Laryngoscope, 134:3765-3768, 2024.
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Affiliation(s)
- Constantin A Hintschich
- Department of Otorhinolaryngology, Smell and Taste Clinic, TU Dresden, Dresden, Germany
- Department of Otorhinolaryngology, Regensburg University Hospital, Regensburg, Germany
| | - Cindy Ma
- Department of Otorhinolaryngology, Smell and Taste Clinic, TU Dresden, Dresden, Germany
| | - Antje Hähner
- Department of Otorhinolaryngology, Smell and Taste Clinic, TU Dresden, Dresden, Germany
| | - Thomas Hummel
- Department of Otorhinolaryngology, Smell and Taste Clinic, TU Dresden, Dresden, Germany
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Ollitrault G, Achebouche R, Dreux A, Murail S, Audouze K, Tromelin A, Taboureau O. Pred-O3, a web server to predict molecules, olfactory receptors and odor relationships. Nucleic Acids Res 2024; 52:W507-W512. [PMID: 38661190 PMCID: PMC11223793 DOI: 10.1093/nar/gkae305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 04/04/2024] [Accepted: 04/23/2024] [Indexed: 04/26/2024] Open
Abstract
The sense of smell is a biological process involving volatile molecules that interact with proteins called olfactory receptors to transmit a nervous message that allows the recognition of a perceived odor. However, the relationships between odorant molecules, olfactory receptors and odors (O3) are far from being well understood due to the combinatorial olfactory codes and large family of olfactory receptors. This is the reason why, based on 5802 odorant molecules and their annotations to 863 olfactory receptors (human) and 7029 odors and flavors annotations, a web server called Pred-O3 has been designed to provide insights into olfaction. Predictive models based on Artificial Intelligence have been developed allowing to suggest olfactory receptors and odors associated with a new molecule. In addition, based on the encoding of the odorant molecule's structure, physicochemical features related to odors and/or olfactory receptors are proposed. Finally, based on the structural models of the 98 olfactory receptors a systematic docking protocol can be applied and suggest if a molecule can bind or not to an olfactory receptor. Therefore, Pred-O3 is well suited to aid in the design of new odorant molecules and assist in fragrance research and sensory neuroscience. Pred-O3 is accessible at ' https://odor.rpbs.univ-paris-diderot.fr/'.
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Affiliation(s)
| | | | - Antoine Dreux
- Inserm U1133, CNRS UMR 8251, Université Paris Cité, Paris, France
| | - Samuel Murail
- Inserm U1133, CNRS UMR 8251, Université Paris Cité, Paris, France
| | | | - Anne Tromelin
- Centre des Sciences du Goût et de l’Alimentation, CNRS, INRAE, Institut Agro, Université de Bourgogne, F-21000 Dijon, France
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19
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Chun M, Yu HJ, Jung H. A Deep Learning-Based Rotten Food Recognition App for Older Adults: Development and Usability Study. JMIR Form Res 2024; 8:e55342. [PMID: 38959501 PMCID: PMC11255527 DOI: 10.2196/55342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Revised: 04/24/2024] [Accepted: 05/30/2024] [Indexed: 07/05/2024] Open
Abstract
BACKGROUND Older adults are at greater risk of eating rotten fruits and of getting food poisoning because cognitive function declines as they age, making it difficult to distinguish rotten fruits. To address this problem, researchers have developed and evaluated various tools to detect rotten food items in various ways. Nevertheless, little is known about how to create an app to detect rotten food items to support older adults at a risk of health problems from eating rotten food items. OBJECTIVE This study aimed to (1) create a smartphone app that enables older adults to take a picture of food items with a camera and classifies the fruit as rotten or not rotten for older adults and (2) evaluate the usability of the app and the perceptions of older adults about the app. METHODS We developed a smartphone app that supports older adults in determining whether the 3 fruits selected for this study (apple, banana, and orange) were fresh enough to eat. We used several residual deep networks to check whether the fruit photos collected were of fresh fruit. We recruited healthy older adults aged over 65 years (n=15, 57.7%, males and n=11, 42.3%, females) as participants. We evaluated the usability of the app and the participants' perceptions about the app through surveys and interviews. We analyzed the survey responses, including an after-scenario questionnaire, as evaluation indicators of the usability of the app and collected qualitative data from the interviewees for in-depth analysis of the survey responses. RESULTS The participants were satisfied with using an app to determine whether a fruit is fresh by taking a picture of the fruit but are reluctant to use the paid version of the app. The survey results revealed that the participants tended to use the app efficiently to take pictures of fruits and determine their freshness. The qualitative data analysis on app usability and participants' perceptions about the app revealed that they found the app simple and easy to use, they had no difficulty taking pictures, and they found the app interface visually satisfactory. CONCLUSIONS This study suggests the possibility of developing an app that supports older adults in identifying rotten food items effectively and efficiently. Future work to make the app distinguish the freshness of various food items other than the 3 fruits selected still remains.
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Affiliation(s)
- Minki Chun
- Department of Computer Science and Engineering, University of Seoul, Seoul, Republic of Korea
| | - Ha-Jin Yu
- Department of Computer Science and Engineering, University of Seoul, Seoul, Republic of Korea
- Department of Artificial Intelligence, University of Seoul, Seoul, Republic of Korea
| | - Hyunggu Jung
- Department of Computer Science and Engineering, University of Seoul, Seoul, Republic of Korea
- Department of Artificial Intelligence, University of Seoul, Seoul, Republic of Korea
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20
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Lee L, Luke L, Boak D, Philpott C. Impact of olfactory disorders on personal safety and well-being: a cross-sectional observational study. Eur Arch Otorhinolaryngol 2024; 281:3639-3647. [PMID: 38396298 PMCID: PMC11211102 DOI: 10.1007/s00405-024-08529-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Accepted: 02/05/2024] [Indexed: 02/25/2024]
Abstract
OBJECTIVES Investigate safety perceptions, quantify hazardous events, and analyse their manifestations in individuals with olfactory dysfunction through an online cross-sectional survey. METHODS An online survey, available from 25th February to 28th September 2022, captured data on demographics, olfactory disorder causes, safety concerns, and experienced hazardous events. Distributed via Fifth Sense channels, it targeted individuals with self-claimed olfactory dysfunction. RESULTS Of 432 responses, the majority were female (79.6%), aged 41-70, with 20.6% non-UK residents from 21 countries. Leading causes of dysfunction were Covid-19 (22%), idiopathic (20.8%), and congenital (14.4%). Safety concerns were high (85.9%), with gas, smoke, and food as major worries. Over 5 years, 32.2% faced ≥ 1 food incident, 14.8% ≥ 1 gas incident, 34.5% ≥ 1 gas scare, and 18.5% ≥ 1 work incident. Preventative measures were taken by 60.2% at home. Key limitations of this study were self-reported data and sampling bias of charity members. CONCLUSION This study highlights the significant impact of smell loss on personal safety and emotional well-being. There is an unmet need in mitigating safety concerns/events for individuals with olfactory dysfunction. We suggest collaborate strategies such as educating the public sector and high-risk sectors (e.g. gas companies), and introducing safety 'scratch and sniff' cards as a screening method. Regular assessment of an individual's olfactory ability, similar to routine assessments for other sensory systems (sight, hearing) may allow proactive identification of at-risk people and corrective measures to take place.
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Affiliation(s)
- Liam Lee
- University of East Anglia Medical School, University of East Anglia, Norwich, UK.
| | - Louis Luke
- University of East Anglia Medical School, University of East Anglia, Norwich, UK
- Ear, Nose and Throat (ENT) Department, James Paget University Hospital, James Paget University Hospitals NHS Foundation Trust, Great Yarmouth, UK
| | - Duncan Boak
- Fifth Sense, Unit 2, Franklins House, Wesley Lane, Bicester, OX26 6JU, UK
| | - Carl Philpott
- University of East Anglia Medical School, University of East Anglia, Norwich, UK
- Ear, Nose and Throat (ENT) Department, James Paget University Hospital, James Paget University Hospitals NHS Foundation Trust, Great Yarmouth, UK
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Suleiman KT, Chiu RG, Nyenhuis SM, Eldeirawi K, Lee VS. Association of alcohol use with olfactory function among older adults. Am J Otolaryngol 2024; 45:104271. [PMID: 38574516 DOI: 10.1016/j.amjoto.2024.104271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Accepted: 03/26/2024] [Indexed: 04/06/2024]
Abstract
BACKGROUND/PURPOSE Olfactory dysfunction (OD) has been recognized as an early biomarker for neurodegenerative diseases. Identifying behaviors that increase the risk of OD is crucial for early recognition of neurogenerative diseases. Alcohol consumption can potentially impact olfaction through its neurotoxic effects. This study aims to examine the relationship between alcohol consumption and OD, using data from the National Social Life, Health, and Aging Project (NSHAP). METHODS This cross-sectional study was conducted on data for 2757 adults from Round 1 of NSHAP. OD was defined as correctly identifying 0-3 odors in the 5-item Sniffin' Sticks test while normal olfactory function was defined as correctly identifying 4-5 odors. Multivariable logistic regression was utilized to examine the association between alcohol consumption and OD, controlling for age, race, and comorbidities. Analyses were weighted to account for the sampling design. RESULTS OD was present in 23.1 % of adults. The average age among those with OD was 71.2 ± 7.8 years, compared to 66.9 ± 7.2 years in those with normal olfaction. In terms of alcohol consumption, 31.1 % of adults with OD were light-to-moderate drinkers and 7.7 % were heavy drinkers, compared to 35.6 % light-to-moderate and 7.7 % heavy drinkers in the normal olfaction group. After adjusting for age, gender, race, and education, neither light-to-moderate drinking (aOR: 0.99; 95 % CI: 0.76-1.29) nor heavy drinking (aOR: 1.24; 95 % CI: 0.83-1.85) were significantly associated with OD. CONCLUSION Alcohol consumption was not associated with OD after controlling for covariates. While this study provides insight into the relationship between alcohol consumption and OD, further research is needed due to conflicting results in previous studies.
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Affiliation(s)
- Khamis T Suleiman
- Department of Otolaryngology-Head and Neck Surgery, University of Illinois at Chicago, 1855 West Taylor St, MC 648, Room 3.87, Chicago, IL 60611, USA.
| | - Richard G Chiu
- Department of Otolaryngology-Head and Neck Surgery, University of Illinois at Chicago, 1855 West Taylor St, MC 648, Room 3.87, Chicago, IL 60611, USA.
| | - Sharmilee M Nyenhuis
- Department of Pediatrics, Section of Allergy and Immunology, University of Chicago, 5721 S Maryland Ave, Chicago, IL 60637, USA.
| | - Kamal Eldeirawi
- Department of Population Health Nursing Science, University of Illinois Chicago, College of Nursing, 845 S Damen Ave, Chicago, IL 60612, USA.
| | - Victoria S Lee
- Department of Otolaryngology-Head and Neck Surgery, University of Illinois at Chicago, 1855 West Taylor St, MC 648, Room 3.87, Chicago, IL 60611, USA.
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22
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Renzetti S, van Thriel C, Lucchini RG, Smith DR, Peli M, Borgese L, Cirelli P, Bilo F, Patrono A, Cagna G, Rechtman E, Idili S, Ongaro E, Calza S, Rota M, Wright RO, Claus Henn B, Horton MK, Placidi D. A multi-environmental source approach to explore associations between metals exposure and olfactory identification among school-age children residing in northern Italy. JOURNAL OF EXPOSURE SCIENCE & ENVIRONMENTAL EPIDEMIOLOGY 2024; 34:699-708. [PMID: 38802534 DOI: 10.1038/s41370-024-00687-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 05/13/2024] [Accepted: 05/14/2024] [Indexed: 05/29/2024]
Abstract
BACKGROUND Metal exposures can adversely impact olfactory function. Few studies have examined this association in children. Further, metal exposure occurs as a mixture, yet previous studies of metal-associated olfactory dysfunction only examined individual metals. Preventing olfactory dysfunctions can improve quality of life and prevent neurodegenerative diseases with long-term health implications. OBJECTIVE We aimed to test the association between exposure to a mixture of 12 metals measured in environmental sources and olfactory function among children and adolescents residing in the industrialized province of Brescia, Italy. METHODS We enrolled 130 children between 6 and 13 years old (51.5% females) and used the "Sniffin' Sticks" test to measure olfactory performance in identifying smells. We used a portable X-ray fluorescence instrument to determine concentrations of metals (arsenic (As), calcium, cadmium (Cd), chromium, copper, iron, manganese, lead (Pb), antimony, titanium, vanadium and zinc) in outdoor and indoor deposited dust and soil samples collected from participants' households. We used an extension of weighted quantile sum (WQS) regression to test the association between exposure to metal mixtures in multiple environmental media and olfactory function adjusting for age, sex, socio-economic status, intelligence quotient and parents' smoking status. RESULTS A higher multi-source mixture was significantly associated with a reduced Sniffin' Sticks identification score (β = -0.228; 95% CI -0.433, -0.020). Indoor dust concentrations of Pb, Cd and As provided the strongest contributions to this association (13.8%, 13.3% and 10.1%, respectively). The metal mixture in indoor dust contributed more (for 8 metals out of 12) to the association between metals and olfactory function compared to soil or outdoor dust. IMPACT STATEMENT Among a mixture of 12 metals measured in three different environmental sources (soil, outdoor and indoor dust), we identified Pb, Cd and As measured in indoor dust as the main contributors to reduced olfactory function in children and adolescents residing in an industrialized area. Exposure to indoor pollution can be effectively reduced through individual and public health interventions allowing to prevent the deterioration of olfactory functions. Moreover, the identification of the factors that can deteriorate olfactory functions can be a helpful instrument to improve quality of life and prevent neurodegenerative diseases as long-term health implications.
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Affiliation(s)
- Stefano Renzetti
- Department of Medical-Surgical Specialties, Radiological Sciences and Public Health, Università degli Studi di Brescia, Brescia, Italy.
| | - Christoph van Thriel
- Leibniz Research Centre for Working Environment and Human Factors (IfADo), Neurotoxicology and Chemosensation, TU Dortmund, Dortmund, Germany
| | - Roberto G Lucchini
- Department of Biochemical, Biomedical and Neurosciences, Università degli Studi di Modena e Reggio Emilia, Modena, Italy
- Department of Environmental Health Sciences, School of Public Health, Florida International University, Miami, FL, USA
| | - Donald R Smith
- Department of Microbiology and Environmental Toxicology, University of California, Santa Cruz, CA, USA
| | - Marco Peli
- Department of Civil, Environmental, Architectural Engineering and Mathematics, Università degli Studi di Brescia, Brescia, Italy
| | - Laura Borgese
- Department of Mechanical and Industrial Engineering, Università degli Studi di Brescia, Brescia, Italy
| | - Paola Cirelli
- Department of Mechanical and Industrial Engineering, Università degli Studi di Brescia, Brescia, Italy
| | - Fabjola Bilo
- Department of Mechanical and Industrial Engineering, Università degli Studi di Brescia, Brescia, Italy
| | - Alessandra Patrono
- Department of Medical-Surgical Specialties, Radiological Sciences and Public Health, Università degli Studi di Brescia, Brescia, Italy
- Department of Molecular and Translational Medicine, Università degli Studi di Brescia, Brescia, Italy
| | - Giuseppa Cagna
- Department of Medical-Surgical Specialties, Radiological Sciences and Public Health, Università degli Studi di Brescia, Brescia, Italy
| | - Elza Rechtman
- Department of Environmental Medicine and Public Health, Icahn School of Medicine, New York, NY, USA
| | - Stefania Idili
- Department of Medical-Surgical Specialties, Radiological Sciences and Public Health, Università degli Studi di Brescia, Brescia, Italy
| | - Elisa Ongaro
- Department of Medical-Surgical Specialties, Radiological Sciences and Public Health, Università degli Studi di Brescia, Brescia, Italy
| | - Stefano Calza
- Department of Molecular and Translational Medicine, Università degli Studi di Brescia, Brescia, Italy
| | - Matteo Rota
- Department of Molecular and Translational Medicine, Università degli Studi di Brescia, Brescia, Italy
| | - Robert O Wright
- Department of Environmental Medicine and Public Health, Icahn School of Medicine, New York, NY, USA
| | - Birgit Claus Henn
- Department of Environmental Health, Boston University School of Public Health, Boston, MA, USA
| | - Megan K Horton
- Department of Environmental Medicine and Public Health, Icahn School of Medicine, New York, NY, USA
| | - Donatella Placidi
- Department of Medical-Surgical Specialties, Radiological Sciences and Public Health, Università degli Studi di Brescia, Brescia, Italy
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23
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Young K, Morden FT, Blount Q, Johnson A, Kejriwal S, Bulosan H, Koshi EJ, Abouyared M, Siddiqui F, Kim JH. Efficacy of the nasal airflow-inducing maneuver in the olfactory rehabilitation of laryngectomy patients: A systematic review and meta-analysis. Int Forum Allergy Rhinol 2024. [PMID: 38946145 DOI: 10.1002/alr.23391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 06/04/2024] [Accepted: 06/05/2024] [Indexed: 07/02/2024]
Abstract
INTRODUCTION This is the first systematic review and meta-analysis to investigate the effectiveness of the nasal airflow-inducing maneuver (NAIM) in olfactory rehabilitation for total laryngectomy (TL) patients. METHODS We conducted a systematic literature search following Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. The inclusion criteria required that patients must have undergone a TL with subsequent NAIM training for at least 2 weeks and olfactory evaluation. The impact of NAIM on olfactory outcomes compared to that at baseline was measured. Olfactory measures included the Sniffin' Sticks Test, Smell Disk Test, Scandinavian Odor Identification Test, and Quick Odor Detection Test. The primary outcome measures were the proportion of patients with normosmia at baseline and after intervention. RESULTS Seven studies from 2000 to 2023 comprising a total of 290 TL patients met the inclusion criteria. The meta-analysis revealed that prior to intervention, the pooled proportion of patients with normosmia was 0.16 (95% confidence interval [CI]: 0.09‒0.27, p = 0.01). After intervention, the same proportion increased to 0.55 (95% CI: 0.45‒0.68, p = 0.001). Among the included patients, 88.3% were initially anosmic or hyposmic, which was reduced to 48.9% after NAIM practice, with 51.1% achieving normosmia. The percent improvement was not found to be significantly associated with the timing of intervention post-TL (p = 0.18). CONCLUSIONS NAIM increased the proportion of patients who achieved normosmia in TL patients. NAIM stands out as a safe, easily teachable maneuver with promising results. Further efforts are warranted to provide specific recommendations and guidelines for the use of NAIM in clinical practice.
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Affiliation(s)
- Kurtis Young
- Department of Otolaryngology-Head and Neck Surgery, University of Nevada, Nevada, Las Vegas, USA
| | - Frances T Morden
- Department of Surgery, University of Washington Medical Center, Seattle, Washington, USA
| | - Quinton Blount
- Department of Otolaryngology-Head and Neck Surgery, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Austin Johnson
- Department of Otolaryngology-Head and Neck Surgery, University of Texas Medical Branch at Galveston, Galveston, Texas, USA
| | - Sameer Kejriwal
- John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, Hawaii, USA
| | - Hannah Bulosan
- John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, Hawaii, USA
| | - Elliott J Koshi
- Department of Otolaryngology-Head and Neck Surgery, Tripler Army Medical Center, Honolulu, Hawaii, USA
| | - Marianne Abouyared
- Department of Otolaryngology-Head and Neck Surgery, University of California, Davis, California, USA
| | - Farrah Siddiqui
- Department of Otolaryngology-Head and Neck Surgery, University of Texas Medical Branch at Galveston, Galveston, Texas, USA
| | - Jee-Hong Kim
- Department of Otolaryngology-Head and Neck Surgery, University of Nevada, Nevada, Las Vegas, USA
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24
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Schertel Cassiano L, Jensen AB, Pajaniaye J, Lopez R, Fjaeldstad AW, Nascimento GG. Periodontitis is associated with impaired olfactory function: A clinical study. J Periodontal Res 2024. [PMID: 38888002 DOI: 10.1111/jre.13315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Revised: 05/27/2024] [Accepted: 06/03/2024] [Indexed: 06/20/2024]
Abstract
AIM To explore the association between periodontitis and olfactory disorders. METHODS Clinical data were collected from 198 individuals between the ages of 18 and 60 years living in Denmark. The exposure was periodontitis, and the outcome was olfactory function (Threshold, Discrimination, Identification - TDI score), both measured clinically. Covariates included sex, age, education level, income, usage of nasal spray, tongue coating, halitosis, xerostomia, smoking, and history of COVID-19. Structural equation modeling was used to estimate the association between periodontitis and olfactory function. Periodontitis was defined using the AAP/EFP classification and dichotomized into "no" (healthy subjects) and "yes" (Stages I, II, and III). Olfactory function was treated as a one-factor latent variable, including the different olfactory scores. In addition, extra models were performed considering each olfactory component as a separate outcome and the TDI Global Score. RESULTS The results showed that periodontitis was associated with a lower olfactory function [standardized coefficient (SC) -0.264, 95% CI -0.401, -0.118]. Additionally, periodontitis was also associated with a lower olfactory Threshold (odorant concentration required for detection) (SC -0.207, 95% CI -0.325, -0.089), Discrimination (ability to discriminate between odorants) (SC -0.149, 95% CI -0.270, -0.027), Identification (ability to identify odorants) scores (SC -0.161, 95% CI -0.277, -0.045), and TDI Global Score (SC -0.234, 95% CI -0.370, -0.099). CONCLUSIONS This study suggests that periodontitis is associated with olfactory impairment.
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Affiliation(s)
- Luisa Schertel Cassiano
- Section for Oral Ecology, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark
| | - Anne Birkeholm Jensen
- Section for Oral Ecology, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark
| | - Julie Pajaniaye
- Section for Oral Ecology, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark
| | - Rodrigo Lopez
- Center for Translational Oral Research - Periodontology, Department of Clinical Dentistry, University of Bergen, Bergen, Norway
- School of Dentistry, Faculty of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | | | - Gustavo G Nascimento
- Oral Health Academic Clinical Programme, Duke-NUS Medical School, Singapore City, Singapore
- National Dental Research Institute Singapore, National Dental Centre, Singapore City, Singapore
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25
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Fjaeldstad AW. Using Cooking Schools to Improve the Pleasure of Food and Cooking in Patients Experiencing Smell Loss. Foods 2024; 13:1821. [PMID: 38928763 PMCID: PMC11202556 DOI: 10.3390/foods13121821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Revised: 05/09/2024] [Accepted: 06/06/2024] [Indexed: 06/28/2024] Open
Abstract
Smell loss affects around 15-20% of the population, with a major effect on the quality of life. The most common complaint is the impairment of the eating experience, with around 90% of patients reporting this issue. A study conducted at a specialised Taste and Smell Clinic investigated if food and cooking can positively affect the enjoyment of food, subjective cooking skills, and quality of life in patients with smell loss. The 49 participants in the study received a 5-week cooking school course that focused on emphasizing the other senses to regain the enjoyment of food. Participants gained more confidence in cooking, and their quality of life improved significantly. Positively evaluated recipes were adjusted based on feedback and published as free e-books in Danish, German, and English. Eating and cooking are multisensory experiences, and the perception of food depends on the complex interaction of senses and surroundings. If the olfactory input is reduced or absent, both the enjoyment and cooking experience can be negatively affected. Therefore, focusing on food and cooking can have a positive impact on patients with smell loss.
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Affiliation(s)
- Alexander Wieck Fjaeldstad
- Flavour Clinic, University Clinic for Flavour, Balance and Sleep, Department of Otorhinolaryngology, Regional Hospital Gødstrup, Hospitalsparken 15, 7400 Herning, Denmark;
- Flavour Institute, Department of Clinical Medicine, Aarhus University, Palle Juul-Jensens Boulevard 99, 8200 Aarhus N, Denmark
- Center for Eudaimonia and Human Flourishing, Linacre College, University of Oxford, Stoke House, Oxford OX3 9BX, UK
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26
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Kikuta S, Nagayama S, Hasegawa-Ishii S. Structures and functions of the normal and injured human olfactory epithelium. Front Neural Circuits 2024; 18:1406218. [PMID: 38903957 PMCID: PMC11188711 DOI: 10.3389/fncir.2024.1406218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2024] [Accepted: 05/20/2024] [Indexed: 06/22/2024] Open
Abstract
The olfactory epithelium (OE) is directly exposed to environmental agents entering the nasal cavity, leaving OSNs prone to injury and degeneration. The causes of olfactory dysfunction are diverse and include head trauma, neurodegenerative diseases, and aging, but the main causes are chronic rhinosinusitis (CRS) and viral infections. In CRS and viral infections, reduced airflow due to local inflammation, inflammatory cytokine production, release of degranulated proteins from eosinophils, and cell injury lead to decreased olfactory function. It is well known that injury-induced loss of mature OSNs in the adult OE causes massive regeneration of new OSNs within a few months through the proliferation and differentiation of progenitor basal cells that are subsequently incorporated into olfactory neural circuits. Although normal olfactory function returns after injury in most cases, prolonged olfactory impairment and lack of improvement in olfactory function in some cases poses a major clinical problem. Persistent inflammation or severe injury in the OE results in morphological changes in the OE and respiratory epithelium and decreases the number of mature OSNs, resulting in irreversible loss of olfactory function. In this review, we discuss the histological structure and distribution of the human OE, and the pathogenesis of olfactory dysfunction associated with CRS and viral infection.
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Affiliation(s)
- Shu Kikuta
- Department of Otolaryngology-Head and Neck Surgery, Faculty of Medicine, Nihon University, Tokyo, Japan
| | - Shin Nagayama
- Department of Neurobiology and Anatomy, McGovern Medical School at The University of Texas Health Science Center at Houston, Houston, TX, United States
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27
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Stark R. The olfactory bulb: A neuroendocrine spotlight on feeding and metabolism. J Neuroendocrinol 2024; 36:e13382. [PMID: 38468186 DOI: 10.1111/jne.13382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 02/22/2024] [Accepted: 02/25/2024] [Indexed: 03/13/2024]
Abstract
Olfaction is the most ancient sense and is needed for food-seeking, danger protection, mating and survival. It is often the first sensory modality to perceive changes in the external environment, before sight, taste or sound. Odour molecules activate olfactory sensory neurons that reside on the olfactory epithelium in the nasal cavity, which transmits this odour-specific information to the olfactory bulb (OB), where it is relayed to higher brain regions involved in olfactory perception and behaviour. Besides odour processing, recent studies suggest that the OB extends its function into the regulation of food intake and energy balance. Furthermore, numerous hormone receptors associated with appetite and metabolism are expressed within the OB, suggesting a neuroendocrine role outside the hypothalamus. Olfactory cues are important to promote food preparatory behaviours and consumption, such as enhancing appetite and salivation. In addition, altered metabolism or energy state (fasting, satiety and overnutrition) can change olfactory processing and perception. Similarly, various animal models and human pathologies indicate a strong link between olfactory impairment and metabolic dysfunction. Therefore, understanding the nature of this reciprocal relationship is critical to understand how olfactory or metabolic disorders arise. This present review elaborates on the connection between olfaction, feeding behaviour and metabolism and will shed light on the neuroendocrine role of the OB as an interface between the external and internal environments. Elucidating the specific mechanisms by which olfactory signals are integrated and translated into metabolic responses holds promise for the development of targeted therapeutic strategies and interventions aimed at modulating appetite and promoting metabolic health.
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Affiliation(s)
- Romana Stark
- Monash Biomedicine Discovery Institute and Department of Physiology, Monash University, Clayton, Victoria, Australia
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28
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Makizako H, Nakai Y, Akaida S, Taniguchi Y, Miwa T, Morimoto S. Association of Olfactory and Gustatory Function with Memory among Community-Dwelling Independent Older Adults. Ann Geriatr Med Res 2024; 28:178-183. [PMID: 38475663 PMCID: PMC11217661 DOI: 10.4235/agmr.23.0217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 03/04/2024] [Accepted: 03/08/2024] [Indexed: 03/14/2024] Open
Abstract
BACKGROUND This study examined the association between memory function and reduced olfactory and gustatory function among independent community-dwelling older adults. METHODS This cross-sectional study included 127 older adults (65.4% women). We assessed their memory, odor, and taste identification skills. Open essence (OE) test and taste strips (TS) were used to identify hyposmia (OE test ≤6) and hypogeusia (TS test ≤8), respectively. RESULTS Participants with severe hyposmia had significantly poorer memory functions compared to participants without severe hyposmia. After adjusting for covariates, multivariate logistic regression models revealed a significant association between immediate recognition performance and a decreased likelihood of severe hyposmia (odds ratio=0.65; 95% confidence interval 0.47-0.90). We observed no significant association between taste function and memory. CONCLUSION Memory function may be associated with olfactory impairment in older adults.
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Affiliation(s)
- Hyuma Makizako
- Department of Physical Therapy, School of Health Sciences, Kagoshima University, Kagoshima, Japan
| | - Yuki Nakai
- Department of Mechanical Systems Engineering, Faculty of Engineering, Daiichi Institute of Technology, Kagoshima, Japan
| | - Shoma Akaida
- Graduate School of Health Sciences, Kagoshima University, Kagoshima, Japan
| | - Yoshiaki Taniguchi
- Department of Rehabilitation, Faculty of Nursing and Welfare, Kyushu University of Nursing and Social Welfare, Tamana, Kumamoto, Japan
| | - Takaki Miwa
- Department of Otorhinolaryngology, Kanazawa Medical University, Uchinada, Ishikawa, Japan
| | - Shigeto Morimoto
- Center for Comprehensive Care on Memory Disorders, Kanazawa Medical University, Uchinada, Ishikawa, Japan
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29
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Alsaleh S, Alfallaj R, Almousa H, Alsubaie N, Akkielah Y, Mesallam TA, Sumaily I. Reliability and validity of the Arabic version of the brief version of the Questionnaire of Olfactory Disorders. Laryngoscope Investig Otolaryngol 2024; 9:e1252. [PMID: 38736942 PMCID: PMC11081420 DOI: 10.1002/lio2.1252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 04/08/2024] [Accepted: 04/13/2024] [Indexed: 05/14/2024] Open
Abstract
Background An accessible self-assessment questionnaire is needed to evaluate quality of life in olfactory dysfunction. The need to address this gap led to the development of the brief version of the Questionnaire of Olfactory Disorders (brief QOD), which holds particular value in the context of telemedicine. Objectives The aim of this study is to examine the reliability and validity of the Arabic brief QOD. Methods This study included 307 patients suffering from olfactory dysfunction as well as a control group filled a questionnaire including demographic information, the olfaction Visual Analog Scale (VAS), the Sino-nasal Outcome Test 22 (SNOT-22) questionnaire, and the Arabic version of the brief QOD. The Arabic brief QOD's reliability was assessed using Cronbach's α to measure internal consistency. To evaluate test-retest reliability, the intraclass correlation coefficient (ICC) was employed. The discriminative ability: score differences between the two groups were analyzed. The validity Arabic brief QOD was evaluated by comparing it to the olfaction VAS. Results The Cronbach's α coefficients were 0.757 for Questionnaire of Olfactory Disorders-Parosmia (QOD-P), 0.832 Questionnaire of Olfactory Disorders-quality of life (QOD-QoL), and 0.817 Questionnaire of Olfactory Disorders-visual analog scale (QOD-VAS). The reliability of the overall brief QOD was 0.93. The ICC exceeded the acceptable threshold of 0.7, indicating strong test-retest reliability. The highest correlation was observed between the SNOT-22 and QOD total scores (r = 0.552 and p < .001) as well as between SNOT-22 and QOD VAS (r = 0.512 and p < .001). Conclusion Excellent validity and reliability have been shown for the Arabic brief QOD as a self-assessment tool assessing quality of life among olfactory dysfunction patients. Level of evidence NA.
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Affiliation(s)
- Saad Alsaleh
- Department of Otolaryngology ‐ Head and Neck SurgeryKing Saud UniversityRiyadhKingdom of Saudi Arabia
| | - Rayan Alfallaj
- Department of Otolaryngology ‐ Head and Neck SurgeryKing Saud UniversityRiyadhKingdom of Saudi Arabia
| | - Hisham Almousa
- College of MedicineKing Saud UniversityRiyadhKingdom of Saudi Arabia
| | - Nawaf Alsubaie
- Department of Otolaryngology ‐ Head and Neck SurgeryKing Saud UniversityRiyadhKingdom of Saudi Arabia
| | - Yara Akkielah
- College of MedicineAlfaisal UniversityRiyadhKingdom of Saudi Arabia
| | - Tamer A. Mesallam
- Department of Otolaryngology ‐ Head and Neck SurgeryKing Saud UniversityRiyadhKingdom of Saudi Arabia
| | - Ibrahim Sumaily
- ENT DepartmentKing Fahd Central HospitalJazanKingdom of Saudi Arabia
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30
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Liu DT, Besser G, Moser V, Prem B, Sharma G, Ehrgott M, Renner B, Mueller CA. The olfactory diary: Tracking awareness and consciousness of the sense of smell throughout the day. Laryngoscope Investig Otolaryngol 2024; 9:e1268. [PMID: 38803460 PMCID: PMC11129550 DOI: 10.1002/lio2.1268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Revised: 04/17/2024] [Accepted: 04/28/2024] [Indexed: 05/29/2024] Open
Abstract
Objectives The aim of the present study was to follow the daily course of patients with olfactory dysfunction and healthy controls and to assess (i) how many times a day, (ii) at which time, and (iii) in which aspect of daily life participants are conscious about their sense of smell. Methods In this longitudinal study, 49 patients with smell loss and 30 healthy participants were enrolled. Olfactory function was assessed using the Sniffin' Sticks. All participants received paper diaries designed for a 14-day period, featuring 12 rows representing 12 daily hours and six columns for various daily life aspects. They were instructed to mark their awareness of smell by indicating the relevant row and column in the diary. Following the return of the diaries, a second olfactory test was conducted within the patient group. Results On average, patients were consciously aware of their sense of smell around 8 times daily, while healthy participants noted it about 6.5 times a day. Both groups primarily focused on their sense of smell during activities related to "eating," followed by considerations in "social life" and "personal hygiene." Interestingly, distinct patterns emerged: patients peaked in awareness at 8 a.m. and 7 p.m., whereas healthy individuals showed peaks at 6 a.m., 12 p.m., and 7 p.m. Despite regular diary use, we observed no improvement in patients' olfactory function or related quality of life. Conclusion The olfactory diary is a valuable tool unveiling individual smell awareness patterns in patients with smell loss, aiding in counseling and patient management. Level of Evidence 4.
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Affiliation(s)
- David T. Liu
- Department of Otorhinolaryngology, Head and Neck SurgeryMedical University of ViennaViennaAustria
| | - Gerold Besser
- Department of Otorhinolaryngology, Head and Neck SurgeryMedical University of ViennaViennaAustria
| | - Veronika Moser
- Department of Otorhinolaryngology, Head and Neck SurgeryMedical University of ViennaViennaAustria
| | - Bernhard Prem
- Department of Otorhinolaryngology, Head and Neck SurgeryMedical University of ViennaViennaAustria
| | - Gunjan Sharma
- Department of Otorhinolaryngology, Head and Neck SurgeryMedical University of ViennaViennaAustria
| | - Marie Ehrgott
- Department of Otorhinolaryngology, Head and Neck SurgeryMedical University of ViennaViennaAustria
| | - Bertold Renner
- Institute of Experimental and Clinical Pharmacology and Toxicology, Friedrich‐Alexander University Erlangen‐NürnbergErlangenGermany
- Institute of Clinical Pharmacology, Medical Faculty Carl Gustav Carus, Technical University of DresdenDresdenGermany
| | - Christian A. Mueller
- Department of Otorhinolaryngology, Head and Neck SurgeryMedical University of ViennaViennaAustria
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31
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Passali CG, Santantonio M, Passali D. The current possibilities of diagnosing and therapies for olfactory disorders. Expert Opin Pharmacother 2024; 25:973-983. [PMID: 38935483 DOI: 10.1080/14656566.2024.2368243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2024] [Accepted: 06/11/2024] [Indexed: 06/29/2024]
Abstract
INTRODUCTION Olfactory disorders significantly affect individuals, diminishing their capacity to detect dangers, appreciate flavors, and engage socially. Despite their considerable impact on quality of life, these disorders often receive less attention compared to other sensory impairments. This review emphasizes the importance of olfactory function and explores both traditional and innovative diagnostic and therapeutic approaches. AREAS COVERED This review comprehensively covers the pathophysiology, diagnostic challenges, and treatment options for olfactory disorders. It delves into the nuances of different disorders, such as anosmia and parosmia, and discusses the array of diagnostic tools from traditional sniff tests to advanced imaging techniques. The review also evaluates therapeutic strategies, from pharmacological treatments to emerging therapies like electrical stimulation and regenerative medicine, highlighting recent advances in the field. EXPERT OPINION Current insights suggest a growing recognition of the significance of olfactory disorders, driven by recent pandemics and advances in diagnostic and therapeutic technologies. Future perspectives indicate a promising direction toward more personalized medicine approaches and enhanced regenerative therapies. Continuous research and improved clinical awareness are critical for evolving the management strategies of olfactory impairments, potentially leading to better patient outcomes and quality of life enhancements.
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Affiliation(s)
- Cesare Giulio Passali
- Division of Otorhinolaryngology, Fondazione Policlinico Universitario A. Gemelli IRCCS, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Mariaconsiglia Santantonio
- Fondazione Policlinico Universitario A. Gemelli IRCCS, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Desiderio Passali
- IFOS Former President, ORL Head and Neck Surgery, University of Siena, Siena, Italy
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32
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Sienkiewicz-Oleszkiewicz B, Hummel T. Olfactory function in diabetes mellitus. J Clin Transl Endocrinol 2024; 36:100342. [PMID: 38585386 PMCID: PMC10997837 DOI: 10.1016/j.jcte.2024.100342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Revised: 03/18/2024] [Accepted: 03/29/2024] [Indexed: 04/09/2024] Open
Abstract
Diabetes mellitus (DM) is an increasingly common disease in both children and adults. In addition to neuronal and/or vascular disorders, it can cause chemosensory abnormalities including olfactory deterioration. The purpose of this article is to summarize current knowledge on olfactory function in DM, highlighting the impact of co-morbidities, especially obesity, thyroid dysfunction, chronic kidney disease and COVID-19 on olfactory outcomes. Research to date mostly shows that olfactory impairment is more common in people with diabetes than in the general population. In addition, the presence of concomitant diseases is a factor increasing olfactory impairment. Such a correlation was shown for type 1 diabetes, type 2 diabetes and gestational diabetes. At the same time, not only chronic diseases, but also DM in acute conditions such as COVID-19 leads to a higher prevalence of olfactory disorders during infection. Analyzing the existing literature, it is important to be aware of the limitations of published studies. These include the small number of patients studied, the lack of uniformity in the methods used to assess the sense of smell, frequently relying on rated olfactory function only, and the simultaneous analysis of patients with different types of diabetes, often without a clear indication of diabetes type. In addition, the number of available publications is small. Certainly, further research in this area is needed. From a practical point of view decreased olfactory performance may be an indicator for central neuropathy and an indication for assessing the patient's nutritional status, examining cognitive function, especially in older patients and performing additional diagnostic tests, such as checking thyroid function, because all those changes were correlated with smell deterioration.
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Affiliation(s)
- Beata Sienkiewicz-Oleszkiewicz
- Department of Clinical Pharmacology, Faculty of Pharmacy, Wroclaw Medical University, ul. Borowska 211a, 50-556 Wrocław, Poland
- Smell and Taste Clinic, Department of Otorhinolaryngology, Technical University Dresden, Fetscherstr. 74, 01307 Dresden, Germany
| | - Thomas Hummel
- Smell and Taste Clinic, Department of Otorhinolaryngology, Technical University Dresden, Fetscherstr. 74, 01307 Dresden, Germany
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Pieniak M, Tutar C, Jedryczka W, Benkhatar H, Debroise Blanchard-Dignac V, Haehner A, Hummel T. A practical test for retronasal odor identification based on aromatized tablets. J Neurosci Methods 2024; 406:110135. [PMID: 38583589 DOI: 10.1016/j.jneumeth.2024.110135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2024] [Revised: 03/17/2024] [Accepted: 04/03/2024] [Indexed: 04/09/2024]
Abstract
BACKGROUND Olfactory perceptions elicited by odors originating from within the body (retronasal olfaction) play a crucial role in well-being and are often disrupted in various medical conditions. However, the assessment of retronasal olfaction in research and the clinical practice is impeded by the lack of commercially available tests and limited standardization of existing testing materials. NEW METHOD The novel ThreeT retronasal odor identification test employs 20 flavored tablets that deliver a standardized amount of odorous stimuli. The items represent common food- and non-food-related odors. RESULTS The ThreeT test effectively distinguishes patients with olfactory dysfunction from healthy controls, achieving a specificity of 86% and sensitivity of 73%. Its scores remain stable for up to 3 months (r=.79). COMPARISON WITH EXISTING METHOD ThreeT test exhibits a strong correlation with "Tasteless powders" measure of retronasal olfaction (r=.78) and classifies people into healthy and patient groups with similar accuracy. Test-retest stability of ThreeT is slightly higher than the stability of "Tasteless powders" (r=.79 vs r=.74). CONCLUSIONS ThreeT is suitable for integration into scientific research and clinical practice to monitor retronasal odor identification abilities.
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Affiliation(s)
- Michal Pieniak
- Smell & Taste Clinic, Department of Otorhinolaryngology, Technische Universität Dresden, Fetscherstrasse 74, Dresden 01307, Germany; Institute of Psychology, University of Wroclaw, Wroclaw, Poland
| | - Can Tutar
- Smell & Taste Clinic, Department of Otorhinolaryngology, Technische Universität Dresden, Fetscherstrasse 74, Dresden 01307, Germany
| | - Wiktoria Jedryczka
- Smell & Taste Clinic, Department of Otorhinolaryngology, Technische Universität Dresden, Fetscherstrasse 74, Dresden 01307, Germany; Institute of Psychology, University of Wroclaw, Wroclaw, Poland
| | - Hakim Benkhatar
- Centre Hospitalier de Versailles, Service ORL et Chirurgie Cervico-Faciale, Le Chesnay-Rocquencourt, France
| | | | - Antje Haehner
- Smell & Taste Clinic, Department of Otorhinolaryngology, Technische Universität Dresden, Fetscherstrasse 74, Dresden 01307, Germany
| | - Thomas Hummel
- Smell & Taste Clinic, Department of Otorhinolaryngology, Technische Universität Dresden, Fetscherstrasse 74, Dresden 01307, Germany.
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Brabahar BS, Kurien R, Panicker R, Rebekah G, Varghese L. Threshold and suprathreshold component analysis in olfactory dysfunction: a retrospective study. J Laryngol Otol 2024; 138:647-651. [PMID: 38058015 DOI: 10.1017/s0022215123002268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/08/2023]
Abstract
OBJECTIVE To analyse variations in the n-butanol threshold and odour identification scores of the Connecticut Chemosensory Clinical Research Centre test in various grades of olfactory dysfunction and in different nasal conditions leading to olfactory loss. METHOD Retrospective observational study. RESULTS All grades of olfactory dysfunction were predominantly noted among males. In chronic rhinosinusitis, anosmia or severe hyposmia was seen in 87.5 per cent of patients without polyps in comparison with 68 per cent of patients with polyps. In addition, 90 per cent of patients with atrophic rhinitis and post-traumatic loss had anosmia, but only 30.7 per cent of patients with allergic rhinitis had anosmia. Pepper was the most affected smell for all the nasal diseases except atrophic rhinitis, in which asafoetida and baby powder smells were affected more. CONCLUSION In most inflammatory sinonasal conditions, odour identification is relatively preserved even when the threshold is maximally affected. In patients with comparable olfactory dysfunction based on the Connecticut Chemosensory Clinical Research Centre test score, a relatively preserved suprathreshold odour identification score may predict better prognosis.
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Affiliation(s)
| | - Regi Kurien
- Department of Otorhinolaryngology, Christian Medical College, Vellore, India
| | - Raga Panicker
- Department of Otorhinolaryngology, Christian Medical College, Vellore, India
| | - Grace Rebekah
- Department of Biostatistics, Christian Medical College, Vellore, India
| | - Lalee Varghese
- Department of Otorhinolaryngology, Christian Medical College, Vellore, India
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Riva G, Pecorari G, Motatto GM, Rivero M, Canale A, Albera R, Albera A. Validation and reliability of the Italian version of the Self-reported Mini Olfactory Questionnaire (Self-MOQ). ACTA OTORHINOLARYNGOLOGICA ITALICA : ORGANO UFFICIALE DELLA SOCIETA ITALIANA DI OTORINOLARINGOLOGIA E CHIRURGIA CERVICO-FACCIALE 2024; 44:192-197. [PMID: 38712517 PMCID: PMC11166215 DOI: 10.14639/0392-100x-n2386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Accepted: 10/15/2023] [Indexed: 05/08/2024]
Abstract
Objective Olfactory dysfunction (OD) represents a frequent complaint in general population and especially in patients with chronic sinonasal diseases. The aim of this study was the cross-cultural adaptation and validation of the Self-reported Mini Olfactory Questionnaire (Self-MOQ) into Italian. Methods One hundred fifty patients affected by chronic sinonasal diseases and reporting hyposmia were enrolled. Other 150 normosmic subjects without inflammatory or neoplastic sinonasal disorders were used as a control group. The Short-form 36 (SF-36) questionnaire was used for clinical validity. Results Cronbach's alpha coefficient was 0.825. The test-retest reliability was excellent. The good correlation between the Self-MOQ and the Visual Analogue Scale scores (p < 0.05) demonstrated the construct validity of the questionnaire. The Self-MOQ was able to distinguish between subjects with or without OD (p < 0.05). Higher Self-MOQ score was found in case of nasal obstruction and posterior rhinorrhoea (p < 0.05). Self-MOQ showed significant correlation with SF-36 general health, SF-36 role functioning/physical, and SF-36 pain (p < 0.05). Conclusions The Italian version of the Self-MOQ showed good internal consistency, test-retest reliability, construct, and clinical validity.
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Affiliation(s)
- Giuseppe Riva
- Division of Otorhinolaryngology, Department of Surgical Sciences, University of Turin, Turin, Italy
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Kaheni H, Shiran MB, Kamrava SK, Zare-Sadeghi A. Intra and inter-regional functional connectivity of the human brain due to Task-Evoked fMRI Data classification through CNN & LSTM. J Neuroradiol 2024; 51:101188. [PMID: 38408721 DOI: 10.1016/j.neurad.2024.02.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 01/27/2024] [Accepted: 02/21/2024] [Indexed: 02/28/2024]
Abstract
BACKGROUND AND PURPOSE Olfaction is an early marker of neurodegenerative disease. Standard olfactory function is essential due to the importance of olfaction in human life. The psychophysical evaluation assesses the olfactory function commonly. It is patient-reported, and results rely on the patient's answers and collaboration. However, methodological difficulties attributed to the psychophysical evaluation of olfactory-related cerebral areas led to limited assessment of olfactory function in the human brain. MATERIALS AND METHODS The current study utilized clustering approaches to assess olfactory function in fMRI data and used brain activity to parcellate the brain with homogeneous properties. Deep neural network architecture based on ResNet convolutional neural networks (CNN) and Long Short-Term Model (LSTM) designed to classify healthy with olfactory disorders subjects. RESULTS The fMRI result obtained by k-means unsupervised machine learning model was within the expected outcome and similar to those found with the conn toolbox in detecting active areas. There was no significant difference between the means of subjects and every subject. Proposing a CRNN deep learning model to classify fMRI data in two different healthy and with olfactory disorders groups leads to an accuracy score of 97 %. CONCLUSIONS The K-means unsupervised algorithm can detect the active regions in the brain and analyze olfactory function. Classification results prove the CNN-LSTM architecture using ResNet provides the best accuracy score in olfactory fMRI data. It is the first attempt conducted on olfactory fMRI data in detail until now.
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Affiliation(s)
- Haniyeh Kaheni
- Finetech in Medicine Research Center, Department of Medical Physics, School of Medicine, Iran University of Medical Sciences (IUMS), Tehran, Iran
| | - Mohammad Bagher Shiran
- Finetech in Medicine Research Center, Department of Medical Physics, School of Medicine, Iran University of Medical Sciences (IUMS), Tehran, Iran
| | - Seyed Kamran Kamrava
- ENT and Head and Neck Research Center and Department, The Five Senses Health Institute, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Arash Zare-Sadeghi
- Finetech in Medicine Research Center, Department of Medical Physics, School of Medicine, Iran University of Medical Sciences (IUMS), Tehran, Iran.
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Sanna F, Castelli MP, Mostallino R, Loy F, Masala C. Correlations between Gustatory, Olfactory, Cognitive Function, and Age in Healthy Women. Nutrients 2024; 16:1731. [PMID: 38892664 PMCID: PMC11175123 DOI: 10.3390/nu16111731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Revised: 05/22/2024] [Accepted: 05/29/2024] [Indexed: 06/21/2024] Open
Abstract
Aging is a progressive physiological degeneration associated with a decline in chemosensory processes and cognitive abilities and a reduction in synaptic plasticity. The biological bases of ageing are still not completely understood, and many theories have been proposed. This study aimed to evaluate the occurrence of age-related changes affecting the chemosensory function (gustatory and olfactory) and general cognitive abilities and their potential associations in women. To this aim, 319 women (the age ranging from 18 to 92 years) were recruited and divided into four different age groups: 18-34 years, 35-49 years, 50-64 years, and ≥65 years. Our results confirmed that in women, gustatory, olfactory, and cognitive functions decline, though in a different manner during aging. Olfactory and cognitive function showed a slight decline along the first three age classes, with a dramatic decrease after age 65 years, while gustatory function decreased more gradually. Olfactory and gustatory deficits may have a high degree of predictivity for general cognitive function as well as for specific cognitive subdomains such as visuospatial/executive abilities, language, memory, and attention. Our study highlighted the importance of using chemosensory assessments for the early diagnosis of cognitive decline and for the development of appropriate personalized risk prevention strategies.
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Affiliation(s)
- Fabrizio Sanna
- Department of Biomedical Sciences, University of Cagliari, Cittadella Universitaria, SP 8 Monserrato, 09042 Cagliari, Italy; (M.P.C.); (R.M.); (F.L.); (C.M.)
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Loughnane M, Tischler V, Khalid Saifeldeen R, Kontaris E. Aging and Olfactory Training: A Scoping Review. Innov Aging 2024; 8:igae044. [PMID: 38881614 PMCID: PMC11176978 DOI: 10.1093/geroni/igae044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Indexed: 06/18/2024] Open
Abstract
Background and Objectives Decreased olfactory function commonly occurs alongside the aging process. Research suggests olfactory training (OT) has the potential to improve olfactory and cognitive function in individuals with and without olfactory dysfunction. The degree to which these benefits extend into older age and among those with cognitive impairment (i.e., people with dementia and mild cognitive impairment) is less clear. The purpose of the current review was to investigate the extent to which OT affects olfactory function, cognition, and well-being among older people. Research Design and Methods A scoping review of the literature was conducted in PubMed, Embase, EbscoHost, and SCOPUS. Articles were considered eligible for original research studies with human populations, included adults aged 55 and older, performed any type of OT, and included a form of olfactory testing. The data from the included studies were synthesized and presented narratively. Results A total of 23 studies were included. The results suggest that OT provides multiple benefits to older adults, including those with cognitive impairment. Particularly, OT was associated with measurable changes in olfactory function, improved cognitive function, specifically semantic verbal fluency and working memory, reduced depressive symptoms, and protection from cognitive decline. Discussion and Implications The findings suggest that benefits from OT extend beyond changes in olfactory function and include improved cognitive function, amelioration of depressive symptoms, and protection from cognitive decline. Future research is needed across specific participant groups, including those with differentiated types of dementia, to investigate the olfactory and cognitive benefits of OT.
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Affiliation(s)
| | | | | | - Emily Kontaris
- Health and Well-Being Centre of Excellence, Givaudan UK Limited, Ashford, UK
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Murata K, Maegawa A, Imoto Y, Fujieda S, Fukazawa Y. Endogenous opioids in the olfactory tubercle and their roles in olfaction and quality of life. Front Neural Circuits 2024; 18:1408189. [PMID: 38872907 PMCID: PMC11170707 DOI: 10.3389/fncir.2024.1408189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Accepted: 05/06/2024] [Indexed: 06/15/2024] Open
Abstract
Olfactory dysfunctions decrease daily quality of life (QOL) in part by reducing the pleasure of eating. Olfaction plays an essential role in flavor sensation and palatability. The decreased QOL due to olfactory dysfunction is speculated to result from abnormal neural activities in the olfactory and limbic areas of the brain, as well as peripheral odorant receptor dysfunctions. However, the specific underlying neurobiological mechanisms remain unclear. As the olfactory tubercle (OT) is one of the brain's regions with high expression of endogenous opioids, we hypothesize that the mechanism underlying the decrease in QOL due to olfactory dysfunction involves the reduction of neural activity in the OT and subsequent endogenous opioid release in specialized subregions. In this review, we provide an overview and recent updates on the OT, the endogenous opioid system, and the pleasure systems in the brain and then discuss our hypothesis. To facilitate the effective treatment of olfactory dysfunctions and decreased QOL, elucidation of the neurobiological mechanisms underlying the pleasure of eating through flavor sensation is crucial.
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Affiliation(s)
- Koshi Murata
- Division of Brain Structure and Function, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
- Life Science Innovation Center, University of Fukui, Fukui, Japan
| | - Ayako Maegawa
- Division of Brain Structure and Function, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
- Life Science Innovation Center, University of Fukui, Fukui, Japan
- Department of Otorhinolaryngology-Head and Neck Surgery, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - Yoshimasa Imoto
- Life Science Innovation Center, University of Fukui, Fukui, Japan
- Department of Otorhinolaryngology-Head and Neck Surgery, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - Shigeharu Fujieda
- Department of Otorhinolaryngology-Head and Neck Surgery, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
| | - Yugo Fukazawa
- Division of Brain Structure and Function, Faculty of Medical Sciences, University of Fukui, Fukui, Japan
- Life Science Innovation Center, University of Fukui, Fukui, Japan
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Bratman GN, Bembibre C, Daily GC, Doty RL, Hummel T, Jacobs LF, Kahn PH, Lashus C, Majid A, Miller JD, Oleszkiewicz A, Olvera-Alvarez H, Parma V, Riederer AM, Sieber NL, Williams J, Xiao J, Yu CP, Spengler JD. Nature and human well-being: The olfactory pathway. SCIENCE ADVANCES 2024; 10:eadn3028. [PMID: 38748806 DOI: 10.1126/sciadv.adn3028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 04/12/2024] [Indexed: 07/04/2024]
Abstract
The world is undergoing massive atmospheric and ecological change, driving unprecedented challenges to human well-being. Olfaction is a key sensory system through which these impacts occur. The sense of smell influences quality of and satisfaction with life, emotion, emotion regulation, cognitive function, social interactions, dietary choices, stress, and depressive symptoms. Exposures via the olfactory pathway can also lead to (anti-)inflammatory outcomes. Increased understanding is needed regarding the ways in which odorants generated by nature (i.e., natural olfactory environments) affect human well-being. With perspectives from a range of health, social, and natural sciences, we provide an overview of this unique sensory system, four consensus statements regarding olfaction and the environment, and a conceptual framework that integrates the olfactory pathway into an understanding of the effects of natural environments on human well-being. We then discuss how this framework can contribute to better accounting of the impacts of policy and land-use decision-making on natural olfactory environments and, in turn, on planetary health.
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Affiliation(s)
- Gregory N Bratman
- School of Environmental and Forest Sciences, University of Washington, Seattle, WA 98195, USA
- Department of Psychology, University of Washington, Seattle, WA 98195, USA
- Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, WA 98195, USA
| | - Cecilia Bembibre
- Institute for Sustainable Heritage, University College London, London, UK
| | - Gretchen C Daily
- Natural Capital Project, Stanford University, Stanford, CA 94305, USA
- Department of Biology, Stanford University, Stanford, CA 94305, USA
- Woods Institute, Stanford University, Stanford, CA 94305, USA
| | - Richard L Doty
- Smell and Taste Center, Department of Otorhinolaryngology: Head and Neck Surgery, University of Pennsylvania Perelman School of Medicine, Hospital of the University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Thomas Hummel
- Interdisciplinary Center Smell and Taste, Department of Otorhinolaryngology, Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Lucia F Jacobs
- Department of Psychology, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Peter H Kahn
- School of Environmental and Forest Sciences, University of Washington, Seattle, WA 98195, USA
- Department of Psychology, University of Washington, Seattle, WA 98195, USA
| | - Connor Lashus
- School of Environmental and Forest Sciences, University of Washington, Seattle, WA 98195, USA
| | - Asifa Majid
- Department of Experimental Psychology, University of Oxford, Oxford, UK
| | | | - Anna Oleszkiewicz
- Interdisciplinary Center Smell and Taste, Department of Otorhinolaryngology, Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
- Institute of Psychology, University of Wroclaw, Wrocław, Poland
| | | | | | - Anne M Riederer
- Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, WA 98195, USA
| | - Nancy Long Sieber
- T.H. Chan School of Public Health, Harvard University, Boston, MA 02115, USA
| | - Jonathan Williams
- Air Chemistry Department, Max Planck Institute for Chemistry, 55128 Mainz, Germany
- Climate and Atmosphere Research Center, The Cyprus Institute, Nicosia, Cyprus
| | - Jieling Xiao
- College of Architecture, Birmingham City University, Birmingham, UK
| | - Chia-Pin Yu
- School of Forestry and Resource Conservation, National Taiwan University, Taiwan
- The Experimental Forest, College of Bio-Resources and Agriculture, National Taiwan University, Taiwan
| | - John D Spengler
- T.H. Chan School of Public Health, Harvard University, Boston, MA 02115, USA
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Okrzeja J, Sołomacha S, Alimowski M, Sowa P, Dubatówka M, Łapińska M, Kiszkiel Ł, Szczerbiński Ł, Laskowski PP, Czupryna P, Kubas B, Garkowski A, Kamiński KA, Moniuszko-Malinowska A. Assessment of smell disturbances 6 months after COVID-19 in Polish population. Sci Rep 2024; 14:11251. [PMID: 38755270 PMCID: PMC11099038 DOI: 10.1038/s41598-024-62114-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2023] [Accepted: 05/14/2024] [Indexed: 05/18/2024] Open
Abstract
Considering the frequency and severity of olfactory disorders associated with SARS-CoV-2 infection, attention to the olfactory loss has expanded. The aim of our study was to assess of smell disturbances 6 months after COVID-19. The study population consisted of 2 groups: 196 Post-COVID-19 patients who were hospitalized because of COVID-19, control sample-130 patients without reported smell disorders from general population-Bialystok PLUS study. People from both groups were asked to participate in the Sniffin Sticks Test (half year after the disease). Sniffin Sticks Test consisted of 12 standardized smell samples. The participant's test score was counted based on correct scent recognition. Middle/older age was related with lower likelihood of olfaction recovery. The biggest differences in recognition of particular fragrances were observed for: orange and lemon, lemon and coffee (p.adj < 0.001). Patients had the greatest problem in assessing smell of lemon. The comparison of scores between Delta, Omicron, Wild Type, Wild Type Alpha waves showed statistically significant difference between Delta and Wild Type waves (p = 0.006). Duration of the disease (r = 0.218), age (r = -0.253), IL-6 (r = -0.281) showed significant negative correlations with the score. Statistically significant variables in the case of smell disorders were Omicron wave (CI = 0.045-0.902; P = 0.046) and Wild Type wave (CI = 0.135-0.716; P = 0.007) compared to Delta wave reference. Moreover, patients with PLT count below 150 000/μl had greater olfactory disorders than those with PLT count over 150 000/μl. There are: smell differences between post-COVID-19 patients and healthy population; statistically significant difference between Delta and Wild Type waves in Post-COVID-19 group in score of the Sniffin Sticks Test. Smell disturbances depend on the age, cognitive impairments, clinical characteristics of the COVID-19 disease and sex of the patient.
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Affiliation(s)
- Jakub Okrzeja
- Medical University of Bialystok, Żurawia 14, 15-540, Bialystok, Poland.
| | - Sebastian Sołomacha
- Department of Population Medicine and Lifestyle Diseases Prevention, Medical University of Bialystok, Białystok, Poland
| | - Maciej Alimowski
- Doctoral School of Social Sciences, University of Bialystok, Białystok, Poland
| | - Paweł Sowa
- Department of Population Medicine and Lifestyle Diseases Prevention, Medical University of Bialystok, Białystok, Poland
| | - Marlena Dubatówka
- Department of Population Medicine and Lifestyle Diseases Prevention, Medical University of Bialystok, Białystok, Poland
| | - Magda Łapińska
- Department of Population Medicine and Lifestyle Diseases Prevention, Medical University of Bialystok, Białystok, Poland
| | - Łukasz Kiszkiel
- Society and Cognition Unit, University of Bialystok, Białystok, Poland
| | - Łukasz Szczerbiński
- Clinical Research Centre, Medical University of Bialystok, Białystok, Poland
- Department of Endocrinology, Diabetology and Internal Medicine, Medical University of Bialystok, Białystok, Poland
| | | | - Piotr Czupryna
- Department of Infectious Diseases and Neuroinfections, Medical University of Bialystok, Białystok, Poland
| | - Bożena Kubas
- Department of Radiology, Medical University of Bialystok, Białystok, Poland
| | - Adam Garkowski
- Department of Radiology, Medical University of Bialystok, Białystok, Poland
| | - Karol Adam Kamiński
- Department of Population Medicine and Lifestyle Diseases Prevention, Medical University of Bialystok, Białystok, Poland
| | - Anna Moniuszko-Malinowska
- Department of Infectious Diseases and Neuroinfections, Medical University of Bialystok, Białystok, Poland
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Menger NS, Tognetti A, Farruggia MC, Mucignat C, Bhutani S, Cooper KW, Rohlfs Domínguez P, Heinbockel T, Shields VDC, D'Errico A, Pereda-Loth V, Pierron D, Koyama S, Croijmans I. Giving a Voice to Patients With Smell Disorders Associated With COVID-19: Cross-Sectional Longitudinal Analysis Using Natural Language Processing of Self-Reports. JMIR Public Health Surveill 2024; 10:e47064. [PMID: 38728069 PMCID: PMC11127136 DOI: 10.2196/47064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 10/26/2023] [Accepted: 03/11/2024] [Indexed: 05/12/2024] Open
Abstract
BACKGROUND Smell disorders are commonly reported with COVID-19 infection. The smell-related issues associated with COVID-19 may be prolonged, even after the respiratory symptoms are resolved. These smell dysfunctions can range from anosmia (complete loss of smell) or hyposmia (reduced sense of smell) to parosmia (smells perceived differently) or phantosmia (smells perceived without an odor source being present). Similar to the difficulty that people experience when talking about their smell experiences, patients find it difficult to express or label the symptoms they experience, thereby complicating diagnosis. The complexity of these symptoms can be an additional burden for patients and health care providers and thus needs further investigation. OBJECTIVE This study aims to explore the smell disorder concerns of patients and to provide an overview for each specific smell disorder by using the longitudinal survey conducted in 2020 by the Global Consortium for Chemosensory Research, an international research group that has been created ad hoc for studying chemosensory dysfunctions. We aimed to extend the existing knowledge on smell disorders related to COVID-19 by analyzing a large data set of self-reported descriptive comments by using methods from natural language processing. METHODS We included self-reported data on the description of changes in smell provided by 1560 participants at 2 timepoints (second survey completed between 23 and 291 days). Text data from participants who still had smell disorders at the second timepoint (long-haulers) were compared with the text data of those who did not (non-long-haulers). Specifically, 3 aims were pursued in this study. The first aim was to classify smell disorders based on the participants' self-reports. The second aim was to classify the sentiment of each self-report by using a machine learning approach, and the third aim was to find particular food and nonfood keywords that were more salient among long-haulers than those among non-long-haulers. RESULTS We found that parosmia (odds ratio [OR] 1.78, 95% CI 1.35-2.37; P<.001) as well as hyposmia (OR 1.74, 95% CI 1.34-2.26; P<.001) were more frequently reported in long-haulers than in non-long-haulers. Furthermore, a significant relationship was found between long-hauler status and sentiment of self-report (P<.001). Finally, we found specific keywords that were more typical for long-haulers than those for non-long-haulers, for example, fire, gas, wine, and vinegar. CONCLUSIONS Our work shows consistent findings with those of previous studies, which indicate that self-reports, which can easily be extracted online, may offer valuable information to health care and understanding of smell disorders. At the same time, our study on self-reports provides new insights for future studies investigating smell disorders.
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Affiliation(s)
- Nick S Menger
- Institute of Medical Psychology and Behavioural Neurobiology, University of Tübingen, Tübingen, Germany
| | - Arnaud Tognetti
- Department of Clinical Neuroscience, Division of Psychology, Karolinska Institutet, Stockholm, Sweden
- Centre d'Economie de l'Environnement Montpellier, Centre National de la Recherche Scientifique, Institut National de Recherche pour l'Agriculture l'Alimentation et l'Environnement, Institut Agro, Université de Montpellier, Montpellier, France
| | - Michael C Farruggia
- Interdepartmental Neuroscience Program, Yale University, New Haven, CT, United States
| | - Carla Mucignat
- Department of Molecular Medicine, University of Padova, Padua, Italy
| | - Surabhi Bhutani
- School of Exercise and Nutritional Sciences, San Diego State University, San Diego, CA, United States
| | - Keiland W Cooper
- Department of Neurobiology and Behavior, University of California, Irvine, CA, United States
| | - Paloma Rohlfs Domínguez
- Department of Developmental and Educational Psychology, University of Basque Country, Leioa, Spain
| | - Thomas Heinbockel
- Department of Anatomy, Howard University College of Medicine, Washington, DC, United States
| | - Vonnie D C Shields
- Biological Sciences Department, Fisher College of Science and Mathematics, Towson University, Towson, MD, United States
| | - Anna D'Errico
- Goethe University of Frankfurt, Frankfurt am Main, Germany
| | | | - Denis Pierron
- Laboratoire Évolution et Santé Orale, Université Toulouse III, Toulouse, France
| | - Sachiko Koyama
- Department of Medicine, School of Medicine, Indiana University, Indianapolis, IN, United States
| | - Ilja Croijmans
- Language and Communication Department, Faculty of Arts, Radboud University, Nijmegen, Netherlands
- Centre for Language Studies, Radboud University, Nijmegen, Netherlands
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Stanley HB, Pereda-Campos V, Mantel M, Rouby C, Daudé C, Aguera PE, Fornoni L, Hummel T, Weise S, Mignot C, Konstantinidis I, Garefis K, Ferdenzi C, Pierron D, Bensafi M. Identification of the needs of individuals affected by COVID-19. COMMUNICATIONS MEDICINE 2024; 4:83. [PMID: 38724573 PMCID: PMC11082167 DOI: 10.1038/s43856-024-00510-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 04/25/2024] [Indexed: 05/12/2024] Open
Abstract
BACKGROUND The optimal management of COVID-19 symptoms and their sequelae remains an important area of clinical research. Policy makers have little scientific data regarding the effects on the daily life of affected individuals and the identification of their needs. Such data are needed to inform effective care policy. METHODS We studied 639 people with COVID-19 resident in France via an online questionnaire. They reported their symptoms, effects on daily life, and resulting needs, with particular focus on olfaction. RESULTS The results indicate that a majority of participants viewed their symptoms as disabling, with symptoms affecting their physical and mental health, social and professional lives. 60% of the individuals reported having unmet medical, psychological and socio-professional support needs. Finally, affected individuals were concerned about the risk and invasiveness of possible treatments as shown by a preference for non-invasive intervention over surgery to cure anosmia. CONCLUSIONS It is important that policy makers take these needs into consideration in order to assist affected individuals to regain a normal quality of life.
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Affiliation(s)
- Halina B Stanley
- Université Claude Bernard Lyon 1, CNRS, INSERM, Centre de Recherche en Neurosciences de Lyon CRNL U1028 UMR5292, NEUROPOP, F-69500, Bron, France.
| | - Veronica Pereda-Campos
- Équipe de Médecine Evolutive Faculté de chirurgie dentaire-UMR5288, CNRS/Université Paul-Sabatier Toulouse III, Toulouse, 31400, France
| | - Marylou Mantel
- Université Claude Bernard Lyon 1, CNRS, INSERM, Centre de Recherche en Neurosciences de Lyon CRNL U1028 UMR5292, NEUROPOP, F-69500, Bron, France
- Équipe de Médecine Evolutive Faculté de chirurgie dentaire-UMR5288, CNRS/Université Paul-Sabatier Toulouse III, Toulouse, 31400, France
| | - Catherine Rouby
- Université Claude Bernard Lyon 1, CNRS, INSERM, Centre de Recherche en Neurosciences de Lyon CRNL U1028 UMR5292, NEUROPOP, F-69500, Bron, France
| | - Christelle Daudé
- Université Claude Bernard Lyon 1, CNRS, INSERM, Centre de Recherche en Neurosciences de Lyon CRNL U1028 UMR5292, NEUROPOP, F-69500, Bron, France
| | - Pierre-Emmanuel Aguera
- Université Claude Bernard Lyon 1, CNRS, INSERM, Centre de Recherche en Neurosciences de Lyon CRNL U1028 UMR5292, NEUROPOP, F-69500, Bron, France
| | - Lesly Fornoni
- Université Claude Bernard Lyon 1, CNRS, INSERM, Centre de Recherche en Neurosciences de Lyon CRNL U1028 UMR5292, NEUROPOP, F-69500, Bron, France
| | - Thomas Hummel
- Smell & Taste Clinic, Department of Otorhinlaryngology, Technische Universität Dresden, Dresden, Germany
| | - Susanne Weise
- Smell & Taste Clinic, Department of Otorhinlaryngology, Technische Universität Dresden, Dresden, Germany
| | - Coralie Mignot
- Smell & Taste Clinic, Department of Otorhinlaryngology, Technische Universität Dresden, Dresden, Germany
| | - Iordanis Konstantinidis
- 2nd Academic ORL Department, Papageorgiou Hospital, Aristotle University, Thessaloniki, Greece
| | - Konstantinos Garefis
- 2nd Academic ORL Department, Papageorgiou Hospital, Aristotle University, Thessaloniki, Greece
| | - Camille Ferdenzi
- Université Claude Bernard Lyon 1, CNRS, INSERM, Centre de Recherche en Neurosciences de Lyon CRNL U1028 UMR5292, NEUROPOP, F-69500, Bron, France
| | - Denis Pierron
- Équipe de Médecine Evolutive Faculté de chirurgie dentaire-UMR5288, CNRS/Université Paul-Sabatier Toulouse III, Toulouse, 31400, France
| | - Moustafa Bensafi
- Université Claude Bernard Lyon 1, CNRS, INSERM, Centre de Recherche en Neurosciences de Lyon CRNL U1028 UMR5292, NEUROPOP, F-69500, Bron, France.
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Cabrera CI, Hicks K, Rodriguez K, Gerka Stuyt JA, McComsey GA, D'Anza B. Comparison of the incidence of smell and taste disorders between influenza and COVID-19. Am J Otolaryngol 2024; 45:104176. [PMID: 38157588 DOI: 10.1016/j.amjoto.2023.104176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Accepted: 12/05/2023] [Indexed: 01/03/2024]
Abstract
OBJECTIVE Smell and taste disorders among patients with COVID-19 has become increasingly reported in the literature, however the prevalence varies. Post-infectious respiratory dysfunction has also been linked to influenza. In this study, we aimed to compare the rates of smell and taste disorders between COVID-19 and Influenza in unvaccinated patients. STUDY DESIGN Retrospective cohort study. SETTING TriNetX research network. METHODS Two queries were made on 7/1/2023 to include Influenza without a diagnosis of COVID-19 and a COVID-19 without a diagnosis of Influenza. The queries included patients from January 1 to December 31, 2022 from 102 Healthcare Organizations. The resultant population of patients with ICD-10 codes for COVID-19 and Influenza were matched using demographic characteristics to evaluate the risk of smell disorders. RESULTS The overall 3-month incidence of smell and taste disorders was 0.73 % in the COVID-19 population and 0.1 % in the influenza population. The 3-month matched risk ratios were 11.1 [95 % CI (8.8,13.8)]; p < 0.001) times higher for disorders of the smell and taste secondary to COVID-19 compared to influenza. CONCLUSIONS Disorders of the smell and taste are more common among patients with COVID-19 compared to patients with Influenza. Beyond smell loss, patients experience additional nasal and sinus-related rhinological symptoms, pointing to COVID-19's and influenza's wider impact on overall rhinological health. We believe that due to the transient nature of these disorders, they might go underreported.
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Affiliation(s)
- Claudia I Cabrera
- Department of Otolaryngology-Head and Neck Surgery, University Hospitals Cleveland Medical Center, Cleveland, OH, USA; Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - Kayla Hicks
- Department of Otolaryngology-Head and Neck Surgery, University Hospitals Cleveland Medical Center, Cleveland, OH, USA; Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - Kenneth Rodriguez
- Department of Otolaryngology-Head and Neck Surgery, University Hospitals Cleveland Medical Center, Cleveland, OH, USA; Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - John A Gerka Stuyt
- Department of Otolaryngology-Head and Neck Surgery, University Hospitals Cleveland Medical Center, Cleveland, OH, USA; Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - Grace A McComsey
- Case Western Reserve University School of Medicine, Cleveland, OH, USA; Center for Clinical Research, University Hospitals Cleveland Medical Center, Cleveland, OH, USA; Department of Infectious Diseases, University Hospitals Cleveland Medical Center, Cleveland, OH, USA
| | - Brian D'Anza
- Department of Otolaryngology-Head and Neck Surgery, University Hospitals Cleveland Medical Center, Cleveland, OH, USA; Case Western Reserve University School of Medicine, Cleveland, OH, USA. Brian.D'
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45
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Drummond J, Makdani A, Pawling R, Walker SC. Congenital Anosmia and Facial Emotion Recognition. Physiol Behav 2024; 278:114519. [PMID: 38490365 DOI: 10.1016/j.physbeh.2024.114519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 03/11/2024] [Accepted: 03/13/2024] [Indexed: 03/17/2024]
Abstract
Major functions of the olfactory system include guiding ingestion and avoidance of environmental hazards. People with anosmia report reliance on others, for example to check the edibility of food, as their primary coping strategy. Facial expressions are a major source of non-verbal social information that can be used to guide approach and avoidance behaviour. Thus, it is of interest to explore whether a life-long absence of the sense of smell heightens sensitivity to others' facial emotions, particularly those depicting threat. In the present, online study 28 people with congenital anosmia (mean age 43.46) and 24 people reporting no olfactory dysfunction (mean age 42.75) completed a facial emotion recognition task whereby emotionally neutral faces (6 different identities) morphed, over 40 stages, to express one of 5 basic emotions: anger, disgust, fear, happiness, or sadness. Results showed that, while the groups did not differ in their ability to identify the final, full-strength emotional expressions, nor in the accuracy of their first response, the congenital anosmia group successfully identified the emotions at significantly lower intensity (i.e. an earlier stage of the morph) than the control group. Exploratory analysis showed this main effect was primarily driven by an advantage in detecting anger and disgust. These findings indicate the absence of a functioning sense of smell during development leads to compensatory changes in visual, social cognition. Future work should explore the neural and behavioural basis for this advantage.
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Affiliation(s)
- James Drummond
- Research Centre for Brain & Behaviour, School of Psychology, Faculty of Health, Liverpool John Moores University, Liverpool, UK
| | - Adarsh Makdani
- Research Centre for Brain & Behaviour, School of Psychology, Faculty of Health, Liverpool John Moores University, Liverpool, UK
| | - Ralph Pawling
- Research Centre for Brain & Behaviour, School of Psychology, Faculty of Health, Liverpool John Moores University, Liverpool, UK
| | - Susannah C Walker
- Research Centre for Brain & Behaviour, School of Psychology, Faculty of Health, Liverpool John Moores University, Liverpool, UK.
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46
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Tholin L, Rumeau C, Jankowski R, Gallet P, Wen Hsieh J, Nguyen DT. Experience of French patients with olfactory disorders. Eur Ann Otorhinolaryngol Head Neck Dis 2024; 141:139-145. [PMID: 38431458 DOI: 10.1016/j.anorl.2024.02.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2024]
Abstract
OBJECTIVES To assess the experience of subjects with olfactory disorders in their daily life and medical management, and their expectations and proposals for improvement. MATERIAL AND METHODS A cross-sectional observational study was conducted over the period January 2020 to December 2021, with 300 subjects with olfactory disorders: 222 female, 78 male; mean age 46±15 years. In total, 126 were patients consulting in ENT, and 174 were members of the Anosmie.org patients' association. Participants filled out a questionnaire; free texts were analyzed thematically and coded for various qualitative variables. RESULTS Olfactory disorders considerably impacted health, safety and quality of life. Non-COVID-19 acute etiologies (non-COVID-19 viral infection, cranial trauma) showed particularly high risk of psychological, social, safety-related and nutritional consequences. Almost all patients (94%) were dissatisfied with their medical management: 28% had received little explanation, and 23% felt their dysosmia was completely neglected, with no exploration and no etiology suggested. Patients wished above all to have follow-up and accompaniment. CONCLUSION Despite significant impact on health and quality of life, olfactory disorders are neglected by the medical community. Patients should be given an ENT assessment with olfactometry, to establish diagnosis and prognosis. Global multidisciplinary management is necessary, including therapeutic education, and psychological, social and nutritional follow-up.
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Affiliation(s)
- L Tholin
- Service d'ORL et chirurgie cervico-faciale, CHRU de Nancy, université de Lorraine, hôpitaux de Brabois, Nancy, France.
| | - C Rumeau
- Service d'ORL et chirurgie cervico-faciale, CHRU de Nancy, université de Lorraine, hôpitaux de Brabois, Nancy, France
| | - R Jankowski
- Service d'ORL et chirurgie cervico-faciale, CHRU de Nancy, université de Lorraine, hôpitaux de Brabois, Nancy, France
| | - P Gallet
- Service d'ORL et chirurgie cervico-faciale, CHRU de Nancy, université de Lorraine, hôpitaux de Brabois, Nancy, France
| | - J Wen Hsieh
- Unité de rhinologie-olfactologie, service d'oto-rhino-laryngologie et chirurgie cervico-faciale, département des neurosciences cliniques, HUG, Geneva, Switzerland
| | - D T Nguyen
- Service d'ORL et chirurgie cervico-faciale, CHRU de Nancy, université de Lorraine, hôpitaux de Brabois, Nancy, France
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Kim KS, Kwak IY, Min HJ. Factors associated with impaired psychophysical gustatory function. Clin Otolaryngol 2024; 49:306-313. [PMID: 38199861 DOI: 10.1111/coa.14143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 12/10/2023] [Accepted: 12/30/2023] [Indexed: 01/12/2024]
Abstract
OBJECTIVE To investigate the clinical characteristics associated with measured gustatory dysfunction in patients with chemosensory (smell and taste) discomfort. STUDY DESIGN Retrospective study. DESIGN Hospital-based cohort. SETTING The clinical characteristics associated with the measured diagnosis of gustatory dysfunction were statistically analysed. PARTICIPANTS Patients who underwent all the psychophysical olfactory and chemical gustatory function tests (YSK olfactory function test and chemical gustometry exam) and the subjective questionnaires between October 2021 and February 2023. MAIN OUTCOME MEASURES YSK olfactory function test and chemical gustometry results, subjective questionnaire score about chemosensory (smell and taste) functions. The Medical records of patients who visited the smell and taste centre in a tertiary. RESULTS A total of 219 patients were enrolled; 180 were diagnosed as having normal gustatory function, and 39 were diagnosed as having gustatory dysfunction. Subjective recognition of gustatory function was not associated with the measured gustatory function. Age, sex, measured olfactory function and the threshold and discrimination scores for the olfactory function test were significant factors in the multivariate analysis. When the patients were further divided according to age, the threshold test scores rather than other subsets in the olfactory function test were significantly associated with measured gustatory dysfunction in patients 60 and older. CONCLUSION In older adult male patients with olfactory dysfunction, gustatory function should be considered regardless of subjective gustatory dysfunction.
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Affiliation(s)
- Kyung Soo Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Chung-Ang University College of Medicine, Seoul, South Korea
| | - Il-Youp Kwak
- Department of Applied Statistics, Chung-Ang University, Seoul, South Korea
| | - Hyun Jin Min
- Department of Otorhinolaryngology-Head and Neck Surgery, Chung-Ang University College of Medicine, Seoul, South Korea
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Gupta P, Chan A, Tai-Anh V, Man REK, Fenwick EK, Aravindhan A, Junxing C, Wood JM, Black AA, Ng JH, Cheng CY, Sabanayagam C, Lamoureux EL. Prevalence, associated risk factors; and patient and economic impact of multiple sensory impairment in a multi-ethnic elderly population in Singapore: the PIONEER study. BMC Public Health 2024; 24:1102. [PMID: 38649854 PMCID: PMC11034097 DOI: 10.1186/s12889-024-18635-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Accepted: 04/17/2024] [Indexed: 04/25/2024] Open
Abstract
BACKGROUND To determine the prevalence, risk factors; and impact on patient health and economic outcomes across the laterality spectrum of multiple sensory impairment (MSI) in a multi-ethnic older Asian population. METHODS In this population-based study of Singaporeans aged ≥ 60 years, MSI was defined as concomitant vision (visual acuity > 0.3 logMAR), hearing (pure-tone air conduction average > 25 dB), and olfactory (score < 12 on the Sniffin' Sticks test) impairments across the spectrum of laterality (any, unilateral, combination [of unilateral and bilateral], and bilateral). RESULTS Among 2,057 participants (mean ± SD 72.2 ± 0.2 years; 53.1% female), the national census-adjusted prevalence rates of any, unilateral, combination, and bilateral MSI were 20.6%, 1.2%, 12.2%, and 7.2%, respectively. Older age, male gender, low socioeconomic status (SES), and smoking (all p < 0.05) were independently associated with higher likelihood of any MSI. Compared to those with no sensory loss, those with MSI had significantly decreased mobility (range 5.4%-9.2%), had poor functioning (OR range 3.25-3.45) and increased healthcare costs (range 4-6 folds) across the laterality spectrum. Additionally, bilateral MSI had a significant decrease in HRQoL (5.5%, p = 0.012). CONCLUSIONS MSI is a highly prevalent medical condition, with 1 in 5; and almost 1 in 10 community-dwelling older Asians having any and bilateral MSI, respectively, with a higher likelihood in men, smokers, and those with low SES. Critically, MSI has a substantial negative impact on patient health and economic outcomes across the laterality spectrum. Sensory testing is critical to detect and refer individuals with MSI for management to improve their functional independence and QoL.
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Affiliation(s)
- Preeti Gupta
- Singapore Eye Research Institute (SERI), The Academia, 20 College Road, Level 6, Singapore, 169856, Singapore
- Duke-NUS Medical School, Singapore, Singapore
| | - Aurora Chan
- Singapore Eye Research Institute (SERI), The Academia, 20 College Road, Level 6, Singapore, 169856, Singapore
| | - Vu Tai-Anh
- Duke-NUS Medical School, Singapore, Singapore
| | - Ryan E K Man
- Singapore Eye Research Institute (SERI), The Academia, 20 College Road, Level 6, Singapore, 169856, Singapore
- Duke-NUS Medical School, Singapore, Singapore
| | - Eva K Fenwick
- Singapore Eye Research Institute (SERI), The Academia, 20 College Road, Level 6, Singapore, 169856, Singapore
- Duke-NUS Medical School, Singapore, Singapore
| | - Amudha Aravindhan
- Singapore Eye Research Institute (SERI), The Academia, 20 College Road, Level 6, Singapore, 169856, Singapore
- Duke-NUS Medical School, Singapore, Singapore
| | | | - Joanne M Wood
- Centre for Vision and Eye Research, Queensland University of Technology, Brisbane, Australia
| | - Alex A Black
- Centre for Vision and Eye Research, Queensland University of Technology, Brisbane, Australia
| | - Jia Hui Ng
- Singapore General Hospital (SGH), Singapore, Singapore
| | - Ching-Yu Cheng
- Singapore Eye Research Institute (SERI), The Academia, 20 College Road, Level 6, Singapore, 169856, Singapore
- Duke-NUS Medical School, Singapore, Singapore
| | - Charumathi Sabanayagam
- Singapore Eye Research Institute (SERI), The Academia, 20 College Road, Level 6, Singapore, 169856, Singapore
- Duke-NUS Medical School, Singapore, Singapore
| | - Ecosse L Lamoureux
- Singapore Eye Research Institute (SERI), The Academia, 20 College Road, Level 6, Singapore, 169856, Singapore.
- Duke-NUS Medical School, Singapore, Singapore.
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Deller M, Schriever VA, Hummel T. A Study on the Impact of the COVID-19 Pandemic on the Aetiology of Paediatric Olfactory Dysfunction. ORL J Otorhinolaryngol Relat Spec 2024; 86:65-72. [PMID: 38621374 DOI: 10.1159/000537835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Accepted: 02/13/2024] [Indexed: 04/17/2024]
Abstract
INTRODUCTION Although previous studies have examined olfactory dysfunction in children, the novel coronavirus SARS-CoV-2 has certainly had an unprecedented effect on their olfaction, which could not be taken into consideration. The aim of this report was to present data on the epidemiology of olfactory dysfunction during the pandemic and compare this dataset with a pre-pandemic set. We hypothesized an increase in URTI-related olfactory dysfunction. METHODS Data of paediatric patients consulting a smell and taste clinic between March 2020 and June 2022 were retrospectively analysed. The frequency of major causes of olfactory dysfunction was examined and compared with three subsets of an older dataset. RESULTS A total of 52 patients were included in the analysis. Most children presented with olfactory dysfunction due to upper respiratory tract infection (URTI) (52%). Congenital olfactory dysfunction was present in 34% of cases. Sinonasal disorders and idiopathic cases accounted for 6 and 4%, respectively, whereas head trauma was the least common cause (2%). This was in contrast with the results of the older set. The frequency of URTI-related olfactory dysfunction increased significantly. The frequency of head-trauma-related or congenital olfactory dysfunction showed marked reductions. There were no significant differences regarding the other aetiologies between our patient cohort and the three subsets. CONCLUSION The COVID-19 pandemic has resulted in differences regarding the prevalence of aetiologies between our dataset and the subsets of pre-pandemic times. The surge of the frequency of URTI-related olfactory dysfunction may be ascribed to a novel pathomechanism involving sustentacular cells in the olfactory epithelium.
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Affiliation(s)
- Matthias Deller
- Department of Paediatric Neurology, Charité - Universitätsmedizin Berlin, Berlin, Germany,
| | - Valentin A Schriever
- Department of Paediatric Neurology, Charité - Universitätsmedizin Berlin, Berlin, Germany
- Center for Chronically Sick Children (Sozialpädiatrisches Zentrum, SPZ), Charité - Universitätsmedizin Berlin, Berlin, Germany
- Abteilung Neuropädiatrie Medizinische Fakultät Carl Gustav Carus, Technische Universität, Dresden, Germany
| | - Thomas Hummel
- Smell and Taste Clinic, Department of Otorhinolaryngology, Medizinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
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Liu X, Su L, Li Y, Yuan H, Zhao A, Yang C, Chen C, Li C. Significant improvements in the olfactory sensitivity of bipolar I disorder patients during euthymia versus manic episodes: a longitudinal study. Front Psychiatry 2024; 15:1348895. [PMID: 38651009 PMCID: PMC11033851 DOI: 10.3389/fpsyt.2024.1348895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Accepted: 03/25/2024] [Indexed: 04/25/2024] Open
Abstract
Introduction Research has indicated that individuals diagnosed with bipolar disorder (BD) might experience alterations in their olfaction or levels of serum tumor necrosis factor-α (TNF-α), but no studies have investigated olfactory function and serum TNF-α in BD patients simultaneously. Moreover, there is a lack of existing research that compares the longitudinal olfactory function between individuals with manic and euthymic BD I. Methods Patients with manic BD I (BDM, n=44) and healthy controls (HCs, n=32) were evaluated symptoms (measured via the Young Manic Rating Scale, YRMS), social function (measured via the Global Assessment Function, GAF), serum TNF-α, and olfactory function (via the Sniffin' Sticks test) including olfactory sensitivity (OS) and olfactory identification (OI). The BDM patients were followed up to the remission period and re-evaluated again. We compared OS, OI and serum TNF-α in manic and euthymic patients with BD I and HCs. We examined the correlation between olfactory function and symptoms, social function, and serum TNF-α in patients with BD I. Results The BDM patients exhibited significantly lower OS and OI compared to the HCs (Z = -2.235, P = 0.025; t = -6.005, P < 0.001), while a positive correlation was observed between OS and GAF score (r = 0.313, P = 0.039). The OS in the BD I remission group (n=25) exhibited significantly superior performance compared to the BDM group (t = -4.056, P < 0.001), and the same as that in the HCs (P = 0.503). The change in OS showed a positive correlation with the decrease in YMRS score (r = 0.445, P = 0.026), and a negative correlation with the course of disease (r = -0.594, P = 0.002). The TNF-α in BD I patients was significantly lower compared to HCs (P < 0.001), and not significantly correlated with olfactory function (all P > 0.05). Conclusion The findings suggest that OS and OI are impaired in BDM patients, and the impaired OS in those patients can be recovered in the remission stage. OI may serve as a potential characteristic marker of BD. OS might be useful as an index for BDM treatment efficacy and prognosis.
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Affiliation(s)
| | | | | | | | | | | | | | - Chunyang Li
- Department of Psychiatry, Shunde WuZhongpei Memorial Hospital, Foshan, Guangdong, China
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