The Association Between Sleep Duration and Quality of life: A Cross-Sectional Study in a Large Sample of Isfahan Steal Company's Employees

Investigating the quality of life and its determinants provides a general prospective about the health status and contributes in health planning. The present study aimed at investigating the relationship between sleep duration and quality of life, adjusting for the impacts of important confounders, in Isfahan steal company's employees. In a cross-sectional study in 2016, 3063 people of Isfahan steal company's employees were selected through multistage cluster sampling and investigated. Required Information were obtained by EQ-5D questionnaire for evaluating quality of life, IPAQ Questionnaire for evaluating physical activity examination, job stress Questionnaire for evaluating job stress and demographic characteristics of study participants. Latent class regression with Mplus7 software was used for data analysis. mean (SD) age (year) and sleep duration (hour) of participants were 36.74 (7.31) and 7.11 (1.17) respectively, and 91.5% were male. in terms of quality of life, results of fitting LCR with 2 classes indicated that 79.7% and remaining were being in high and low quality of life classes, respectively. A direct significant association was found between sleep duration and quality of life. In crude model, odds ratio (OR): 1.2 (95% CI for OR: 1.12 - 1.3). after adjusting for potential confounding variables the observed association was remained statistically significant, OR: 1.2 (95% CI for OR: 1.1 – 1.3), indicating an hour increase in sleep duration, increase 20% odds of beings in high quality of life class. through improving the lifestyle, quality of life and life satisfaction would be increase; so identifying the impact of factors related to quality of life in such specific community leads to focusing the interventions and health advices on the mentioned factors, resulting the modifying of stressful situations and improving quality of life and finely increasing the efficiency