Mood rhythmicity is associated with depressive symptoms and caffeinated drinks consumption in South American young adults

ABSTRACTAmong the factors that contribute to the onset and maintenance of depressive disorders, rhythmicity of symptoms and consumption of caffeinehave recently gained attention. The current study aimed to examine the differential rhythmicity of relevant variables in a sample of young participants, considering the presence of depressive symptomatology and the frequency of caffeinateddrinks consumption. A significant 24-hour differential rhythmicity of mood, cognitive and physiological variables was found indicating an evening peak pattern in the participants with depressive symptoms. Interestingly, caffeinateddrinks consumption was differentially associatedwith self-perceived peaks, according to the presence of depressive symptomatology. Our findings are among the first reports about the potential association of the 24-hours rhythmicity of relevant mood-related variables, depressive symptoms, and caffeineintake. These results support the view that the identification of risk factors for depression, an...