Impacts of human behaviors involving sound and light exposure in sleep environments on sleep and mental disorders: A cross-sectional study

Creating an optimal sleeping environment is essential. Few studies have examined how common individual behaviors alter the daily sleep environment and the subsequent health impacts of these changes among the general population. This study presented a cross-sectional analysis of 13,157 Chinese college students, utilizing binomial logistic regression models and mediation effect analysis to elucidate the associations between human behaviors involving sound and light exposure in sleep environments and outcomes related to sleep disorders, depression, and anxiety. Our results indicated that noise exposure, listening to white noise and content-based audio (audiobooks, crosstalk, and radio) before sleep, watching electronic screens in a dim environment, using noise-canceling tools during sleep, adjusting room light to be on during sleep, and using light-blocking tools during sleep was associated with an increased risk of sleep disorders by 54.9-343.4 %. The risk of mental disorders increased by 0.325-4.379 times. Pathetic (odds ratio (OR) = 1.568) and stirring music (OR = 1.279) were associated with a higher risk of sleep disorders, while gentle music was correlated with a lower risk (OR = 0.842). Additionally, warm light and gentle/cheerful music were associated with lower depression and anxiety risks (OR = 0.635-0.733). Sleep quality was found to partially mediate the relationship between these human behaviors and mental disorders, and mental disorders also mediated the relationship between these behaviors and sleep disorders. The research findings offer a scientific foundation for optimizing sleeping environments through behavior control.