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Köteles F, Nordin S. Do somatic symptom distress and attribution predict symptoms associated with environmental factors? J Psychosom Res 2024; 179:111637. [PMID: 38442536 DOI: 10.1016/j.jpsychores.2024.111637] [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: 11/03/2023] [Revised: 02/28/2024] [Accepted: 02/28/2024] [Indexed: 03/07/2024]
Abstract
OBJECTIVE Not much is known on the development of symptoms associated with environmental factors (SAEF), also known as (idiopathic) environmental intolerances. Findings from qualitative studies suggest that appearance of symptoms might be the first step, followed by the acquisition of a specific attribution. The current study investigated cross-sectional and longitudinal (three years) associations between attribution and symptoms with respect to symptoms associated with chemical substances, certain indoor environments (buildings), sounds, and electromagnetic fields (EMFs). METHODS We used data from the first two waves of the population-based Västerbotten Environmental Health Study (n = 2336). Participants completed the Patient Health Questionnaire Somatic Symptom Scale (PHQ-15), the Environmental Symptom-Attribution Scale, and answered single questions on the four aforementioned SAEFs. RESULTS Using binary logistic regression analyses, all four SAEFs showed significant cross-sectional associations with somatic symptom distress and the respective attribution. In the longitudinal analysis, development of SAEF-Sound and SAEF-Chemicals were predicted by both somatic symptom distress and attribution. SAEF-EMFs was predicted only by attribution, whereas neither somatic symptom distress nor attribution forecasted SAEF-Buildings. CONCLUSION Overall, these findings suggest that attribution (i.e., a specific expectation) plays a substantial role in the development and maintenance of many SAEFs.
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Affiliation(s)
- Ferenc Köteles
- Institute of Psychology, Károli Gáspár University of the Reformed Church in Hungary, Budapest, Hungary.
| | - Steven Nordin
- Department of Psychology, Umeå University, Umeå, Sweden.
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Kleinbeck S, Wolkoff P. Exposure limits for indoor volatile substances concerning the general population: The role of population-based differences in sensory irritation of the eyes and airways for assessment factors. Arch Toxicol 2024; 98:617-662. [PMID: 38243103 PMCID: PMC10861400 DOI: 10.1007/s00204-023-03642-w] [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: 09/22/2023] [Accepted: 11/16/2023] [Indexed: 01/21/2024]
Abstract
Assessment factors (AFs) are essential in the derivation of occupational exposure limits (OELs) and indoor air quality guidelines. The factors shall accommodate differences in sensitivity between subgroups, i.e., workers, healthy and sick people, and occupational exposure versus life-long exposure for the general population. Derivation of AFs itself is based on empirical knowledge from human and animal exposure studies with immanent uncertainty in the empirical evidence due to knowledge gaps and experimental reliability. Sensory irritation in the eyes and airways constitute about 30-40% of OELs and is an abundant symptom in non-industrial buildings characterizing the indoor air quality and general health. Intraspecies differences between subgroups of the general population should be quantified for the proposal of more 'empirical' based AFs. In this review, we focus on sensitivity differences in sensory irritation about gender, age, health status, and vulnerability in people, based solely on human exposure studies. Females are more sensitive to sensory irritation than males for few volatile substances. Older people appear less sensitive than younger ones. However, impaired defense mechanisms may increase vulnerability in the long term. Empirical evidence of sensory irritation in children is rare and limited to children down to the age of six years. Studies of the nervous system in children compared to adults suggest a higher sensitivity in children; however, some defense mechanisms are more efficient in children than in adults. Usually, exposure studies are performed with healthy subjects. Exposure studies with sick people are not representative due to the deselection of subjects with moderate or severe eye or airway diseases, which likely underestimates the sensitivity of the group of people with diseases. Psychological characterization like personality factors shows that concentrations of volatile substances far below their sensory irritation thresholds may influence the sensitivity, in part biased by odor perception. Thus, the protection of people with extreme personality traits is not feasible by an AF and other mitigation strategies are required. The available empirical evidence comprising age, lifestyle, and health supports an AF of not greater than up to 2 for sensory irritation. Further, general AFs are discouraged for derivation, rather substance-specific derivation of AFs is recommended based on the risk assessment of empirical data, deposition in the airways depending on the substance's water solubility and compensating for knowledge and experimental gaps. Modeling of sensory irritation would be a better 'empirical' starting point for derivation of AFs for children, older, and sick people, as human exposure studies are not possible (due to ethical reasons) or not generalizable (due to self-selection). Dedicated AFs may be derived for environments where dry air, high room temperature, and visually demanding tasks aggravate the eyes or airways than for places in which the workload is balanced, while indoor playgrounds might need other AFs due to physical workload and affected groups of the general population.
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Affiliation(s)
- Stefan Kleinbeck
- Leibniz Research Centre for Working Environment and Human Factors, Dortmund, Germany.
| | - Peder Wolkoff
- National Research Centre for the Working Environment, Copenhagen, Denmark
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3
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Köteles F. Vague sensations. About the background and consequences of discordance between actual and perceived physiological changes. Clin Psychol Rev 2024; 108:102382. [PMID: 38218123 DOI: 10.1016/j.cpr.2024.102382] [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: 05/06/2023] [Revised: 10/28/2023] [Accepted: 01/05/2024] [Indexed: 01/15/2024]
Abstract
Empirical evidence consistently shows that discordance, also called dissociation or discrepancy, between actual physiological (mainly visceral) events and their perceived counterparts is substantial. On the one hand, we typically do not perceive actual visceral events occurring in our bodies; on the other hand, sometimes we do perceive bodily changes that do not really take place. This narrative review presents the available empirical findings on the discordance, and summarizes possible explanations that approach the phenomenon from the viewpoint of evolution, cognitive development, and predictive processing. Also, the role of top-down factors, such as expectations and experiences is discussed. Finally, practically relevant consequences of the discordance are presented using the examples of mind-body practices, the placebo and nocebo phenomenon, and medically unexplained symptoms. It is concluded that the discordance between actual and perceived body changes can have a negative impact on health, mainly through issues with adherence and other behavioral factors. The existence of actual-perceived discordance should be taught and demonstrated in the elementary and high school, as well as in many areas of higher education.
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Affiliation(s)
- Ferenc Köteles
- Institute of Psychology, Károli Gáspár University of the Reformed Church in Hungary, Budapest, Hungary; Ádám György Psychophysiology Research Group, Budapest, Hungary.
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Pitron V, Köteles FG, Nordin S, Haanes JV, Hillert L, Léger D, Lemogne C, Szemerszky R, van Kamp I, van Thriel C, Witthöft M, Van den Bergh O. Multiple Chemical Sensitivity: Catching up to what kind of science? Neurosci Biobehav Rev 2024; 157:105524. [PMID: 38154656 DOI: 10.1016/j.neubiorev.2023.105524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 11/28/2023] [Accepted: 12/21/2023] [Indexed: 12/30/2023]
Affiliation(s)
- Victor Pitron
- Université Paris Cité, VIFASOM (Vigilance Fatigue Sommeil et Santé Publique), Paris, France; Centre du Sommeil et de la Vigilance-Pathologie professionnelle, APHP, Hôtel-Dieu, F-75004 Paris, France.
| | | | - Steven Nordin
- Department of Psychology, Umeå University, SE-901 87 Umeå, Sweden
| | - Jan Vilis Haanes
- Department of Occupational and Environmental Medicine, University Hospital of North Norway, NO-9038 Tromsø, Norway; Department of Community Medicine, University of Tromsø, NO-9037 Tromsø, Norway
| | - Lena Hillert
- Institute of Environmental Medicine, Karolinska Institutet, SE-171 77 Stockholm, Sweden; Centre for Occupational and Environmental Medicine, Stockholm County Council, SE-113 65 Stockholm, Sweden
| | - Damien Léger
- Université Paris Cité, VIFASOM (Vigilance Fatigue Sommeil et Santé Publique), Paris, France; Centre du Sommeil et de la Vigilance-Pathologie professionnelle, APHP, Hôtel-Dieu, F-75004 Paris, France
| | - Cédric Lemogne
- Université Paris Cité and Université Sorbonne Paris Nord, Inserm, INRAE, Center for Research in Epidemiology and StatisticS (CRESS), F-75004 Paris, France; Service de Psychiatrie de l'adulte, AP-HP, Hôpital Hôtel-Dieu, F-75004 Paris, France
| | - Renáta Szemerszky
- Károli Gáspár University of the Reformed Church in Hungary, Budapest, Hungary
| | - Irene van Kamp
- Centre for Sustainability, Environment and Health, National Institute for Public Health and the Environment, 3720 BA Bilthoven, the Netherlands
| | - Christoph van Thriel
- Leibniz Research Centre for Working Environment and Human Factors, TU Dortmund University, DE-44139 Dortmund, Germany
| | - Michael Witthöft
- Department of Clinical Psychology, Psychotherapy, and Experimental Psychopathology, Johannes Gutenberg University, DE-55122 Mainz, Germany
| | - Omer Van den Bergh
- Health Psychology, Faculty of Psychology and Educational Sciences, University of Leuven, BE-3000, Belgium
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Köteles F, Nordin S, Claeson AS. Associations between symptoms, modern health worries, and somatosensory amplification in patients with building-related symptoms. J Psychosom Res 2023; 173:111476. [PMID: 37643562 DOI: 10.1016/j.jpsychores.2023.111476] [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: 09/22/2022] [Revised: 08/21/2023] [Accepted: 08/22/2023] [Indexed: 08/31/2023]
Abstract
OBJECTIVE The objective of the present study was to investigate the associations between somatosensory amplification, modern health worries (MHWs), and symptoms among patients with building-related symptoms (BRS). METHODS Patients with self-reported and medically confirmed BRS (n = 83) were included in this cross-sectional study. The Somatosensory Amplification Scale (SSAS) was used to quantify the tendency to amplify somatic sensations and perceive them as unpleasant and dangerous. Concerns about harmful effects of modern technologies were assessed with the Modern Health Worries Scale (MHWS). Symptoms commonly found in different forms of environmental intolerance were assessed with the Environmental Hypersensitivity Symptom Inventory (EHSI). RESULTS Patients with BRS were characterized by more frequent and more severe environmental hypersensitivity symptoms compared to a reference population. Females and those with co-morbid self-reported chemical intolerance reported even more symptoms. MHWS and SSAS scores showed weak to moderate associations with symptoms, even after adjusting for socio-economic variables. However, neither the mean MHWS score or the SSAS score of our sample differed from normative scores. CONCLUSION Patients with BRS are not characterized by elevated levels of MHWs and somatosensory amplification, thus other, psychosocial and/or environmental, factors may have contributed to the development of the condition. However, the associations between severity of symptoms and MHWs and somatosensory amplification suggest that psychosocial characteristics may substantially influence symptom experience in this group.
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Affiliation(s)
- Ferenc Köteles
- Institute of Health Promotion and Sport Sciences, ELTE Eötvös Loránd University, Budapest, Hungary; Institute of Psychology, Károli Gáspár University of the Reformed Church in Hungary, Budapest, Hungary.
| | - Steven Nordin
- Department of Psychology, Umeå University, Umeå, Sweden.
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Hempel S, Danz M, Robinson KA, Bolshakova M, Rodriguez J, Mears A, Pham C, Yagyu S, Motala A, Tolentino D, Akbari O, Johnston J. Multiple chemical sensitivity scoping review protocol: overview of research and MCS construct. BMJ Open 2023; 13:e072098. [PMID: 37739463 PMCID: PMC10533706 DOI: 10.1136/bmjopen-2023-072098] [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: 01/27/2023] [Accepted: 08/16/2023] [Indexed: 09/24/2023] Open
Abstract
INTRODUCTION Multiple chemical sensitivity (MCS) has been characterised by reported adverse responses to environmental exposures of common chemical agents (eg, perfumes, paint, cleaning products and other inhaled or ingested agents) in low doses considered non-toxic for the general population. There is currently no consensus on whether MCS can be established as a distinct disorder. METHODS AND ANALYSIS The scoping review of the literature will be guided by five questions: How is MCS defined and which diagnostic criteria have been proposed? What methods are used to report prevalence and incidence estimates of MCS? What are the characteristics of the body of scientific evidence that addresses whether MCS is a distinct disorder or syndrome? What underlying mechanisms for MCS have been proposed in the scientific literature? Which treatment and management approaches for MCS have been evaluated in empirical research studies? We will conduct a comprehensive search in 14 research databases. Citation screening will be supported by machine learning algorithms. Two independent reviewers will assess eligibility of full-text publications against prespecified criteria. Data abstraction will support concise evidence tables. A formal consultation exercise will elicit input regarding the review results and presentation. The existing research evidence will be documented in a user-friendly visualisation in the format of an evidence map. ETHICS AND DISSEMINATION Determined to be exempt from review (UP-22-00516). Results will be disseminated through a journal manuscript and data will be publicly accessible through an online data repository. REGISTRATION DETAILS The protocol is registered in Open Science Framework (osf.io/4a3wu).
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Affiliation(s)
- Susanne Hempel
- Southern California Evidence Review Center, University of Southern California, Los Angeles, California, USA
| | - Margie Danz
- Southern California Evidence Review Center, University of Southern California, Los Angeles, California, USA
| | - Karen A Robinson
- Division of Health Science Informatics, John Hopkins Medicine, Baltimore, Maryland, USA
| | - Maria Bolshakova
- Southern California Evidence Review Center, University of Southern California, Los Angeles, California, USA
| | - Jesus Rodriguez
- Southern California Evidence Review Center, University of Southern California, Los Angeles, California, USA
| | - Alanna Mears
- Southern California Evidence Review Center, University of Southern California, Los Angeles, California, USA
| | - Cindy Pham
- Southern California Evidence Review Center, University of Southern California, Los Angeles, California, USA
| | - Sachi Yagyu
- Southern California Evidence Review Center, University of Southern California, Los Angeles, California, USA
| | - Aneesa Motala
- Southern California Evidence Review Center, University of Southern California, Los Angeles, California, USA
| | - Danica Tolentino
- Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - Omid Akbari
- Molecular Microbiology and Immunology, University of Southern California, Los Angeles, California, USA
| | - Jill Johnston
- Keck School of Medicine, University of Southern California, Los Angeles, California, USA
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Köteles F, Szemerszky R, Petrie K, Nordin S. Modern health worries and annoyance from environmental factors are largely unrelated to smoking, alcohol consumption, and physical activity. J Psychosom Res 2023; 172:111417. [PMID: 37331267 DOI: 10.1016/j.jpsychores.2023.111417] [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: 03/09/2023] [Revised: 05/30/2023] [Accepted: 06/13/2023] [Indexed: 06/20/2023]
Abstract
OBJECTIVE Modern health worries, as well as environmental annoyance from chemical agents, noise, and electromagnetic exposure are associated with symptom reporting and marked affective-behavioural changes. As promotion and protection of health is a primary characteristic of these conditions, it can be expected that they will be related to less risk behaviour (smoking and alcohol consumption) and more health behaviour (physical activity), both cross-sectionally and longitudinally. METHODS Hypotheses were tested in a sample of 2336 individuals participating in T1 and T2 data collection (3 years apart) of the Västerbotten Environmental Health Study, Sweden. Health-related behaviours were assessed using single self-report questions. Smoking was measured on a binary (yes-or-no) scale; frequency of alcohol consumption and physical activity was measured on a 5-point and a 4-point scale, respectively. RESULTS Modern health worries showed no cross-sectional association with the three behaviours, whereas annoyance was typically inversely, very weakly, related to smoking and alcohol consumption. Physical activity was significantly positively associated only with chemical annoyance. None of the variables significantly predicted change of behaviours at T2 after controlling for the respective T1 value and demographic variables. CONCLUSIONS Individuals with high levels of modern health worries and annoyance from various environmental agents are not clearly characterized by a healthier lifestyle. Perhaps they focus on the alleviation of their existing symptoms; alternatively, somatic symptom distress decreases their cognitive-affective resources necessary for a long-term life style change.
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Affiliation(s)
- Ferenc Köteles
- Institute of Psychology, Károli Gáspár University of the Reformed Church in Hungary, Hungary.
| | - Renáta Szemerszky
- Institute of Psychology, Károli Gáspár University of the Reformed Church in Hungary, Hungary.
| | - Keith Petrie
- Department of Psychological Medicine, University of Auckland, New Zealand.
| | - Steven Nordin
- Department of Psychology, Umeå University, Umeå, Sweden.
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Nordin S, Köteles F, Witthöft M, Van den Bergh O, Nyback MH, Sainio M. Impact of comorbidity on symptomatology in various types of environmental intolerance in a general Swedish and Finnish adult population. ENVIRONMENTAL RESEARCH 2023; 229:115945. [PMID: 37080270 DOI: 10.1016/j.envres.2023.115945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 03/23/2023] [Accepted: 04/17/2023] [Indexed: 05/03/2023]
Abstract
Comorbidity with various health conditions is common in environmental intolerances (EIs), which restricts understanding for what symptoms that are associated with the intolerance per se. The present objectives were to study (i) prevalence of a broad range of specific symptoms in chemical, building-related, electromagnetic field- (EMF) related, and sound EI, irrespective of comorbidity, (ii) prevalence of symptoms in body systems in exclusive EIs, and (iii) increased risk of symptoms in body systems in exclusive EIs that cannot be referred to functional somatic syndromes, inflammatory diseases or mental disorders. Cross-sectional data (n = 4941) were used from two combined population-based surveys, the Västerbotten (Sweden) and Österbotten (Finland) Environmental Health Studies. Categorization of EI cases and controls were based on self-reports. Symptoms were assessed with the Environmental Hypersensitivity Symptom Inventory, and these were converted to 27 symptoms of the International Classification of Primary Care, 2nd edition, in eight chapters of body systems. The results showed, with few exceptions, that all assessed specific symptoms were significantly more prevalent in all four EIs than in referents. Although a large overlap between EIs, characteristic body system symptoms were eye and respiratory symptoms in chemical and building-related intolerance, skin symptoms in EMF-related intolerance, and general and unspecified, digestive, eye, cardiovascular, neurological, and psychological symptoms in sound intolerance. After controlling for various comorbidities, all studied body system symptoms were positively associated with chemical intolerance, fewer with sound intolerance, only one with building-related intolerance, and none with EMF-related EI. In conclusion, a broad range of symptoms are reported in all four EIs implying common mechanisms, but symptoms of certain body systems are more likely to be reported in a certain EI that cannot be explained by comorbidity.
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Affiliation(s)
- Steven Nordin
- Department of Psychology, Umeå University, Umeå, Sweden.
| | - Ferenc Köteles
- Károli Gáspár University of the Reformed Church in Hungary, Budapest, Hungary.
| | - Michael Witthöft
- Department of Clinical Psychology, Psychotherapy, And Experimental Psychopathology, Johannes Gutenberg-University Mainz, Mainz, Germany.
| | | | | | - Markku Sainio
- Outpatient Clinic for Functional Disorders, Helsinki University Hospital, Helsinki, Finland.
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Nynäs P, Vilpas S, Kankare E, Karjalainen J, Lehtimäki L, Numminen J, Tikkakoski A, Kleemola L, Uitti J. Laboratory Test Results in Patients with Workplace Moisture Damage Associated Symptoms—The SAMDAW Study. Healthcare (Basel) 2023; 11:healthcare11070971. [PMID: 37046898 PMCID: PMC10093791 DOI: 10.3390/healthcare11070971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Revised: 03/25/2023] [Accepted: 03/28/2023] [Indexed: 03/31/2023] Open
Abstract
The mechanisms of health effects of moisture damage (MD) are unclear, but inflammatory responses have been suspected. The usefulness of laboratory and allergy tests among patients in secondary healthcare with symptoms associated with workplace MD were examined. Full blood count, erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), total serum immunoglobulin E (IgE), fractional exhaled nitric oxide (FeNO), and skin prick testing were assessed and analyzed in relation to multiple chemical sensitivity (MCS) and perceived stress in 99 patients and 48 controls. In analysis, t-tests, Mann-Whitney tests, and chi-squared tests were used. Minor clinically insignificant differences in blood counts were seen in patients and controls, but among patients with asthma an elevated neutrophil count was found in 19% with and only in 2% of patients without asthma (p = 0.003). CRP levels and ESR were low, and the study patients’ FeNO, total IgE, or allergic sensitization were not increased compared to controls. The level of stress was high among 26% of patients and 6% of controls (p = 0.005), and MCS was more common among patients (39% vs. 10%, p < 0.001). Stress or MCS were not significantly associated with laboratory test results. In conclusion, no basic laboratory or allergy test results were characteristic of this patient group, and neither inflammatory processes nor allergic sensitization were found to explain the symptoms among these patients. While the value of basic laboratory tests should not be ignored, the use of allergy tests does not seem necessary when symptoms are indicated to be workplace-related.
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Affiliation(s)
- Pia Nynäs
- Faculty of Medicine and Health Technology, Tampere University, 33520 Tampere, Finland
- Correspondence:
| | - Sarkku Vilpas
- Department of Phoniatrics, Tampere University Hospital, 33520 Tampere, Finland
| | - Elina Kankare
- Department of Phoniatrics, Tampere University Hospital, 33520 Tampere, Finland
| | - Jussi Karjalainen
- Faculty of Medicine and Health Technology, Tampere University, 33520 Tampere, Finland
- Allergy Centre, Tampere University Hospital, 33520 Tampere, Finland
| | - Lauri Lehtimäki
- Faculty of Medicine and Health Technology, Tampere University, 33520 Tampere, Finland
- Allergy Centre, Tampere University Hospital, 33520 Tampere, Finland
| | - Jura Numminen
- Allergy Centre, Tampere University Hospital, 33520 Tampere, Finland
| | - Antti Tikkakoski
- Department of Clinical Physiology and Nuclear Medicine, Tampere University Hospital, 33520 Tampere, Finland
| | - Leenamaija Kleemola
- Faculty of Medicine and Health Technology, Tampere University, 33520 Tampere, Finland
| | - Jukka Uitti
- Faculty of Medicine and Health Technology, Tampere University, 33520 Tampere, Finland
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Pitron V, Haanes JV, Hillert L, Köteles FG, Léger D, Lemogne C, Nordin S, Szemerszky R, van Kamp I, van Thriel C, Witthöft M, Van den Bergh O. Electrohypersensitivity is always real. ENVIRONMENTAL RESEARCH 2023; 218:114840. [PMID: 36463993 DOI: 10.1016/j.envres.2022.114840] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 11/15/2022] [Indexed: 06/17/2023]
Affiliation(s)
- Victor Pitron
- Université Paris Cité, VIFASOM (Vigilance Fatigue Sommeil et Santé Publique), Paris, France; Centre du Sommeil et de la Vigilance-Pathologie professionnelle, APHP, Hôtel-Dieu, F-75004 Paris, France.
| | - Jan Vilis Haanes
- Department of Occupational and Environmental Medicine, University Hospital of North Norway, NO-9038 Tromsø, Norway; Department of Community Medicine, University of Tromsø, NO-9037 Tromsø, Norway
| | - Lena Hillert
- Institute of Environmental Medicine, Karolinska Institutet, SE-171 77 Stockholm, Sweden; Centre for Occupational and Environmental Medicine, Stockholm County Council, SE-113 65 Stockholm, Sweden
| | | | - Damien Léger
- Université Paris Cité, VIFASOM (Vigilance Fatigue Sommeil et Santé Publique), Paris, France; Centre du Sommeil et de la Vigilance-Pathologie professionnelle, APHP, Hôtel-Dieu, F-75004 Paris, France
| | - Cédric Lemogne
- Université Paris Cité, INSERM U1266, Institut de Psychiatrie et Neuroscience de Paris, F-75014 Paris, France; Service de Psychiatrie de l'adulte, AP-HP, Hôpital Hôtel-Dieu, F-75004 Paris, France
| | - Steven Nordin
- Department of Psychology, Umeå University, SE-901 87 Umeå, Sweden
| | - Renáta Szemerszky
- Károli Gáspár University of the Reformed Church in Hungary, Budapest, Hungary
| | - Irene van Kamp
- Centre for Sustainability, Environment and Health, National Institute for Public Health and the Environment, 3720 BA Bilthoven, the Netherlands
| | - Christoph van Thriel
- Leibniz Research Centre for Working Environment and Human Factors, TU Dortmund University, DE-44139 Dortmund, Germany
| | - Michael Witthöft
- Department of Clinical Psychology, Psychotherapy, and Experimental Psychopathology, Johannes Gutenberg University, DE-55122 Mainz, Germany
| | - Omer Van den Bergh
- Health Psychology, Faculty of Psychology and Educational Sciences, University of Leuven, BE-3000, Belgium
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An idiographic approach to idiopathic environmental intolerance attributed to electromagnetic fields (IEI-EMF) part I. Environmental, psychosocial and clinical assessment of three individuals with severe IEI-EMF. Heliyon 2022; 8:e09987. [PMID: 35874058 PMCID: PMC9305360 DOI: 10.1016/j.heliyon.2022.e09987] [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: 10/22/2021] [Revised: 03/19/2022] [Accepted: 07/13/2022] [Indexed: 11/22/2022] Open
Abstract
IEI-EMF refers to an environmental illness whose primary feature is the occurrence of symptoms that are attributed to exposure to weak electromagnetic fields (EMFs). There is a growing evidence that this condition is characterized by marked individual differences thus a within-subject approach might add important information beyond the widely used nomothetic method. A mixed qualitative/quantitative idiographic protocol with a threefold diagnostic approach was tested with the participation of three individuals with severe IEI-EMF. In this qualitative paper, the environmental, psychosocial, and clinical aspects are presented and discussed (results of ecological momentary assessment are discussed in Part II of this study). For two participants, psychopathological factors appeared to be strongly related to the condition. Psychological assessment indicated a severe pre-psychotic state with paranoid tendencies, supplemented with a strong attentional focus on bodily sensations and health status. The psychological profile of the third individual showed no obvious pathology. Overall, the findings suggest that the condition might have uniformly been triggered by serious psychosocial stress for all participants. Substantial aetiological differences among participants with severe IEI-EMF were revealed. The substantial heterogeneity in the psychological and psychopathological profiles associated with IEI-EMF warrants the use of idiographic multimodal assessments in order to better understand the different ways of aetiology and to facilitate person-taylored treatments.
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Speck MJ, Witthöft M. Symptoms of Idiopathic Environmental Intolerance associated with chemicals (IEI-C) are positively associated with perceptual anomalies. J Psychosom Res 2022; 157:110808. [PMID: 35421699 DOI: 10.1016/j.jpsychores.2022.110808] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 03/29/2022] [Accepted: 03/30/2022] [Indexed: 11/20/2022]
Abstract
OBJECTIVE Idiopathic Environmental Intolerance (IEI; i.e. the experience of somatic symptoms attributed to environmental agents) represents a functional somatic syndrome of unclear aetiology. Based on previous findings that suggest an association between IEI and perceptual anomalies, this study aimed to investigate the relationship between symptoms of IEI associated with chemicals (IEI-C) and facets of the schizotypy spectrum. METHODS A cross-sectional study design was used with N = 410 (78.3% female) persons responding to an online survey in which chemical odor sensitivity (COS) and modern health worries (MHW) that are associated with IEI-C, as well as schizotypal personality traits (SPQ), hallucination proneness (LSHS) and delusional ideation (PDI) as core components of the schizotypy spectrum were assessed. RESULTS Schizotypal traits were found to be significantly positively associated with MHWs (r = 0.20, p = .01), COS (r = 0.23, p = .01), and showed significant positive associations with hallucination proneness. Magical thinking was found to exhibit a significant positive relationship with both MHW (r = 0.17, p = .01) and COS (r = 0.21, p = .01). These small associations between IEI-C and facets of the psychosis spectrum remained significant even after statistically controlling for individual levels of trait anxiety and depression. CONCLUSION Schizotypal personality traits, particularly magical thinking, and hallucination proneness, appear positively related to facets of IEI-C. The findings are of relevance for the advancement of theoretical models of IEI.
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Affiliation(s)
- M J Speck
- Department of Clinical Psychology, Psychotherapy and Experimental Psychopathology, University of Mainz, Germany.
| | - M Witthöft
- Department of Clinical Psychology, Psychotherapy and Experimental Psychopathology, University of Mainz, Germany
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Watrin L, Nordin S, Szemerszky R, Wilhelm O, Witthöft M, Köteles F. Psychological models of development of idiopathic environmental intolerances: Evidence from longitudinal population-based data. ENVIRONMENTAL RESEARCH 2022; 204:111774. [PMID: 34506786 DOI: 10.1016/j.envres.2021.111774] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 07/20/2021] [Accepted: 07/24/2021] [Indexed: 06/13/2023]
Abstract
The origin of idiopathic environmental intolerances (IEIs) is an open question. According to the psychological approaches, various top-down factors play a dominant role in the development of IEIs. The general psychopathology model assumes a propensity towards mental ill-health (negative affectivity) increases the probability of developing IEIs. The attribution model emphasizes the importance of mistaken attribution of experienced somatic symptoms; thus, more symptoms should lead to more IEIs. Finally, the nocebo model highlights the role of expectations in the development of IEIs. In this case, worries about the harmful effects of environmental factors are assumed to evoke IEIs. We estimated cross-lagged panel models with latent variables based on longitudinal data obtained at two time points (six years apart) from a large near-representative community sample to test the hypothesized associations. Indicators of chemical intolerance, electromagnetic hypersensitivity, and sound sensitivity fit well under a common latent factor of IEIs. This factor, in turn, showed considerable temporal stability. However, whereas a positive association was found between IEIs and increased somatic symptoms and modern health worries six years later, the changes therein could not be predicted as hypothesized by the three psychological models. We discuss the implications of these results, as well as methodological aspects in the measurement and prediction of change in IEIs.
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Affiliation(s)
- Luc Watrin
- Institute for Psychology and Education, Ulm University, Germany.
| | | | - Renáta Szemerszky
- Institute of Health Promotion and Sport Sciences, ELTE Eötvös Loránd University, Hungary
| | - Oliver Wilhelm
- Institute for Psychology and Education, Ulm University, Germany
| | - Michael Witthöft
- Department of Clinical Psychology, Psychotherapy and Experimental Psychopathology, Johannes Gutenberg-University of Mainz, Germany
| | - Ferenc Köteles
- Institute of Health Promotion and Sport Sciences, ELTE Eötvös Loránd University, Hungary
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Multiple Chemical Sensitivity in Patients Exposed to Moisture Damage at Work and in General Working-Age Population-The SAMDAW Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph182312296. [PMID: 34886041 PMCID: PMC8657242 DOI: 10.3390/ijerph182312296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 11/18/2021] [Accepted: 11/21/2021] [Indexed: 11/17/2022]
Abstract
A considerable proportion of patients having respiratory tract or voice symptoms associated with workplace moisture damage (MD) could have multiple chemical sensitivity (MCS). MCS is characterized by symptoms of different organ systems in association with low-level chemical exposure. The objective of this study was to assess the prevalence of MCS among patients referred to secondary health care because of respiratory or voice symptoms associated with workplace MD compared to the general working-age population. Using three subscales of the QEESI© questionnaire, we assessed MCS in the study patients and 1500 controls in the same district randomly selected from the Finnish Population Information System. Study patients had significantly more often high scores in chemical intolerance (39% vs. 23%, p = 0.001), symptom severity (60% vs. 27%, p < 0.001), and life impact subscales (53% vs. 20%, p < 0.001). Asthma, chronic rhinosinusitis, laryngeal problems, and atopy were not associated with the presence of MCS. MCS is common among patients referred to secondary health care with respiratory tract and/or voice symptoms associated with workplace MD, and it considerably affects their everyday life. MCS should be considered as a possible explanatory factor for MD-associated symptoms.
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Palmieri B, Corazzari V, Vadalaʹ M, Vallelunga A, Morales-Medina JC, Iannitti T. The role of sensory and olfactory pathways in multiple chemical sensitivity. REVIEWS ON ENVIRONMENTAL HEALTH 2021; 36:319-326. [PMID: 33070122 DOI: 10.1515/reveh-2020-0058] [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: 05/20/2020] [Accepted: 09/15/2020] [Indexed: 06/11/2023]
Abstract
Multiple chemical sensitivity (MCS) is characterised by non-specific and recurring symptoms affecting multiple organs and associated with exposure to chemicals, even at low concentrations, which are, under normal circumstances, harmless to the general population. Symptoms include general discomfort, cardiovascular instability, irritation of the sensory organs, breath disorders, hypersensitivity affecting the skin and epithelial lining of the gut, throat and lungs, anxiety, and learning and memory loss. Chemical intolerance is a key distinguishing feature of MCS, limiting considerably patients' lifestyle with serious social, occupational and economic implications. Since no specific diagnostic markers are currently available for chemical intolerance, the diagnosis relies on clinical symptoms. Despite the formulation of several hypotheses regarding the pathophysiology of MCS, its mechanisms remain undefined. A person-centred care approach, based on multidisciplinary and individualised medical plans, has shown promising results. However, more definite treatment strategies are required. We have reviewed the main experimental studies on MCS pathophysiology, focusing on the brain networks involved, the impact of environmental pollution on the olfactory system and the correlation with other pathologies such as neurodegenerative diseases. Finally, we discuss treatment strategies targeting the olfactory system.
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Affiliation(s)
- Beniamino Palmieri
- Surgical, Medical, Dental and Morphological Sciences Departments with interest in Transplants, Oncology and Regenerative Medicine, University of Modena and Reggio Emilia, Modena, Italy
- Network of Second Opinion, Modena, Italy
| | | | - Maria Vadalaʹ
- Surgical, Medical, Dental and Morphological Sciences Departments with interest in Transplants, Oncology and Regenerative Medicine, University of Modena and Reggio Emilia, Modena, Italy
- Network of Second Opinion, Modena, Italy
| | - Annamaria Vallelunga
- Department of Medicine and Surgery, Centre for Neurodegenerative Diseases (CEMAND), University of Salerno, Salerno, Italy
| | - Julio César Morales-Medina
- Centro de Investigación en Reproducción Animal, CINVESTAV- Universidad Autónoma de Tlaxcala, Tlaxcala, Mexico
| | - Tommaso Iannitti
- Charles River Discovery Research Services UK Limited, Portishead, UK
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Van den Bergh O, Bräscher AK, Witthöft M. Idiopathic Environmental Intolerance: A Treatment Model. COGNITIVE AND BEHAVIORAL PRACTICE 2021. [DOI: 10.1016/j.cbpra.2020.05.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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17
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Andersson L, Sandberg P, Åström E, Lillqvist M, Claeson AS. Chemical Intolerance Is Associated With Altered Response Bias, not Greater Sensory Sensitivity. Iperception 2020; 11:2041669520978424. [PMID: 33425314 PMCID: PMC7754803 DOI: 10.1177/2041669520978424] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 11/13/2020] [Indexed: 12/23/2022] Open
Abstract
Chemical intolerance is a surprisingly prevalent condition or affliction characterized by adverse reactions to low levels of chemical, often odorous stimulation. Sufferers often assume that their plight is due to an uncommon sensory acuteness, yet studies repeatedly fail to reveal altered detection thresholds. Here, we investigated whether self-reported chemical intolerance is associated with altered sensory sensitivity or response bias. The sensory acuity (sensitivity; A) and sensory decision rule (criterion; B) to n-butanol was assessed using the method of constant stimuli in 82 participants with different degrees of chemical intolerance (low to high). Higher self-reported chemical intolerance was associated with a lower criterion, but not with sensitivity.
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Affiliation(s)
| | - Petra Sandberg
- Department of Radiation Sciences, Umeå University, Umeå, Sweden
| | | | - Moa Lillqvist
- Department of Psychology, Umeå University, Umeå, Sweden
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