A cross-sectional study of the association between working hours and sleep duration among the Japanese working population

Tadahiro Ohtsu, Yoshitaka Kaneita, Sayaka Aritake, Kazuo Mishima, Makoto Uchiyama, Tsuneto Akashiba, Naohisa Uchimura, Shigeyuki Nakaji, Takeshi Munezawa, Akatsuki Kokaze, Takashi Ohida

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Objectives: This study aimed to clarify the association between long working hours and short sleep duration among Japanese workers. Methods: We selected 4,000 households from across Japan by stratified random sampling and conducted an interview survey of a total of 662 participants (372 men; 290 women) in November 2009. Logistic regression analyses were performed using "sleep duration < 6 hours per day" as a dependent variable to examine the association between working hours/overtime hours and short sleep duration. Results: When male participants who worked for ≥ 7 but < 9 hours per day were used as a reference, the odds ratio (OR) for short sleep duration in those who worked for ≥ 11 hours was 8.62 (95% confidence interval [CI]: 3.94-18.86). With regard to overtime hours among men, when participants without overtime were used as a reference, the OR for those whose period of overtime was ≥ 3 hours but < 4 hours was 3.59 (95% CI: 1.42-9.08). For both men and women, those with long weekday working hours tended to have a short sleep Durationduration during weekdays and holidays. Conclusions: It is essential to avoid working long hours in order to prevent short sleep duration.

Original languageEnglish
Pages (from-to)307-311
Number of pages5
JournalJournal of Occupational Health
Volume55
Issue number4
Publication statusPublished - 2013
Externally publishedYes

Keywords

  • Holiday
  • Overtime hours
  • Sleep duration
  • Weekday
  • Working hours

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health

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    Ohtsu, T., Kaneita, Y., Aritake, S., Mishima, K., Uchiyama, M., Akashiba, T., Uchimura, N., Nakaji, S., Munezawa, T., Kokaze, A., & Ohida, T. (2013). A cross-sectional study of the association between working hours and sleep duration among the Japanese working population. Journal of Occupational Health, 55(4), 307-311.