ARTICLE Impact of Delaying School Start Time on Adolescent Sleep, Mood, and Behavior Judith A. Owens, MD, MPH; Katherine Belon, BA; Patricia Moss, PhD Objective: To examine the impact of a 30-minute delay bedtime advanced by 18 minutes (95% confidence in school start time on adolescents’ sleep, mood, and interval, 7-29 minutes [t = 3.36; P .001]); the per- behavior. centage of students getting less than 7 hours of sleep decreased by 79.4%, and those reporting at least 8 Design: Participants completed the online retrospec- hours of sleep increased from 16.4% to 54.7%. Students tive Sleep Habits Survey before and after a change in school reported significantly more satisfaction with sleep and start time. experienced improved motivation. Daytime sleepiness, fatigue, and depressed mood were all reduced. Most Setting: An independent high school in Rhode Island. health-related variables, including Health Center visits for fatigue-related complaints, and class attendance also Participants: Students (n = 201) in grades 9 through 12. improved. Intervention: Institution of a delay in school start time Conclusions: A modest delay in school start time was from 8 to 8:30 AM. associated with significant improvements in measures of adolescent alertness, mood, and health. The results of this Main
JAMA Pediatrics – American Medical Association
Published: Jul 1, 2010
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