No evidence of seasonal variation in mild forms of depression

ConclusionsMild depression is not related to seasonal changes or proxy measures of light exposure. The findings cast doubt on light deficiency as a causal factor of depressive disorders, which underpins the inclusion of the seasonal pattern modifier in DSM-5 and light supplementation as a treatment modality.

Source: Journal of Behavior Therapy and Experimental Psychiatry - September 16, 2018 Category: Psychiatry Source Type: research