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Effects of Delayed School Start Times on Sleep, Mental Health, and Academic Performance Among Norwegian Adolescents

NCT06657482 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 583

Last updated 2026-05-01

No results posted yet for this study

Summary

The aim is to investigate whether later school start times have positive effects on high school students' sleep patterns, mental health and daytime functioning.

Conditions

  • Sleep
  • Sleep Disorders, Circadian Rhythm
  • Psychiatric Disorder
  • Sleepiness, Daytime

Interventions

BEHAVIORAL

Delayed school start time

The intervention group will start school two hours later on Mondays (at 10.15 ± 15 min) and one hour later on Tuesdays (9.15 ± 15 min) and to ordinary school start time (8.15 ± 15 min) for the rest of the week

Sponsors & Collaborators

  • Haukeland University Hospital

    collaborator OTHER

  • University of Bergen

    lead OTHER

Principal Investigators

  • Bjørn Bjorvatn · Department of Global Public Health and Primary Care, University of Bergen, Norway

Study Design

Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
NONE
Model
PARALLEL

Eligibility

Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2023-08-15
Primary Completion
2025-06-30
Completion
2025-06-30

Countries

  • Norway

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT06657482 on ClinicalTrials.gov