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Clinically diagnosed insomnia and risk of all-cause and diagnosis-specific sickness absence: a nationwide Swedish prospective cohort study.
Stockholm University, Faculty of Social Sciences, Stress Research Institute. (Biologisk psykologi och behandlingsforskning)
Stockholm University, Faculty of Social Sciences, Stress Research Institute. (Biologisk psykologi och behandlingsforskning)
2013 (English)In: Scandinavian Journal of Public Health, ISSN 1403-4948, E-ISSN 1651-1905, Vol. 41, no 7, 712-721 p.Article in journal (Refereed) Published
Abstract [en]

Aims: Insomnia is a large health problem. In some prior studies, positive associations between insomnia symptoms and sickness absence have been observed. There is, however, no previous nationwide cohort study of clinically diagnosed insomnia and risk of incident sickness absence. Methods: Prospective nationwide cohort study based on Swedish population-based registers including all 4,956,358 individuals registered as living in Sweden on 31 December 2004/2005, aged 17-64 years, not on disability pension, old-age pension or on-going sickness absence. Those having insomnia inpatient or outpatient care, defined as having at least one admission/specialist visit with a main or secondary diagnosis of disorders of initiating and maintaining sleep [insomnias] (ICD-10: G47.0) during 2000/2001-2005, were compared to those with no such care. All-cause and diagnosis-specific incident sickness absence were followed during 2006-2010. Incidence rate ratios (IRRs) and 95% confidence intervals (CIs) were estimated by Cox proportional hazards regression. Results: In models adjusted for prior sickness absence, socio-demographic factors and inpatient and specialized outpatient care, associations between insomnia and increased risks of all-cause sickness absence (IRR 1.18, 95% CI 1.04-1.35) and sickness absence due to mental diagnoses (IRR 1.75, 95% CI 1.36-2.25) were observed. After further adjustment for insomnia medications these associations disappeared. No associations between insomnia and risk of sickness absence due to cancer, circulatory or musculoskeletal diagnoses, or injuries, were observed. Conclusions: In this nationwide cohort study, we observed increased risks of all-cause sickness absence and sickness absence due to mental diagnoses after adjustment for several potential confounders that disappeared after further adjustment for insomnia medications.

Place, publisher, year, edition, pages
Umeå: Epidemiology, Department of Public Health and Clinical Medicine, Umeå University , 2013. Vol. 41, no 7, 712-721 p.
Keyword [en]
Cohort study, epidemiology, sick leave, sleep disorder
National Category
Medical and Health Sciences Environmental Health and Occupational Health
Identifiers
URN: urn:nbn:se:su:diva-95402DOI: 10.1177/1403494813498003ISI: 000325534500008PubMedID: 23868492Local ID: P3031OAI: oai:DiVA.org:su-95402DiVA: diva2:659893
Note

Funding agencies:

Swedish Council for Working Life and Social Research 2009-1758, 2007-1762; Stockholm Stress Center 2007-1762

Available from: 2013-10-28 Created: 2013-10-28 Last updated: 2017-12-06Bibliographically approved

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