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Effects of a 20 minutes delay in school start time on bed and wake up times, daytime tiredness, behavioral persistence, and positive attitude towards life in adolescents
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Das-Friebel, Ahuti, Gkiouleka, Anna, Grob, Alexander and Lemola, Sakari (2020) Effects of a 20 minutes delay in school start time on bed and wake up times, daytime tiredness, behavioral persistence, and positive attitude towards life in adolescents. Sleep Medicine, 66 . pp. 103-109. doi:10.1016/j.sleep.2019.07.025 ISSN 1389-9457.
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Official URL: https://doi.org/10.1016/j.sleep.2019.07.025
Abstract
Objectives
Preliminary evidence suggests that delaying school start times is an effective tool for improving adolescent sleep duration. Our study assessed whether a policy driven 20-minute delay in school start times led to an increase in adolescents’ weekday bed and wake up times.
Method
Data collected via school satisfaction surveys concerned 663 students (45.2% females, Mean age: 14.91 years, SD = .58 years) in three lower-track secondary schools in Switzerland. Of all the students, 249 experienced a policy-driven 20-minutes school start time change (SSTc), from 7.40 am to 8.00 am between the 8th and 9th grade, while 414 students did not (Comparison Group/CG). Students filled out the survey twice, at the end of their 8th and 9th grades, respectively, and reported their weekday bed and wake up times, daytime tiredness, behavioural persistence, and positive attitude towards life.
Results
Generalized estimating equations models of bed and wake up times showed that there was a significant delay in both the bed and wake up times of the students in the SSTc group. Multilevel analyses revealed that students in the SSTc group did not significantly differ from CG students in daytime tiredness, behavioural persistence, and positive attitude towards life.
Conclusions
Findings suggest that not only wake up times but also bed times may shift later when school start times are delayed. The 20 minutes delay in school start times may have been too slight to have an impact on daytime tiredness, behavioral persistence and positive attitude towards life.
Item Type: | Journal Article | ||||||||
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Subjects: | B Philosophy. Psychology. Religion > BF Psychology L Education > LB Theory and practice of education R Medicine > RJ Pediatrics |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Psychology | ||||||||
Library of Congress Subject Headings (LCSH): | Sleep disorders in adolescence , Adolescent psychology , Health behavior in adolescence, Teenagers -- Mental health , School children -- Mental health | ||||||||
Journal or Publication Title: | Sleep Medicine | ||||||||
Publisher: | Elsevier BV | ||||||||
ISSN: | 1389-9457 | ||||||||
Official Date: | February 2020 | ||||||||
Dates: |
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Volume: | 66 | ||||||||
Page Range: | pp. 103-109 | ||||||||
DOI: | 10.1016/j.sleep.2019.07.025 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
Date of first compliant deposit: | 6 August 2019 | ||||||||
Date of first compliant Open Access: | 7 August 2020 | ||||||||
RIOXX Funder/Project Grant: |
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