Background: We examined the association between depressed mood (DM) and sleep duration in a multi-ethnic population Amsterdam, extent to which DM accounts for both short long sleep. Methods: Cross-sectional data using 21,072 participants (aged 18–71 years) from HELIUS study were analyzed. Sleep was classified as: short, healthy, (<7, 7–8, ≥9 h/night). A Patient Health Questionnaire (PHQ-9 su...