Initiative Description: The intervention consisted of 3 groups: control, intervention 1, and intervention 2. Each study group was randomly assigned 2 schools. After baseline screening and randomization, the school starting time was delayed 30 minutes for intervention 1 and 60 minutes for intervention 2, while the control school kept to its usual schedule. 2 rounds of cross-sectional sleep surveys were administered just before year 1 of the trial and at the end of year 2 (completion). Daytime sleepiness was significantly associated with impaired attention, learning motivation, and academic achievement.
Study Results: The intervention significantly improved sleep duration and daytime sleepiness, which was significantly associated with attention, learning motivation, and academic achievement.
Reference: Li, S., Arguelles, L., Jiang, F., Chen, W., Jin, X., Yan, C., . . . Shen, X. (2013). Sleep, School Performance, and a School-Based Intervention among School-Aged Children: A Sleep Series Study in China. PLoS ONE,8(7). doi:10.1371/journal.pone.0067928
Level of Evidence: Excellent