0691 Quality of life and subjective sleep characteristics among a middle-aged population in Korea

Abstract

Abstract Introduction Sleeping problems are associated with physical and mental conditions as well as quality of life (QoL). This study aimed to evaluate the association between sleep characteristics and QoL in a middle-aged population. Methods This cross-sectional study included 4051 adults (1751 males and 2300 females) aged 30-50 who were selected through a multi-stage stratified sampling based on sex, age, and region between 2017 and 2019. Sociodemographic, sleep characteristics, and QoL were evaluated and compared. Sleep characteristics were determined using the Pittsburgh Sleep Quality Index, and were defined as sleep duration (SD), sleep quality (SQ), sleep efficiency (SE), and sleep latency (SL). QoL was evaluated using the SF-12, which calculated physical and mental QoL. Degrees of insomnia symptoms were classified into 0-3 by summing up the number of cases of sleep duration (≤6.5 hours), sleep efficiency (< 85%), and sleep latency (> 30 min). We used linear regression models to estimate the relationship between sleep characteristics and degrees of insomnia symptoms with QoL, adjusting for sociodemographic covariates. Results Sleep characteristics of the participants include average sleep duration 6.8 hours (≤6 h short, 45%; ≥9 h long, 3%), sleep quality 4.6 points (poor SQ, 29%), sleep efficiency 94.5% (< 85% SE, 11%), and sleep latency 19.7 minutes (>30 min SL, 9%). About 26% had one insomnia symptom and 11% had two or more insomnia symptoms. All sleep characteristics showed significant associations with physical and mental QoL. Particularly, physical QoL was associated with long SD (coefficients [B]: -1.56, 95% confidence interval [CI]: -2.77, -0.35), low SE (B: -2.32, 95% CI: -2.94, -1.7), and long SL (B: -3.3, 95% CI: -3.97, -2.6), and mental QOL was associated with low SE (B: -3.3, 95% CI: -4.0, -2.5) and long SL (B: -5.1, 95% CI: -5.8, -2.5). Physical and mental QoL was significantly linearly decreased with number of insomnia symptoms (for physical QoL, B: -0.87, -2.87, and -4.24; for mental QoL, B: -1.1, -4.01, and -5.9, by number of insomnia symptoms 1, 2, and 3, respectively). Conclusion Poor sleep characteristics were negatively associated with QoL in Korean middle-aged adults. Support (if any) This was funded by the Korea Institution of Oriental Medicine, KSN2023120.