Clinical trial NCT06657482: Effects of Delayed School Start Times on Sleep, Mental Health, and Academic Performance Among Norwegian Adolescents
Official title: Effects of Delayed School Start Times on Sleep, Mental Health, and Academic Performance Among Norwegian Adolescents
Study type: INTERVENTIONAL
Overall status: RECRUITING
Phase: NA
Conditions: Sleep
Sleep Disorders, Circadian Rhythm
Psychiatric Disorder
Sleepiness, Daytime
Lead sponsor: University of Bergen
Sponsor class: OTHER
Collaborators: name: Haukeland University Hospital
First posted: 2024-10-24
Enrollment: 200
Sex: ALL
Standard ages: CHILD
ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: PREVENTION

Brief 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.

Detailed description: The current study is a randomized controlled study investigating whether later school start times on Mondays and Tuesdays have positive impact on high school students' sleep patterns, mental health, and daytime functioning. 1st year high school students are randomly assigned to classes starting either two hours later on Mondays and one hour later on Tuesday and ordinary school start times (8:15 ± 15 min) for the rest of the week, or to classes starting at regularly school start times (8:15 ± 15 min.) all weekdays. The students will be invited to respond to a web-based survey assessing sleep, mental health, and daytime functioning by the beginning and end of the school year. Official school grades and school absence data will be collected through the county administration for consenting students. Cognitive tests and objective sleep record through Somnofy are planned for a subgroup by the end of the 2024-25 school year. The study will last for two school years and involve two different cohorts of 1st year high school students.

Eligibility criteria: Inclusion Criteria:

* 1st year high school students at study preparatory program of participating schools

Exclusion Criteria:

* Parent consent not obtained/documented for participants under 16 years

Primary outcomes:
measure: Average sleep duration on school days
timeFrame: Baseline and at the end of the school year (at about 8 months follow-up)
measure: Preferred school start time (late vs. early Mondays and Tuesdays)
timeFrame: At the end of the school year (at about 8 months follow-up)
measure: Daytime sleepiness on school days
timeFrame: CADSS: Baseline and at the end of the school year (at about 8 months follow-up). KSS: At the end of the school year (at about 8 months follow-up)-up
Secondary outcomes:
measure: School absence and academic performance (self-reported and objective)
timeFrame: Self-reported data: Baseline and end of school year. Objective data: At the end of the school year (at about 8 months follow-up)-up
measure: Mental health
timeFrame: Baseline and at the end of the school year (at about 8 months follow-up)
measure: Social jetlag
timeFrame: Baseline and at the end of the school year (at about 8 months follow-up)
measure: Sleep duration, school days with early vs. late start
timeFrame: At the end of the school year (at about 8 months follow-up)
Other outcomes:
Locations:
city: Bergen
country: Norway
facility: University of Bergen
state: Vestland
Study officials:
affiliation: Department of Global Public Health and Primary Care, University of Bergen, Norway
name: Bjørn Bjorvatn
role: PRINCIPAL_INVESTIGATOR
References: