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Emilsson ÖI, Aspelund T, Janson C, Benediktsdottir B, Juliusson S, Maislin G, Pack AI, Keenan BT, Gislason T. Nocturnal gastro-oesophageal reflux and respiratory symptoms are increased in sleep apnoea: comparison with the general population. BMJ Open Respir Res 2024; 11:e002192. [PMID: 38531547 DOI: 10.1136/bmjresp-2023-002192] [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: 11/14/2023] [Accepted: 03/14/2024] [Indexed: 03/28/2024] Open
Abstract
AIM To assess respiratory symptoms and nocturnal gastro-oesophageal reflux (nGER) among untreated obstructive sleep apnoea (OSA) patients, compared with the general population. Also, if nGER associates differently with respiratory symptoms among OSA patients. METHODS 2 study cohorts were included: 822 newly diagnosed subjects with moderate-severe OSA and 738 Icelandic general population study participants. All participants answered the same questionnaires. Those reporting nGER symptoms at least once per week were defined as 'with nGER'; those without nGER symptoms and without nGER medication were defined as 'no nGER'; and other participants were defined as having 'possible nGER'. Propensity score-based weights were used to minimise confounding and selection bias and facilitate causal interpretations. RESULTS The prevalence of nGER among OSA patients was 14.1%, compared with 5.8% in the general population. This increased prevalence in OSA was not explained by differences in age, gender, body mass index, smoking, hypertension and diabetes (adjusted OR (95% CI)=3.79 (2.24 to 6.43)). OSA patients 'with nGER' and with 'possible nGER' reported more wheezing (44% and 44% vs 25%, respectively) and productive cough (47% and 42% vs 29%, respectively), compared with OSA patients with 'no nGER'. The same pattern was seen in the general population, although with a generally lower prevalence. The effect of nGER on respiratory symptoms was similar between the two cohorts. CONCLUSION nGER was more often reported among untreated moderate-severe OSA patients than in the general population. Participants with nGER had more wheezing and productive cough, both among untreated OSA patients and in the general population.
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Affiliation(s)
- Össur Ingi Emilsson
- Department of Medical Sciences: Respiratory, Allergy and Sleep Research, Uppsala University, Uppsala, Sweden
- Faculty of Medicine, University of Iceland School of Health Sciences, Reykjavik, Iceland
| | - Thor Aspelund
- Centre for Public Health Sciences, University of Iceland, Reykjavik, Iceland
| | - Christer Janson
- Department of Medical Sciences: Respiratory, Allergy and Sleep Research, Uppsala University, Uppsala, Sweden
| | - Bryndis Benediktsdottir
- Faculty of Medicine, University of Iceland School of Health Sciences, Reykjavik, Iceland
- Department of Sleep, Landspitali - The National University Hospital of Iceland, Reykjavik, Iceland
| | - Sigurdur Juliusson
- Department of Otolaryngology, Landspitali-The National University Hospital of Iceland, Reykjavik, Iceland
| | - Greg Maislin
- Department of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - Allan I Pack
- Department of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - Brendan T Keenan
- Department of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - Thorarinn Gislason
- Faculty of Medicine, University of Iceland School of Health Sciences, Reykjavik, Iceland
- Department of Sleep, Landspitali - The National University Hospital of Iceland, Reykjavik, Iceland
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Mir Fakhraei R, Lindberg E, Benediktsdóttir B, Svanes C, Johannessen A, Holm M, Modig L, Franklin KA, Malinovschi A, Gislason T, Jõgi R, Cramer C, Janson C, Emilsson ÖI. Gastroesophageal reflux and snoring are related to asthma and respiratory symptoms: Results from a Nordic longitudinal population survey. Respir Med 2024; 221:107495. [PMID: 38101459 DOI: 10.1016/j.rmed.2023.107495] [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: 08/06/2023] [Revised: 11/29/2023] [Accepted: 12/08/2023] [Indexed: 12/17/2023]
Abstract
AIM To study if individuals with nocturnal gastroesophageal reflux (nGER) and habitual snoring are more likely to develop asthma and respiratory symptoms (i.e. wheeze, cough, chest tightness, breathlessness) than those without these conditions, and if these associations are additive. METHODS We used data from the population-based prospective questionnaire study Respiratory Health in Northern Europe (RHINE) (11,024 participants), with data from 1999 and 2011. Participants with heartburn or belching after going to bed, at least 1 night/week, were considered to have nGER. Participants reporting loud snoring at least 3 nights/week were considered to have habitual snoring. Participants were grouped into four groups by their nGER and snoring status: "never"; "former"; "incident"; "persistent". Incident respiratory symptoms were analyzed among participants without respective symptom at baseline. RESULTS Snoring and nGER were independently associated with incident asthma and respiratory symptoms. The risk of incident wheeze was increased in subjects with incident or persistent snoring (adjusted odds ratio (95 % CI): 1.44 (1.21-1.72)), nGER (2.18 (1.60-2.98)) and in those with both snoring and nGER (2.59 (1.83-3.65)). The risk of developing asthma was increased in subjects with incident or persistent snoring (1.44 (1.15-1.82)), nGER (1.99 (1.35-2.93)) and in those with both snoring and nGER (1.72 (1.06-2.77)). No significant interaction was found between snoring and nGER. A similar pattern was found for the incidence of all other respiratory symptoms studied, with the highest risk among those with both incident or persistent nGER and snoring. CONCLUSION The risk of developing asthma and respiratory symptoms is increased among subjects with nGER and habitual snoring. These associations are independent of each other and confounding factors. Snoring and nGER together are additive on respiratory symptoms.
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Affiliation(s)
- Rima Mir Fakhraei
- Department of Medical Sciences, Respiratory, Allergy and Sleep Research, Uppsala University, Uppsala, Sweden
| | - Eva Lindberg
- Department of Medical Sciences, Respiratory, Allergy and Sleep Research, Uppsala University, Uppsala, Sweden
| | | | - Cecilie Svanes
- Centre for International Health, Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway; Department of Occupational Medicine, Haukeland University Hospital, Bergen, Norway
| | - Ane Johannessen
- Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
| | - Mathias Holm
- Department of Occupational and Environmental Medicine, University of Gothenburg, Sweden
| | - Lars Modig
- Department of Public Health and Clinical Medicine, Sustainable Health, Umeå University, Umeå, Sweden
| | - Karl A Franklin
- Department of Surgical and Perioperative Sciences, Umeå University, Umeå, Sweden
| | - Andrei Malinovschi
- Department of Medical Sciences: Clinical Physiology, Uppsala University, Uppsala, Sweden
| | - Thorarinn Gislason
- Faculty of Medicine, University of Iceland, Reykjavik, Iceland; Department of Sleep, Landspitali, University Hospital, Reykjavik, Iceland
| | - Rain Jõgi
- The Lung Clinic, Tartu University Hospital, Tartu, Estonia
| | - Christine Cramer
- Department of Public Health, Aarhus University, Aarhus, Denmark; Department of Occupational Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - Christer Janson
- Department of Medical Sciences, Respiratory, Allergy and Sleep Research, Uppsala University, Uppsala, Sweden
| | - Össur Ingi Emilsson
- Department of Medical Sciences, Respiratory, Allergy and Sleep Research, Uppsala University, Uppsala, Sweden; Faculty of Medicine, University of Iceland, Reykjavik, Iceland.
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Zhang C, Wei S, Wang Y, Yu K, Jin Z, Zhang M, Ma X, Zhang C, Zhang Q, Sun K, Zhou P, Zhong Y, Ma J, Liao J, Wang G. Association between preserved ratio impaired spirometry and sleep apnea in a Chinese community. Curr Med Res Opin 2023; 39:621-626. [PMID: 36847254 DOI: 10.1080/03007995.2023.2182531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
OBJECTIVE This study investigated the association between obstructive sleep apnea (OSA) and preserved ratio impaired spirometry (PRISm) in a community population. METHODS Baseline data from a prospective cohort study, the Predictive Value of Combining Inflammatory Biomarkers and Rapid Decline of FEV1 for COPD (PIFCOPD), were used for cross-sectional analysis. Participants aged 40-75 years were recruited from the community and their demographic information and medical history were collected. The STOP-Bang questionnaire (SBQ) was used to assess the risk of OSA. Pulmonary function tests were performed using a portable spirometer (COPD-6) and forced expiratory volume in 1 s (FEV1) and 6 s (FEV6) were measured. Routine blood, biochemical, high-sensitivity C-reactive protein (hs-CRP), and interleukin-6 tests were also performed. The pH of the exhaled breath condensate was determined. RESULTS A total of 1183 participants were enrolled, of which 221 with PRISm and 962 with normal lung function. The neck circumference, waist-to-hip ratio, hs-CRP concentration, proportion of males, cigarette exposure, number of current smoker, high risk of OSA, and prevalence of nasal and ocular allergy symptoms were significantly higher in the PRISm group than in the non-PRISm group (p < .05). Logistic regression showed that the risk of OSA (odds ratio, 1.883; 95% confidence interval, 1.245-2.848), waist-to-hip ratio, current smoking, and prevalence of nasal allergy symptoms were independently associated with PRISm after correcting for age and sex. CONCLUSION These findings showed that OSA prevalence is independently associated with PRISm prevalence. Further studies should confirm the relationship between systemic inflammation in OSA, localized inflammation of the airways, and impaired lung function.
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Affiliation(s)
- Cheng Zhang
- The Department of Respiratory and Critical Care Medicine, Peking University First Hospital, Beijing, China
| | - Shanshan Wei
- The Department of Respiratory and Critical Care Medicine, Peking University First Hospital, Beijing, China
| | - Yunxia Wang
- The Department of Respiratory and Critical Care Medicine, Peking University First Hospital, Beijing, China
| | - Kunyao Yu
- The Department of Respiratory and Critical Care Medicine, Peking University First Hospital, Beijing, China
| | - Zhe Jin
- The Department of Respiratory and Critical Care Medicine, Peking University First Hospital, Beijing, China
| | - Meng Zhang
- The Department of Respiratory and Critical Care Medicine, Peking University First Hospital, Beijing, China
| | - Xiaoyu Ma
- The Department of Respiratory and Critical Care Medicine, Peking University First Hospital, Beijing, China
| | - Chunbo Zhang
- The Department of Respiratory and Critical Care Medicine, Peking University First Hospital, Beijing, China
| | - Qi Zhang
- The Department of Respiratory and Critical Care Medicine, Peking University First Hospital, Beijing, China
| | - Kunyan Sun
- The Department of Respiratory and Critical Care Medicine, Peking University First Hospital, Beijing, China
| | - Peining Zhou
- The Department of Respiratory and Critical Care Medicine, Peking University First Hospital, Beijing, China
| | - Yijue Zhong
- The Department of Respiratory and Critical Care Medicine, Peking University First Hospital, Beijing, China
| | - Jing Ma
- The Department of Respiratory and Critical Care Medicine, Peking University First Hospital, Beijing, China
| | - Jiping Liao
- The Department of Respiratory and Critical Care Medicine, Peking University First Hospital, Beijing, China
| | - Guangfa Wang
- The Department of Respiratory and Critical Care Medicine, Peking University First Hospital, Beijing, China
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Ruan Z, Li D, Cheng X, Jin M, liu Y, Qiu Z, Chen X. The association between sleep duration, respiratory symptoms, asthma, and COPD in adults. Front Med (Lausanne) 2023; 10:1108663. [PMID: 37138746 PMCID: PMC10150117 DOI: 10.3389/fmed.2023.1108663] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 03/27/2023] [Indexed: 05/05/2023] Open
Abstract
Introduction The association between sleep duration and cough, wheezing, and dyspnea was unclear. This research aimed to test this relationship. Methods Research data were obtained from people who participated in the National Health and Nutrition Examination Survey (NHANES) from 2005 to 2012. We used weighted logistic regression analysis and fitted curves to explore the association between sleep and respiratory symptoms. In addition, we investigated the association between sleep duration, chronic obstructive pulmonary disease (COPD), and asthma. The stratified analysis is used to analyze inflection points and specific populations. Results The 14,742 subjects are weighted to reflect the 45,678,491 population across the United States. Weighted logistic regression and fitted curves show a U-shaped relationship between sleep duration and cough and dyspnea. This U-shaped relationship remained in people without COPD and asthma. The stratified analysis confirmed that sleep duration before 7.5 h was negatively associated with cough (HR 0.80, 95% CI 0.73-0.87) and dyspnea (HR 0.82, 95% CI 0.77-0.88). In contrast, it was positively associated with cough and (HR 1.30, 95% CI 1.14-1.48) dyspnea (HR 1.12, 95% CI 1.00-1.26) when sleep duration was >7.5 h. In addition, short sleep duration is associated with wheezing, asthma, and COPD. Conclusion Both long and short sleep duration are associated with cough and dyspnea. And short sleep duration is also an independent risk factor for wheezing, asthma, and COPD. This finding provides new insights into the management of respiratory symptoms and diseases.
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Affiliation(s)
- Zhishen Ruan
- The First Clinical College, Shandong Chinese Medical University, Jinan, China
| | - Dan Li
- The First Clinical College, Shandong Chinese Medical University, Jinan, China
| | - Xiaomeng Cheng
- College of Traditional Chinese Medicine, Shandong Chinese Medical University, Jinan, China
| | - Minyan Jin
- The First Clinical College, Shandong Chinese Medical University, Jinan, China
| | - Ying liu
- College of Traditional Chinese Medicine, Shandong Chinese Medical University, Jinan, China
| | - Zhanjun Qiu
- The First Clinical College, Shandong Chinese Medical University, Jinan, China
- Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China
- *Correspondence: Zhanjun Qiu,
| | - Xianhai Chen
- The First Clinical College, Shandong Chinese Medical University, Jinan, China
- Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China
- Xianhai Chen,
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5
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Kurin M, Shibli F, Kitayama Y, Kim Y, Fass R. Sorting out the Relationship between Gastroesophageal Reflux Disease and Sleep. Curr Gastroenterol Rep 2021; 23:15. [PMID: 34338891 DOI: 10.1007/s11894-021-00815-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/25/2021] [Indexed: 12/14/2022]
Abstract
PURPOSE OF REVIEW Gastroesophageal reflux disease is one of the most common conditions encountered by primary care physicians, gastroenterologists, foregut surgeons and otolaryngologists. While approximately 50% of patients experience nocturnal reflux symptoms, the relationship between gastroesophageal reflux disease and sleep is often overlooked. The aim of this review is to provide an update on the current understanding of this relationship and its clinical implications. Recent studies pertaining to the association between GERD and sleep with focus on sleep disturbances, obstructive sleep apnea, extraesophageal manifestations of GERD and treatment are discussed. RECENT FINDINGS There is a close relationship between GERD and sleep disturbances, but the nature of this relationship remains to be elucidated. Similarly, new data supports the association between GERD and obstructive sleep apnea, but whether this association is independent of confounding risk factors remains unresolved. Extraesophageal manifestations due to nocturnal GERD are primarily respiratory and can be explained by microaspiration and vagally-induced bronchospasm. Treatment of nocturnal GERD, both pharmacologically and surgically, improves sleep quality. Conversely, pharmacologic treatment of sleep disorders can improve nocturnal GERD symptoms. There is a bi-directional relationship between GERD and sleep. GERD is associated with various sleep disturbances. Sleep deficiency can exacerbate GERD. There is an association between extraesophageal manifestations and nocturnal GERD. Treatment directed towards GERD can improve sleep experience, and treatment directed to improve sleep can improve GERD symptoms.
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Affiliation(s)
- Michael Kurin
- Digestive Health Institute, Division of Gastroenterology and Hepatology, University Hospitals Cleveland Medical Center, Cleveland, OH, USA
| | - Fahmi Shibli
- The Esophageal and Swallowing Center, Division of Gastroenterology and Hepatology, MetroHealth Medical Center, Case Western Reserve University, 2500 MetroHealth Drive, Cleveland, OH, 44109, USA
| | - Yoshitaka Kitayama
- The Esophageal and Swallowing Center, Division of Gastroenterology and Hepatology, MetroHealth Medical Center, Case Western Reserve University, 2500 MetroHealth Drive, Cleveland, OH, 44109, USA
| | - Yeseong Kim
- The Esophageal and Swallowing Center, Division of Gastroenterology and Hepatology, MetroHealth Medical Center, Case Western Reserve University, 2500 MetroHealth Drive, Cleveland, OH, 44109, USA
| | - Ronnie Fass
- The Esophageal and Swallowing Center, Division of Gastroenterology and Hepatology, MetroHealth Medical Center, Case Western Reserve University, 2500 MetroHealth Drive, Cleveland, OH, 44109, USA.
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Emilsson ÖI, Sundbom F, Ljunggren M, Benediktsdottir B, Garcia-Aymerich J, Bui DS, Jarvis D, Olin AC, Franklin KA, Demoly P, Lindberg E, Janson C, Aspelund T, Gislason T. Association between lung function decline and obstructive sleep apnoea: the ALEC study. Sleep Breath 2020; 25:587-596. [PMID: 32632893 PMCID: PMC8195766 DOI: 10.1007/s11325-020-02086-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 03/31/2020] [Accepted: 04/13/2020] [Indexed: 11/25/2022]
Abstract
Purpose To study changes in lung function among individuals with a risk of obstructive sleep apnoea (OSA), and if asthma affected this relationship. Methods We used data from the European Community Respiratory Health Survey II and III, a multicentre general population study. Participants answered questionnaires and performed spirometry at baseline and 10-year follow-up (n = 4,329 attended both visits). Subjects with high risk for OSA were identified from the multivariable apnoea prediction (MAP) index, calculated from BMI, age, gender, and OSA symptoms at follow-up. Asthma was defined as having doctor’s diagnosed asthma at follow-up. Primary outcomes were changes in forced expiratory volume in 1 s (FEV1) and forced vital capacity (FVC) from baseline to follow-up. Results Among 5108 participants at follow-up, 991 (19%) had a high risk of OSA based on the MAP index. Participants with high OSA risk more often had wheeze, cough, chest tightness, and breathlessness at follow-up than those with low OSA risk. Lung function declined more rapidly in subjects with high OSA risk (low vs high OSA risk [mean ± SD]: FEV1 = − 41.3 ± 24.3 ml/year vs − 50.8 ± 30.1 ml/year; FVC = − 30.5 ± 31.2 ml/year vs − 45.2 ± 36.3 ml/year). Lung function decline was primarily associated with higher BMI and OSA symptoms. OSA symptoms had a stronger association with lung function decline among asthmatics, compared to non-asthmatics. Conclusion In the general population, a high probability of obstructive sleep apnoea was related to faster lung function decline in the previous decade. This was driven by a higher BMI and more OSA symptoms among these subjects. The association between OSA symptoms and lung function decline was stronger among asthmatics. Electronic supplementary material The online version of this article (10.1007/s11325-020-02086-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Össur Ingi Emilsson
- Department of Respiratory, Allergy and Sleep Research, Akademiska Sjukhuset, Uppsala University, 751 85, Uppsala, Sweden. .,Department of Respiratory Medicine and Allergology, Akademiska Sjukhuset, Uppsala, Sweden.
| | - Fredrik Sundbom
- Department of Respiratory, Allergy and Sleep Research, Akademiska Sjukhuset, Uppsala University, 751 85, Uppsala, Sweden.,Department of Respiratory Medicine and Allergology, Akademiska Sjukhuset, Uppsala, Sweden
| | - Mirjam Ljunggren
- Department of Respiratory, Allergy and Sleep Research, Akademiska Sjukhuset, Uppsala University, 751 85, Uppsala, Sweden.,Department of Respiratory Medicine and Allergology, Akademiska Sjukhuset, Uppsala, Sweden
| | - Bryndis Benediktsdottir
- Department of Sleep Medicine, Landspitali, Reykjavik, Iceland.,Faculty of Medicine, University of Iceland, Reykjavik, Iceland
| | - Judith Garcia-Aymerich
- ISGlobal, Barcelona, Spain.,Universitat Pompeu Fabra (UPF), Barcelona, Spain.,CIBER Epidemiología y Salud Pública (CIBERESP), Barcelona, Spain
| | - Dinh Son Bui
- Allergy and Lung Health Unit, Centre for Epidemiology and Biostatistics, University of Melbourne, Melbourne, Australia
| | - Deborah Jarvis
- National Heart and Lung Institute, Imperial College London, London, UK
| | - Anna-Carin Olin
- Unit of Occupational and Environmental Medicine, University of Gothenburg, Gothenburg, Sweden
| | - Karl A Franklin
- Department of Surgical and Perioperative Sciences, Umeå University, Umeå, Sweden
| | - Pascal Demoly
- Department of Pulmonology, Division of Allergy, Hôpital Arnaud de Villeneuve, University Hospital of Montpellier, Montpellier, France.,Inserm, Sorbonne Université, Equipe EPAR - IPLESP, Paris, France
| | - Eva Lindberg
- Department of Respiratory, Allergy and Sleep Research, Akademiska Sjukhuset, Uppsala University, 751 85, Uppsala, Sweden.,Department of Respiratory Medicine and Allergology, Akademiska Sjukhuset, Uppsala, Sweden
| | - Christer Janson
- Department of Respiratory, Allergy and Sleep Research, Akademiska Sjukhuset, Uppsala University, 751 85, Uppsala, Sweden.,Department of Respiratory Medicine and Allergology, Akademiska Sjukhuset, Uppsala, Sweden
| | - Thor Aspelund
- Centre for Public Health Sciences, University of Iceland, Reykjavik, Iceland
| | - Thorarinn Gislason
- Department of Sleep Medicine, Landspitali, Reykjavik, Iceland.,Faculty of Medicine, University of Iceland, Reykjavik, Iceland
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Bjornsdottir E, Lindberg E, Benediktsdottir B, Gislason T, Garcia Larsen V, Franklin K, Jarvis D, Demoly P, Perret JL, Garcia Aymerich J, Arenas SD, Heinrich J, Torén K, Jögi R, Janson C. Are symptoms of insomnia related to respiratory symptoms? Cross-sectional results from 10 European countries and Australia. BMJ Open 2020; 10:e032511. [PMID: 32350008 PMCID: PMC7213858 DOI: 10.1136/bmjopen-2019-032511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
OBJECTIVES To compare the prevalence of different insomnia subtypes among middle-aged adults from Europe and Australia and to explore the cross-sectional relationship between insomnia subtypes, respiratory symptoms and lung function. DESIGN Cross-sectional population-based, multicentre cohort study. SETTING 23 centres in 10 European countries and Australia. METHODS We included 5800 participants in the third follow-up of the European Community Respiratory Health Survey III (ECRHS III) who answered three questions on insomnia symptoms: difficulties falling asleep (initial insomnia), waking up often during the night (middle insomnia) and waking up early in the morning and not being able to fall back asleep (late insomnia). They also answered questions on smoking, general health and chronic diseases and had the following lung function measurements: forced expiratory volume in 1 s (FEV1), forced vital capacity (FVC) and the FEV1/FVC ratio. Changes in lung function since ECRHS I about 20 years earlier were also analysed. MAIN OUTCOME MEASURES Prevalence of insomnia subtypes and relationship to respiratory symptoms and function. RESULTS Overall, middle insomnia (31.2%) was the most common subtype followed by late insomnia (14.2%) and initial insomnia (11.2%). The highest reported prevalence of middle insomnia was found in Iceland (37.2%) and the lowest in Australia (22.7%), while the prevalence of initial and late insomnia was highest in Spain (16.0% and 19.7%, respectively) and lowest in Denmark (4.6% and 9.2%, respectively). All subtypes of insomnia were associated with significantly higher reported prevalence of respiratory symptoms. Only isolated initial insomnia was associated with lower FEV1, whereas no association was found between insomnia and low FEV1/FVC ratio or decline in lung function. CONCLUSION There is considerable geographical variation in the prevalence of insomnia symptoms. Middle insomnia is most common especially in Iceland. Initial and late insomnia are most common in Spain. All insomnia subtypes are associated with respiratory symptoms, and initial insomnia is also associated with lower FEV1.
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Affiliation(s)
- Erla Bjornsdottir
- Haskolinn i Reykjavik, Reykjavik, Iceland
- Faculty of Medicine, School of Health Sciences, University of Iceland, Reykjavik, Iceland
| | - Eva Lindberg
- Respiratory Medicine and Allegology, Uppsala University, Uppsala, Sweden
| | - Bryndis Benediktsdottir
- Faculty of Medicine, School of Health Sciences, University of Iceland, Reykjavik, Iceland
- Department of Respiratory Medicine and Sleep, Landspitali - The National University Hospital of Iceland, Reykjavik, Iceland
| | - Thorarinn Gislason
- Faculty of Medicine, School of Health Sciences, University of Iceland, Reykjavik, Iceland
| | | | - Karl Franklin
- Department of Surgery, Surgical and Perioperative Sciences, Umeå, Sweden
| | - Debbie Jarvis
- Department of Respiratory Epidemiology and Public Health, Imperial College, London, UK
| | - Pascal Demoly
- Pneumology Department, University Hospital of Montpellier, Montpellier, France
| | | | - Judith Garcia Aymerich
- Centre for Research in Environmental Epidemiology (CREAL), Instituto de Salud Global Barcelona, Barcelona, Catalunya, Spain
| | - Sandra Dorado Arenas
- Pulmonology Department, Hospital Galdakao-Usansolo, Galdacano, País Vasco, Spain
| | - Joachim Heinrich
- Institute and Outpatient Clinic for Occupational, Social and Environmental Medicine, Clinical Center, Ludwig Maximilians University, Comprehensive Pneumology Centre Munich, German Centre for Lung Research, Muenchen, Germany
| | - Kjell Torén
- Department of Occupational and Environmental Medicine, University of Gothenburg, Gothenburg, Sweden
| | | | - Christer Janson
- Department of Respiratory Medicine, Uppsala University, Uppsala, Sweden
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