PURPOSE
The purpose of this study was to identify factors affecting sleep quality in nurses working in a tertiary hospital in Korea.
METHODS
The sample of two hundred and sixty three nurses was drawn from one tertiary care hospital in Korea. Using a descriptive study design, clinical nurses completed the standardized questionnaires, including sleep quality, depressive symptoms, and resilience. Descriptive statistics were computed to describe the sample and study variables. Logistic regression analyses were used to identify factors affecting sleep quality which was classified into two categories.
RESULTS
A total of 263 registered nurses participated in this study. Most of the participants were female (n=252, 95.8%) and single (n=148, 75.9%), with a mean age of 30.09±7.51 years. The average score of sleep quality was 8.57±3.24. Using a cut-off point of 5.0, 84.0% (n=221) were poor sleepers. After controlling for demographic and job-related variables, the depressive symptoms and resilience were associated with poor sleep quality among clinical nurses (Odds Ratio [OR]=4.56, 95% Confidence Interval [CI]=1.02~20.49; OR=0.97, 95% CI=0.94~0.99, respectively). This model explained 19.5% of the variance in sleep quality.
CONCLUSION
The two factors reported to impact the quality of sleep were increased depressive symptoms and lower resilience levels. In order to improve nurses' sleep quality, researchers and nursing administrators need to develop and provide some strategies for decreasing depressive symptoms and enhancing their resilience.

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