Fig. 1From: Sleep patterns among shift-working flight controllers of the International Space Station: an observational study on the JAXA Flight Control TeamComparison of insomnia symptoms and excessive sleepiness among the JFCT members. The percentages of responses are shown for each group. Boxes written by a broken line present a significant group effect detected by the Kruskal-Wallis test. *Significantly different by post hoc comparisonsBack to article page