Survey
The survey elicited information about the nurses' daily activities, such as time spent commuting or attending to family responsibilities, work shifts, work breaks, and mood. In addition, nurses were expected to complete daily logs that elicited information about how many hours they worked at the hospital and what kind of work was done, how physically and mentally tired they were, how stressed they were, how they slept, and when they slept. Participants were also asked, "On a typical day, how many minutes does it take you to go from your home to the hospital where you work?" to assess the impact of commuting time on sleep.