Multiple regression analysis indicated that a lower education level (PR=1.78; 95% CI: 1.36 - 2.34 for illiteracy / literacy), marital status (PR=1.56; 95% CI: 1.19 - 2.05 for divorce / separated), and having a chronic disease (PR=1.56; 95% CI: 1.36 - 2.34) were significantly associated with poor sleep quality.