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Chan, Christian S.; Poon, Cyanea Y.S.; Leung, Jacklyn C.Y.; Lau, Kristy N.T.; Lau, Esther Y.Y.
Journal of adolescence (London, England.), July 2018, 2018-07-00, 20180701, Letnik: 66, Številka: 1Journal Article
The effects of a delayed school start time by one hour were examined at a boarding school in Hong Kong. Two cohorts of high school students (N = 228; 61.8% female) were recruited respectively before and after a school start time changed from 7:30am to 8:30am. Both cross-cohort and within-cohort longitudinal comparisons yielded significant increase in total sleep time. Cross-cohort comparison yielded improvement in sleep quality, insomnia, life satisfaction, and psychological distress. Longitudinal data suggested that the longer the additional sleep time, the better was sleep quality, day-time functioning, and subjective wellbeing.
