Statistical methods
mental disorder
Chi-square analysis was performed to compare the active and control arms on demographic characteristics including age, gender, and directorate. Chi-square analysis and unadjusted odds ratios (OR) with 95% confidence intervals (95% CI) were used to compare the treatment arms on the number of “all sickness” and “mental disorder” days taken as sick leave between two time periods. Finally, Cochran-Mantel-Haenszel tests were employed to compare men and women on their respective “all sickness” and “mental disorder” days taken as sick leave from work. Frequency and percentage statistics were reported for each of the analyses in a cross-tabulation format. Statistical significance was assumed at an alpha value of 0.05 and all analyses were performed using SPSS Version 29 (Armonk, NY: IBM Corp.).