Predictors of Long-Term Sick Leave In The Workplace.

To the Editor: D uchemin et al 1 conducted a repeated survey to elucidate factors impacting the occurrence of sick leave with special reference to duration. The authors recognized that the main determinants of longterm sick leaves more than a month were perceived health and supervisor acknowledgment in the workplace. In contrast, very short-term leave within 3 days were explained by sociodemographic covariates. To prevent long-term sick leaves at the workplace, monitoring perceived health level and improving supervisor acknowledgment might be effective in this population. I have two concerns about their study. First, Vedaa et al investigated the effects of long working hours ( h shifts) on subsequent sick leave. A total of 1538 nurses participated in this study and 3-month follow-up was conducted. Adjusted incidence rate ratio (IRR) (95% confidence interval [CI]) of long working hours for sick leave was 0.946 (0.919 to