Descriptive Statistics for Strategy Types.

Notes: Numbers are means ± SEM. Strategy Type significantly predicted self-reported chronotype, such that Incomplete Switchers had the latest chronotypes, while the Sleep Switchers and No Sleep nurses had significantly earlier chronotypes compared to the Incomplete Switchers (Kruskal-Wallis, χ2(4)  = 20.9, p<0.01, Tamhane's post hoc comparisons, p<0.01). Strategy Type significantly predicted age with older and more experienced nurses more likely to choose the No Sleep strategy or Night Stay strategies (ANOVA, F(4,286)  = 4.5, p<0.01; Tukey's HSD, p<0.05). There was a significant effect of Strategy Type on Years of Experience (ANOVA, F(4,226)  = 2.4, p<0.05), such that experienced nurses were more likely to choose the No Sleep strategy than the Nap Proxy, No Sleep, or Incomplete Switcher strategies (p<0.05). Nurses with children at home were less likely to be an Incomplete switcher and more likely to choose the No Sleep strategy (G(4)  = 21.0, p<0.05). Nearly a third (29%) of nurses with children in the home chose No Sleep compared to one-fifth of the nurses without children in the home. Only 4% of nurses with children in the home were Incomplete Switchers compared to 18.2% of nurses without children in the home.