ArticleSleep2025
Circadian phase in high-school students: weekday-weekend shifts and relationships to other sleep/circadian characteristics.
Article in Sleep, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Circadian Timing Moderates Diurnal Positive Affect Rhythms in Adolescents.Journal of biological rhythms · 2026Article
- Adolescent circadian sleep health: a review of multimodal assessment strategies and clinical implications.Frontiers in sleep · 2026Review
- Using a wearable EEG device to examine age trends in sleep macro- and micro-architecture across adolescence.bioRxiv : the preprint server for biology · 2025Article
- Preliminary evaluation of dim light melatonin onset as an indicator of nighttime eating in adolescents.Eating behaviors · 2025Article
- Can the Sun Prevent Weekend Sleep Advance After Early Weekday Wakeups?Nature and science of sleep · 2025Article
- Weekday-Weekend Shifts of Light/Dark Regimen Extend Sleep and Lifespan ofNature and science of sleep · 2025Article
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Authors and funding
6 authors.
Funding
Abstract
STUDY
objectivesIn a sample of high-school students, (1) to characterize within-person changes in sleep and circadian characteristics from school nights to weekend nights, (2) to examine whether later circadian phase relates to weekday-weekend changes in sleep/circadian characteristics, and (3) to examine correlations between biological and proxy measures of circadian phase.
methodsSample included 95 high-school students reporting at least one drink of alcohol in their lifetime. Participants completed baseline self-report measures, wrist actigraphy for 8 days, and two overnight laboratory visits (Thursday and Sunday) for salivary melatonin sample collection. Circadian phase was calculated as the dim light melatonin onset (DLMO; 4 pg/mL threshold). Proxy circadian phase measures included the Composite Scale of Morningness (CSM), Munich Chronotype Questionnaire (MCTQ), and actigraphy-based midsleep.
resultsOther than nap duration, all examined actigraphy-based sleep characteristics, DLMO, and DLMO-sleep phase angles showed weekday-weekend differences (adjusted p-value < .05). Later mean DLMO was associated with larger weekday-weekend changes in total sleep time (b = 0.39, padjusted = .010). CSM and actigraphy-based midsleep showed small-to-moderate (rho = ~0.3) and moderate (rho = ~0.5) correlations with DLMO, respectively, but chronotype based on the MCTQ was not correlated with DLMO.
conclusionsIn the largest published sample to date, circadian phase substantially shifted from the school week to weekend, underscoring the "social jetlag" imposed by early school start times. Similarly, teens with the latest circadian phase exhibited the greatest weekend catch-up sleep. Finally, perhaps due to the instability of circadian phase in this context, self-reported proxies for circadian timing were poor approximations of biological circadian phase.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.