Study protocol for examining long working hours and night work as risk factors for injuries

The understanding of the impact of shift work and long working hours on the risk of injuries remains incomplete. Many of the existing studies include small sample sizes, unique industries, only men etc. limiting the generalisability of the findings. The present study protocol therefore presents the aims, hypotheses, material and methods for studies of long working hours or night work on the risk of hospital treatment or death due to injuries when taking gender, age, industry, and socioeconomic status into account.