Results The response rate was 44.8% (n=558). After excluding ineligible responses, the final
sample comprised 515 teachers (335 males and 180 females). Sleep problems was identified in
41.5% of males and 44.4% of females. Our results showed a significantly increased risk of sleep
problems in males working >60 hours per week (OR 2.05 [95% CI 1.01–4.30]) compared with
those working ≤40 hours per week. No significant association was found in females.