Effects of school start time on students’ sleep duration, daytime sleepiness, and attendance: a meta-analysis
Lower secondary (grades 7–9) Upper secondary Sleep and the body
Links to claims
Supports (1)
| Claim | Basis |
|---|---|
| C14 | Meta-analysis of 20 studies (5 longitudinal, 15 cross-sectional): later school start times went with longer sleep, less daytime sleepiness (7 studies) and less tardiness (3 studies); authors urge caution. Sleep side of C14 only; no academic outcomes. Abstract only. |
Review state: first-pass draft, pending human review.
Source note
Syntes: Bowers & Moyer (2017) — the standard meta-analysis behind "later starts mean more sleep"
Källa: Bowers, J. & Moyer, A. (2017). Effects of school start time on students’ sleep duration, daytime sleepiness, and attendance: a meta-analysis. Sleep Health 3(6), 423–431. https://doi.org/10.1016/j.sleh.2017.08.004
Verified content
- [abstract] 20 studies (5 longitudinal, 15 cross-sectional comparison-group): later school start times were associated with longer sleep duration.
- [abstract] Later starts were also associated with less daytime sleepiness (7 studies) and less tardiness (3 studies).
- [abstract] The authors call for cautious interpretation because of methodological limits, including the need for more longitudinal primary research.
Limits
- [assessment] Sleep, sleepiness and attendance only; no grades or test scores, so it bears on the sleep half of C14, not on results. Pooled sizes are not stated in the abstract.
Why it is in the library
The library had this meta-analysis only as a citation inside another paper; C14's first clause (later starts let teenagers sleep longer) rests on it.
Added 2026-10-25 by the project (weekly source sweep, kind: old; read: abstract). [abstract] = from the published abstract; [full text] = read in the full text; [assessment] = the project's own assessment.
Metadata as recorded
- ID
- SLEEP-016
- Tier
- meta
- Titel
- Effects of school start time on students’ sleep duration, daytime sleepiness, and attendance: a meta-analysis
- Författare
- Bowers, J. & Moyer, A.
- År
- 2017 (Sleep Health 3(6), 423–431)
- Källa/DOI
- https://doi.org/10.1016/j.sleh.2017.08.004
- URL
- https://doi.org/10.1016/j.sleh.2017.08.004 (subscription)
- Typ
- meta-analysis of 5 longitudinal and 15 cross-sectional comparison-group studies of school start time and sleep
- Åldersgrupp
- grundskola-hog;gymnasium
- Teman
- somn-och-kropp
- Hämtad
- 2026-10-25
- Paywall
- paywalled
- Tillagd
- source sweep 2026-10-25 (kind: old); links pending human review
The original files (PDF or abstract) are kept in the project archive and are not published here.