Shift work and the incidence of injury among police officers.
Violanti-JM; Fekedulegn-D; Andrew-ME; Charles-LE; Hartley-TA; Vila-B; Burchfiel-CM
Am J Ind Med 2012 Mar; 55(3):217-227
Background: 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. Methods: 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. Results: 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). Conclusions: 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.
Law-enforcement-workers; Police-officers; Shift-work; Shift-workers; Occupational-accidents; Injuries; Risk-analysis; Work-analysis; Statistical-analysis; Age-factors; Sleep-deprivation; Fatigue; Accident-potential; Physical-reactions;
Author Keywords: police; occupational injury; shift work; work hours; fatigue; sleep; activity levels
Dr. John M.Violanti, PhD, School of Public Health and Health Professions, State University of New York at Buffalo, Buffalo, NY 14260
Services: Public Safety
American Journal of Industrial Medicine