Prevalence of shift work disorder among hospital personnel: A cross‐sectional study using objective working hour data

ICSD-3-based prevalence of shift work disorder (SWD) among permanent night workers is 6.0%.

• SWD prevalence varied between 2.5%-3.7% for shift workers without night shifts and 2.6%-9.5% for those with night shifts, depending on the number of non-day shifts considered.
• ICSD-2 criteria indicated higher SWD prevalence rates, with values reaching 9.2% for shift workers without nights and 33.5% for those with nights.
• Significantly more shift workers with nights exhibited fatigue on days off when experiencing ≥3 days of ICSD-3-based SWD symptoms per month (49.3% vs. 35.8%).
• The analysis suggests a minimum cut-off of ≥3 days with SWD symptoms per month for estimating prevalence.
• The findings indicate that using ICSD-3 criteria provides lower prevalence estimates compared to ICSD-2.

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