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Figure 3. Influence of work overload on cortisol measures after awakening, for 3 work overload groups: Low (N = 64), average (N = 83), and high (N = 72) work overload scores. (a) Mean cortisol levels in the first hour after awakening on weekend days compared with weekdays. (b) Time course of cortisol levels in the first hour after awakening on weekend vs. weekdays. Both graphs illustrate significant effects controlled for sex, time of awakening, and sleep duration (see text for details).
