From the abstract:
Night work and prolonged work hours increase the risk for workplace aggression, however, the risk related to precarious schedules remains unknown.
Cross-sectional study among Parole Probation Officers (PPOs) (n = 35). A precarious schedules index was created including the following indicators (a) experiencing one or more unexpected shifts during the last 4 weeks; (b) having minimal control over work hours; and (c) shifts notifications of less than a week. Generalized Poisson Regressions estimated the association between precarious schedules and self-reported client-based aggressive incidents (verbal, threating, property, or physical) during the last 12 months.
Workplace aggression was highly prevalent (94.3%). PPOs who experienced precarious schedules (74.3% prevalence) had an adjusted rate of workplace aggression 1.55 times greater than PPOs without precarious schedules (IRR = 1.55, 95% CI 1.25, 1.97, P < 0.001). Conclusions Precarious schedules were associated with workplace aggression. Further research ought to examine whether improving schedule predictability may reduce client-based aggression.