Janitor workload and occupational injuries

Source: Deirdre R. Green, Susan G. Gerberich, Hyun Kim, Andrew D. Ryan, Patricia M. McGovern, Timothy R. Church, Adam Schwartz, Rony F. Arauz, American Journal of Industrial Medicine, Early View, First published: 24 January 2019
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From the abstract:
This study was designed to identify potential effects of workload and sleep on injury occurrence.

Questionnaires were disseminated to janitors in the SEIU Local 26 union; 390 responded and provided information on workload, sleep, and injury outcomes. Quantitative measurements of workload and sleep were collected via FitBit devices from a subset of 58 janitors. Regression techniques were implemented to determine risk.

Thirty‐seven percent reported increased workload over the study period Adjusted analyses indicated a significant effect of change in workload (RR: 1.94; 95%CI: 1.40‐2.70) and sleep hours (RR: 2.21; 95%CI: 1.33‐3.66) on occupational injury. Among those with sleep disturbances, injury risk was greater for those with less than five, versus more than five, days of moderate to vigorous physical activity; RR: 2.77; 95%CI: 1.16‐6.59).

Increased workload and sleep disturbances increased the risk of injury, suggesting employers should address these factors to mitigate occupational injuries.