Do later school start times improve adolescents' sleep and substance use? A quasi-experimental study.

ABSTRACT:

Objective

A later school start time policy has been recommended as a solution to adolescents' sleep deprivation. We estimated the impacts of later school start times on adolescents' sleep and substance use by leveraging a quasi-experiment in which school start time was delayed in some regions in South Korea.

Methods

A later school start time policy was implemented in 2014 and 2015, which delayed school start times by approximately 30-90 minutes. We applied difference-in-differences and event-study designs to longitudinal data on a nationally representative cohort of adolescents from 2010 to 2015, which annually tracked sleep and substance use of 1133 adolescents from grade 7 through grade 12.

Results

The adoption of a later school start time policy was initially assoc

SUBMITTER: Jung J 

PROVIDER: S-EPMC11269004 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature