Sleep onset time as a mediator in the association between screen exposure and aging: a cross-sectional study

医学 视网膜 横断面研究 调解 眼底(子宫) 屏幕时间 人口统计学的 听力学 眼科 人口学 内科学 政治学 病理 社会学 法学 肥胖
作者
Senlin Lin,Meng Gao,Juzhao Zhang,Yuting Wu,Tao Yu,Yajun Peng,Yingnan Jia,Haidong Zou,Lina Lu,Deshang Li,Yingyan Ma
出处
期刊:GeroScience [Springer International Publishing]
标识
DOI:10.1007/s11357-024-01321-x
摘要

Abstract Excessive screen exposure has become a significant health concern. This study investigates the impact of screen time on aging in middle-aged and elderly populations. Healthy working adults over 45 years old in Shanghai, China, underwent general and ocular examinations. Questionnaires collected demographics, medical history, and screen exposure details. Aging was assessed using the retinal age gap, defined as the difference between the retinal age predicted by deep learning algorithms based on fundus images and chronological age. Pathway analysis tested the mediation effect of sleep duration and onset time on the relationship between screen usage and retinal age gap. The retinal age gap increased with longer screen exposure, from 0.49 ± 3.51 years in the lowest tertile to 5.13 ± 4.96 years in the highest tertile (Jonckheere-Terpstra test, p < 0.001). Each additional hour of screen exposure accelerated the retinal age gap by 0.087 years (95% CI, 0.027, 0.148, p = 0.005) in the fully adjusted linear model. Sleep onset time mediated the impact of screen usage on the retinal age gap (indirect effect, β = 0.11; 95% CI 0.04–0.24). The impact of screen usage in a light-off environment on the retinal age gap was fully mediated by sleep onset time (indirect effect, β = 0.22; 95% CI 0.07–0.38), with the proportion being 100%. Our study identified a correlation between excessive screen time and a wider retinal age gap in middle-aged and elderly individuals, likely due to delayed sleep onset. To mitigate the adverse effects on the retina and aging, it is important to limit screen usage and avoid screens before bedtime.
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