Sleep, Obesity, and Injury Among US Male Career Firefighters.

Abstract

The aim of this study was to determine the role of obesity on the association between sleep and on-duty injury among male career firefighters. Data on 1419 male career firefighters for this cross-sectional study came from two firefighter cohorts from 2008 to 2013. On-duty injury within the past 6 to 12 months was the dependent variable and getting enough sleep was the independent variable. A multivariable, mixed effect logistic regression model stratified by body mass index (BMI) categories was created to examine the presence of effect measure modification. Only obese firefighters who did not get enough sleep were twice as likely to have an on-duty injury than those who got enough sleep. This association was not significant among normal or overweight firefighters. Future studies into on-duty injury and sleep should examine body composition as an effect modifier among career firefighters.