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. Author manuscript; available in PMC: 2010 Aug 1.

Published in final edited form as: Psychoneuroendocrinology. 2009 Mar 5;34(7):1029–1040. doi: 10.1016/j.psyneuen.2009.02.002

Mean basal plasma cortisol levels (μg/dl) over all three time points (0600h, 1200h, 1800h) and mean sleep efficiencies (%) during the sleep interval for MR and NR animals. (a) MR, black circles, r² = 0.831, p<0.01; (b) NR, open circles, r² = 0.506, p<0.05. Insets are 0600h, 1200h, and 1800h plasma cortisol levels vs. mean sleep efficienies (%). (MR 0600h:, r² =0.531, p=0.063, 1200h: r² =0.898, p<0.001, 1800h: r² =0.287, ns; NR 0600h: r² =0.180, ns, 1200h: r² =0.226, ns, 1800h: r² =0.343, ns)

Mean basal plasma cortisol levels (μg/dl) over all three time points (0600h, 1200h, 1800h) and mean sleep efficiencies (%) during the sleep interval for MR and NR animals. (a) MR, black circles, r² = 0.831, p<0.01; (b) NR, open circles, r² = 0.506, p<0.05. Insets are 0600h, 1200h, and 1800h plasma cortisol levels vs. mean sleep efficienies (%). (MR 0600h:, r² =0.531, p=0.063, 1200h: r² =0.898, p<0.001, 1800h: r² =0.287, ns; NR 0600h: r² =0.180, ns, 1200h: r² =0.226, ns, 1800h: r² =0.343, ns)