Sleep duration and adolescent vision outcomes: evidence from rural China.

ABSTRACT:

Objective

To examine the association between weekday sleep duration and visual health among adolescents in low-resource rural settings, and to explore potential behavioral mechanisms.

Methods

We used cross-sectional data from 36,139 rural primary and junior high school students in northwestern China (2012, 2019). Visual acuity was assessed via standardized LogMAR tests. To address potential endogeneity in self-reported sleep, we applied two-stage least squares regression with sunset time as an instrumental variable.

Results

Students averaged 8.65 weekday sleep hours, and 58.3 % slept fewer than 9 h-below age-specific recommendations. Instrumental variable estimates indicated that each additional weekday sleep hour reduced the LogMAR score by 0.070 (p < 0.05), i

SUBMITTER: Guan H 

PROVIDER: S-EPMC12423698 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature