Conflict of Interest: The authors have no conflict of interest or affiliations with any organizations that have a direct interest, including financial interest, in the subject matter.
Shift work and the incidence of injury among police officers†
Version of Record online: 6 JAN 2012
Copyright © 2012 Wiley Periodicals, Inc.
American Journal of Industrial Medicine
Volume 55, Issue 3, pages 217–227, March 2012
How to Cite
Violanti, J. M., Fekedulegn, D., Andrew, M. E., Charles, L. E., Hartley, T. A., Vila, B. and Burchfiel, C. M. (2012), Shift work and the incidence of injury among police officers. Am. J. Ind. Med., 55: 217–227. doi: 10.1002/ajim.22007
- Issue online: 8 FEB 2012
- Version of Record online: 6 JAN 2012
- Manuscript Accepted: 12 DEC 2011
- National Institute for Occupational Safety and Health (NIOSH). Grant Number: 200-2003-01580
- occupational injury;
- shift work;
- work hours;
- activity levels
Police officers may be injury prone due to fatigue, erratic work hours, and insufficient sleep. This study explored injury incidence among police officers across shifts.
Day-to-day shift data from computerized payroll records (1994–2010) were available from a mid-sized urban police department (n = 430). Sleep duration, shift activity level, returning to work after days off, and injury incidence over time were also examined.
Age-adjusted incidence rate ratio (IRR) for injury on the midnight shift was 72% larger than the day shift (IRR = 1.72; 95% CI = 1.26–2.36) and 66% larger than the afternoon shift (IRR = 1.66; 95% CI = 1.23–2.25). Injury incidence for the first day back on the midnight shift was 69% larger than day shift (IRR = 1.69; 95% CI = 1.23–2.32) and 54% larger than the afternoon shift (IRR = 1.54; 95% CI = 1.36–1.76). High activity level combined with midnight shift work put officers at increased injury risk (IRR = 2.31; P = 0.0003). Probability of remaining free of injury was significantly higher for day shift than midnight shift (P < 0.0001).
Higher injury risk was associated with night shift work in police officers. Night shift combined with high work activity was strongly associated with injury risk. There was a significantly higher probability of not being injured on day compared to midnight or afternoon shifts. Am. J. Ind. Med. 55:217–227, 2012. © 2011 Wiley Periodicals, Inc.