Fig. 2: Subjective sleepiness during the sleep loss night.

Values are shown as estimated marginal means [95%-CI] as derived from generalized linear mixed models. Baseline (i.e., at 23:00) Karolinska Sleepiness Scale (KSS) scores (mean ± SD): men, 4.8 ± 1.9; women: 5.7 ± 1.5; with normal weight: 5.1 ± 1.6; and with obesity: 5.4 ± 1.9. P < 0.05 was considered significant.