Cochrane · systematic review · CD009467
Later school start times for supporting the education, health, and well‐being of high school students
Marx, R, Tanner‐Smith, EE, Davison, CM, et al. · Cochrane Database of Systematic Reviews · 2017 · Cochrane Library
Public HealthAMSTAR 2: not assessed
SoF tableOnly the outcomes this review put in its Summary of Findings table are listed (the Cochrane Handbook caps them at about seven per comparison). Its other analyses are not shown here.
Questions
6
current version
GRADE rated
6
No studies
0
Included studies
NR
No studies 0 · 0%Ungraded 0 · 0%Very low 6 · 100%Low 0 · 0%Moderate 0 · 0%High 0 · 0%
Ungraded means an effect was reported without a GRADE rating; it is not a gap. No studies means the review found nothing to answer the question. The six categories are a display order, not a score.
Questions and results
Early versus delayed school starts
Population: students aged 13‐19
| Outcome | Effect | Evidence | Status / GRADE |
|---|---|---|---|
Student academic outcomes Early vs delayed school starts | no estimate extracted | 4 studies · 254743 participants | Very low Downgraded: risk of bias, inconsistency |
Amount or quality of sleep Early vs delayed school starts | no estimate extracted | 8 studies · 52340 participants | Very low Downgraded: risk of bias, inconsistency |
Mental health outcomes Early vs delayed school starts | no estimate extracted | 1 study · 1200 participants | Very low Downgraded: risk of bias, inconsistency |
Truancy or attendance outcomes Early vs delayed school starts | no estimate extracted | 4 studies · 255122 participants | Very low Downgraded: risk of bias, inconsistency |
Alertness Early vs delayed school starts | no estimate extracted | 4 studies · 2735 participants | Very low Downgraded: risk of bias, inconsistency |
Adverse events/unintended consequences Early vs delayed school starts | no estimate extracted | 4 studies · 207576 participants | Very low Downgraded: risk of bias, inconsistency |