title: Evening chronotypes have the increased odds for bronchial asthma and nocturnal asthma.
abstract: Earlier studies have found associations of chronotypes with a range of health-related factors. In the light of these findings, the behavioral trait of eveningness in particular associates with determinants that might have a negative impact on health. In this study, based on a random sample of population aged 25-74 years living in five large geographical areas in Finland (N = 6089), we tested whether the evening chronotypes have the increased odds for respiratory symptoms and diseases. As a result, after controlling for socio-demographic and lifestyle factors, evening-types had wheezy breathing without respiratory infection, a diagnosed or treated bronchial asthma, awoken in shortness of breath, awoken in heavy to breath, wheezy breathing with dyspnea, wheezy breathing as such and medication for asthma more often than morning-types (odds ratios (ORs) of 1.5-1.9) and intermediate-types (ORs of 1.3-1.6). In addition, evening-types had current medication for asthma, and awoken in coughing more often (OR = 1.5 and OR = 1.4, respectively) than morning-types. Evening-types did not have a diagnosed or treated chronic bronchitis more frequently than others. Our results suggest that the behavioral trait of eveningness associates with the increased odds for the bronchial asthma and nocturnal asthma in particular.
authors.affiliation: Department of Mental Health and Substance Abuse Services, National Institute for Health and Welfare , Helsinki , Finland .
authors.forename: Ilona
authors.initials: I
authors.lastname: Merikanto
authors.forename: Ani
authors.initials: A
authors.lastname: Englund
authors.forename: Erkki
authors.initials: E
authors.lastname: Kronholm
authors.forename: Tiina
authors.initials: T
authors.lastname: Laatikainen
authors.forename: Markku
authors.initials: M
authors.lastname: Peltonen
authors.forename: Erkki
authors.initials: E
authors.lastname: Vartiainen
authors.forename: Timo
authors.initials: T
authors.lastname: Partonen
mesh_terms: D000328:Adult; D000368:Aged; D001249:Asthma / Q000453:epidemiology* / Q000503:physiopathology; D002940:Circadian Rhythm; D005260:Female; D005387:Finland; D006306:Health Surveys; D006801:Humans; D008019:Life Style; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D012135:Respiratory Sounds; D012307:Risk Factors; D012890:Sleep / Q000502:physiology; D012907:Smoking / Q000009:adverse effects; D011795:Surveys and Questionnaires