Morningness-eveningness and depressive symptoms: Test on the components level with CES-D in Polish students

摘要

Background: The study aimed to elucidate previously observed associations between morningnesseveningness and depressive symptomatology in university students. Relations between components of depressive symptomatology and morningness-eveningness were analysed. Methods: Nine hundred and seventy-four university students completed Polish versions of the Centre for Epidemiological Studies- Depression scale (CES-D; Polish translation appended to this paper) and the Composite Scale of Morningness. Principal component analysis (PCA) was used to test the structure of depressive symptoms. Pearson and partial correlations (with age and sex controlled), along with regression analyses with morning affect (MA) and circadian preference as predictors, were used.