Sleeplessness.

This article identifies and reviews research related to sleeplessness reported by nurses in the literature. The current state of clinical nursing research as it relates to sleep is evaluated, including the content, methodology, and implications for further research. Although the review indicates current interest in sleep by clinical nurse researchers, the number of nursing studies in the literature is limited, especially within specific areas, such as age groups and setting. Also, directions for future nursing research on sleep are recommended.