0771 Explaining Self-reported Hypersomnolence In Seasonal Depression

Introduction Hypersomnolence is commonly reported in Major Depressive Disorder with Seasonal Pattern (Seasonal Affective Disorder; SAD). However, self-reported hypersomnolence may conflate long sleep duration, daytime sleepiness, fatigue, increased time in bed, or maladaptive sleep cognitions, undermining treatment efforts. Methods Eighty-eight participants ages 18-65 years old were recruited during the winter (SAD = 43, Control = 45)....