Sleep duration and sleep difficulties as predictors of occupational injuries: a cohort study

Author:

Alhainen MariaORCID,Härmä Mikko,Pentti Jaana,Ervasti Jenni MORCID,Kivimäki Mika,Vahtera JussiORCID,Stenholm SariORCID

Abstract

Study objectivesTo examine the association between sleep duration and sleep difficulties with different types and causes of workplace and commuting injuries.MethodsThe data were derived from the Finnish Public Sector study including 89.543 participants (178.309 person-observations). Participants reported their sleep duration and sleep difficulties between 2000 and 2012. These were linked to occupational injury records from the national register maintained by the Federation of Accident Insurance Institutions. Risk of injuries was followed up 1 year after each study wave. Logistic regression analysis with generalised estimating equations (GEEs) was used to examine the association between sleep duration/difficulties and risk of injuries, and multinomial logistic regression with GEE was used to examine the association with injury types and causes.ResultsBoth sleep duration and difficulties were associated with injuries. Employees with short sleep (≤6.5 hours) had 1.07-fold odds of workplace injuries (95% CI 1.00 to 1.14) and 1.14 times higher odds of commuting injuries (95% CI 1.04 to 1.26) compared with employees with normal sleep duration. For employees with disturbed sleep, the corresponding ORs were 1.09-fold (95% CI 1.02 to 1.17) and 1.14-fold (95% CI 1.04 to 1.26) compared with those without sleep difficulties, respectively. The risk of commuting injuries was higher among those who had difficulty in falling asleep (OR 1.29, 95% CI 1.07 to 1.55), woke up too early (OR 1.11, 95% CI 1.00 to 1.23) or had non-restorative sleep (OR 1.18, 95% CI 1.05 to 1.33).ConclusionsShort sleep duration and sleep difficulties are associated with slightly increased risk of workplace and commuting injuries.

Funder

Academy of Finland

NordForsk

Publisher

BMJ

Subject

Public Health, Environmental and Occupational Health

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