Effects of long work hours and poor sleep characteristics on workplace injury among full-time male employees of small- and medium-scale businesses

Details

• Personal Author:
  Nakata A ; Nakata A
• Description:
  The aim of this study was to investigate the effects of long work hours and poor sleep characteristics on workplace injury. A total of 1891 male employees, aged 18-79 years (mean 45 years), in 296 small- and medium-scale businesses in a suburb of Tokyo were surveyed by means of a self-administered questionnaire during August-December 2002. Work hours and sleep characteristics, including daily sleep hours, subjective sleep sufficiency, sleep quality and easiness to wake up in the morning, were evaluated. Information on workplace injury in the past 1-year period was self-reported. The risk of workplace injury associated with work hours and poor sleep was estimated using multivariate logistic regression with odds ratio (ORs) and 95% confidence intervals as measures of associations. Compared with those working 6-8 h day-1 with good sleep characteristics, positive interactive effects for workplace injury were found between long work hours (>8-10 h day-1 or >10 h day-1) and short sleep duration (<6 h) [adjusted OR (aOR), 1.27-1.54], subjective insufficient sleep (aOR, 1.94-1.99), sleep poorly at night (aOR, 2.23-2.49) and difficulty waking up in the morning (aOR, 1.56-1.59). Long work hours (aOR, 1.31-1.48), subjective insufficient sleep (aOR, 1.49) and sleeping poorly at night (aOR, 1.72) were also independently associated with workplace injury. This study suggests that long work hours coupled with poor sleep characteristics are synergistically associated with increased risk of workplace injury. Greater attention should be paid to manage/treat poor sleep and reduce excessive work hours to improve safety at the workplace. [Description provided by NIOSH]
• Subjects:
  Men Occupational Health Risk Assessment Risk Factors Safety Shift Work Schedule Sleep Sleep Initiation And Maintenance Disorders Small Business Surveys And Questionnaires Workplace

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• Keywords:
  Author Keywords: Overtime Health-surveys Injuries Mathematical-models Questionnaires Risk-analysis Risk-factors Safety Shift-work Shift-workers Sleep Sleep-deprivation Small- And Medium-scale Business Small-businesses Synergism Work-analysis Work-intervals Worker-health Work Hours Workplace-studies Workplace Injury

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• ISSN:
  0962-1105
• Document Type:
  Text
• Genre:
  Journal Article ; Journal Article
• Place as Subject:
  Ohio ; OSHA Region 5
• CIO:
  National Institute for Occupational Safety and Health (NIOSH) ; National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DART - Division of Applied Research and Technology ; DART - Division of Applied Research and Technology
• Topic:
  Workplace Safety & Health ; Workplace Safety & Health
• Location:
  North America ; North America
• Volume:
  20
• Issue:
  4
• NIOSHTIC Number:
  nn:20038294
• Citation:
  J Sleep Res 2011 Dec; 20(4):576-584
• Contact Point Address:
  Akinori Nakata, PhD, National Institute for Occupational Safety and Health, Division of Applied Research and Technology, MS-C24, 4676 Columbia Parkway, Cincinnati, OH 45226, USA
• Email:
  cji5@cdc.gov
• Federal Fiscal Year:
  2012
• NORA Priority Area:
  Services ; Services
• Peer Reviewed:
  True
• Source Full Name:
  Journal of Sleep Research
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:b436f4fc91fd7f595db5666bf119e5be8d91f59b37fb8b79ad9794c042dc4fd32f60bdb01e48c86f35f6052969626eaf483aa393b969060d2523c22b8934343e
• Download URL:
  https://stacks.cdc.gov/view/cdc/192054/cdc_192054_DS1.pdf
• File Type:
  [PDF - 101.91 KB ]