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자료유형
학술저널
저자정보
김하연 (가톨릭대학교) 김태원 (가톨릭대학교 성빈센트병원) 김성민 (가톨릭대학교) 엄유현 (가톨릭대학교) Ho-Jun Seo (Catholic University) 정종현 (가톨릭대학교) 홍승철 (가톨릭대학교) Ji Hye Oh (St. Vincent’s Hospital)
저널정보
대한수면학회 sleep medicine research sleep medicine research Vol.10 No.1
발행연도
2019.1
수록면
1 - 7 (7page)

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Background and ObjectiveaaThe purpose of this study was to investigate the effect of delaying school start time on sleep quality, emotions, and performance in Korean adolescents. MethodsaaData were collected in two months and 12 months after delaying school time, each us- ing self-administered questionnaires for 238 students at a middle school in Gyeonggi province. Questionnaires consisted of demographic data and various sleep and emotion related scales, in- cluding the Pittsburgh Sleep Quality Index (PSQI). Students were divided into two groups, of in- creased or decreased total sleep time (TST). ResultsaaIn both groups, sleep duration, global PSQI score, and sleep efficiency significantly im- proved in 12 months, compared to two months’ data. There was significant improvement in de- pression, stress, behavioral aggression, and verbal aggression in the increased TST group. The in- creased TST group showed advancement in subjective feeling of happiness, and number of times students are late for school, between baseline and 12 months. The decreased TST group showed significant differences between baseline and 12 months in seven categories of subjective life quality/ emotions in school, including subjective feeling of happiness, concentrating in classes, and anger. ConclusionsaaAfter school start time was delayed, many adolescent’s TST relatively decreased on school nights. However, students whose TST increased, showed reduction in depression, stress, and behavioral/verbal aggression. Students whose TST decreased also reported reduced negative affect, and significant improvement in subjective emotions and school performance. Delaying school start time may be beneficial, in improving mental health and quality of life of students.

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