Frontiers in Psychology | |
Habitual Sleep, Social Jetlag, and Reaction Time in Youths With Delayed Sleep–Wake Phase Disorder. A Case–Control Study | |
article | |
Ingvild West Saxvig1  Ane Wilhelmsen-Langeland3  Ståle Pallesen1  Inger Hilde Nordhus6  Øystein Vedaa8  Bjørn Bjorvatn1  | |
[1] Norwegian Competence Center for Sleep Disorders, Haukeland University Hospital;Centre for Sleep Medicine, Haukeland University Hospital;Department of Global Public Health and Primary Care, University of Bergen;Bjørgvin District Psychiatric Centre, Haukeland University Hospital;Department of Psychosocial Science, University of Bergen;Department of Clinical Psychology, University of Bergen;Department of Behavioural Sciences in Medicine, University of Oslo;Department of Health Promotion, Norwegian Institute of Public Health;Department of Mental Health, Norwegian University of Science and Technology | |
关键词: DSWPD; delayed sleep–wake phase disorder; habitual sleep; social jetlag; reaction time; | |
DOI : 10.3389/fpsyg.2019.02569 | |
学科分类:社会科学、人文和艺术(综合) | |
来源: Frontiers | |
【 摘 要 】
The aim of this study was to explore habitual sleep, social jetlag, and day-to-day variations in sleep (measured as intra-individual standard deviation, ISD) in youths with delayed sleep–wake phase disorder (DSWPD), compared to healthy controls. We also aimed to investigate time of day effects in performance. The sample comprised 40 youths with DSWPD (70.0% female, mean age 20.7 ± 3.1 years) and 21 healthy controls (71.4% female, mean age 21.2 ± 2.2 years). Subjective and objective sleep were measured over 7 days on a habitual sleep schedule by sleep diary and actigraphy recordings. Performance was tested twice with a 12-h interval (22:00 in the evening and 10:00 the following morning) using a simple, 10-min sustained reaction time test (RTT). The results showed later sleep timing in the DSWPD group compared to the controls, but sleep duration, social jetlag, and ISD in sleep timing did not differ between the groups. Still, participants with DSWPD reported longer sleep onset latency (SOL) and poorer sleep efficiency (SE), sleep quality, and daytime functioning, as well as larger ISD in SOL, sleep duration, and SE. The groups had similar evening performances on the RTT, but the DSWPD group performed poorer (slower with more lapses) than the controls in the morning. The poor morning performance in the DSWPD group likely reflects the combined impact of sleep curtailment and circadian variations in performance (synchrony effect), and importantly illustrates the challenges individuals with DSWPD face when trying to adhere to early morning obligations.
【 授权许可】
CC BY
【 预 览 】
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