<em>Supporting data for “</em><strong>Sleep and Arousal of Survivors of Chronic Childhood Trauma</strong><em>”</em>

To investigate the complex relationships among sleep, arousal, and dissociation in childhood trauma survivors, three studies were conducted using samples of community-dwelling adults in Hong Kong. <br> Study 1 examined the differences in subjective sleep quality and sleep-related experiences among individuals exposed to short-term, chronic, and no childhood trauma, and evaluate if the chronicity of trauma altered the relationship between childhood trauma and sleep. Nine-hundred-and-fourteen adults completed an online survey on sleep, trauma-related symptoms, and psychological distress. <br> Study 2 extracted the data from Study 1 and examined the factor structure and psychometric properties of the Chinese version of the Dissociative Experiences Measure, Oxford (HKC-DEMO). <br> Study 3 examined the mediating role of arousal and the moderating role of dissociation in the relationship between childhood trauma and sleep. Fifty survivors of chronic childhood trauma and their age-and-gender-matched controls who reported no history of childhood trauma completed a week of sleep diary and an overnight portable polysomnography assessment. Heart rate variability and skin conductance level were also assessed at baseline and under distress to evaluate autonomic arousal.