Association Between Myopia and Sleep Duration Among Primary School Students in Minority Regions of Southwest China: a School-based Cross-sectional Research

Overview

Journal BMJ Open

Specialty General Medicine

Date 2024 Nov 2

PMID 39488419

Authors

Ying Huang

Zhengyan Ge

Litao Chang

Qiang Zhang

Jie Xiao

Peiqian Li

Zixue Ma

Xixi Li

Xiao Luo

Dafeng Huang

Jinjiao Zhang

Affiliations

Soon will be listed here.

Abstract

Objective: To investigate the relationship between sleep duration and myopia among primary school students in minority regions of Southwest China.

Methods: The school-based, cross-sectional study was conducted from October 2020 to January 2021. All participants underwent a comprehensive ocular examination and completed a questionnaire on demographic characteristics, ophthalmological history and major environmental factors for myopia. Spherical equivalent (SE) and ocular biometric parameters were measured after cycloplegia, with myopia being defined as SE ≤-0.5 D (Diopter). Multivariate regression models were used to examine the association of sleep duration with myopia, SE and axial length (AL).

Results: A total of 857 students from grades 2 to 4 were included in the analysis, of which 63.6% were myopic and 62.0% belonged to ethnic minorities. Boys had a slightly higher prevalence of myopia compared with girls (66.7% vs 60.6%, p=0.06). Myopic students had longer AL, deeper anterior chamber depth and thinner central corneal thickness compared with non-myopic students (all p<0.05). There was no significant association between sleep duration and myopia in both boys and girls (p=0.319 and 0.186, respectively). Moreover, girls with a sleep duration of 8-9 hour/day had higher SE and shorter AL compared with those with less than 8 hour/day of sleep (β=0.41 and -0.32, respectively, all p<0.05).

Conclusion: This cross-sectional study did not find a significant association between sleep duration and myopia. However, it suggests that 8-9 hours of sleep per day may have a protective effect on SE progression and AL elongation in girls. Future studies with objectively measured sleep duration are needed to validate the findings.

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