0633 Prospective Semester-Long Evaluation of College Student Sleep

Introduction Sleep duration and regularity are important for learning, development, and mental health. Recent work has revealed that both sleep duration and consistency of sleep timing are suboptimal in many college students. We characterized sleep duration and timing in college students over an entire semester. Methods We recruited students through online and in-person approaches, with most enrollment from in-person solicitations outside campus dining areas. Demographic information, sleep habits, external factors affecting sleep and chronotype were assessed via questionnaire. Throughout the semester, daily emails were sent to participants with a link to complete electronic sleep diaries. Incentives were offered for diary completion. Results 391 students (55% female) completed 7,390 daily sleep diaries. Most participants (65.7%) expected to graduate within the next one or two years. At baseline, most students (60%) reported sleeping less than they need to feel well-rested. The most common factors influencing sleep related to academic (82%) and social (67%) commitments. Noise was the most commonly reported environmental barrier, with 65% reporting that noise adversely affected their sleep. When class was in session, students averaged 7.2h±1.7h of sleep during the week and 7.7h±1.7h of sleep on weekends. Sleep was significantly increased during spring recess (mean 8.1h±2.0h). Sleep duration varied by chronotype (p