Fig. 2

Variation of SAD prevalence, GSS, and symptom dimensions as the SPAQ is completed across different months and seasons. a SAD prevalence in different months. b Monthly variations in feeling worse as the SPAQ is completed across different seasons. c Monthly variations if fatigue as the SPAQ is completed across different seasons. d Monthly variations in energy levels as the SPAQ is completed across different seasons. Note: The monthly prevalence of SAD and the selected mood symptoms (feeling worse, fatigue, and energy) across the year based on responses of the seasonal pattern assessment questionnaire in every season