Abstract
The objective of this study was to evaluate sleep quality and its relationship to cognitive factors among nurses. Sleep quality among nurses is an important issue, which requires more extensive study. Its correlation with cognitive ability has not been sufficiently considered. Five hundred forty nurses (66.3% female) working in 6 hospitals were selected as the sample of the study. Results show that nurses do not experience good quality of sleep. That is, 77.4% of the sample population of nurses have a poor quality of sleep, and nurses working the night shift have more sleep problems than other nurses. The results show that there is a relationship between dysfunctional beliefs and attitudes about sleep and metacognitive process and the quality of sleep, and that these variables can predict sleep quality. Based on the results of the study, it can be said that cognitive and metacognitive processes play an important role in sleep quality. Lack of sufficient sleep can create numerous problems for nurses and patients. Attention to the role of cognitive and metacognitive processes can help improve the sleep quality of nurses.