Table 2.

Parameter estimates from mixed effect model.

	Estimate	SE	df	t-value	p-value
Model for waking cortisol, β1i
Intercept, β1	−0.907	0.138	1126	−6.580	<.001
LA, β3	0.086	0.069	261	1.266	0.207
EA, β4	−0.054	0.067	261	−0.809	0.419
Age (mean-centered), β5	−0.044	0.012	261	−3.733	<.001
Time Since Wake, β6	0.021	0.007	1126	3.022	0.003
Wake Time (mean-centered), β7	0.000	0.000	1126	−0.450	0.653
Granger Score, β8	0.001	0.028	1126	0.049	0.961
Sex, β9	−0.028	0.054	261	−0.518	0.605
Day 2, β10	−0.053	0.036	1126	−1.474	0.141
Day 3, β11	−0.030	0.037	1126	−0.811	0.418
Model for 30 m cortisol slope, β2i
Intercept, β2	0.411	0.231	1126	1.777	0.076
LA, β12	−0.163	0.063	1126	−2.592	0.010
EA, β13	0.019	0.062	1126	0.304	0.761
Age (mean-centered), β14	0.042	0.011	1126	3.863	<.001
Time Since Wake, β15	−0.030	0.008	1126	−3.502	<.001
Wake Time (mean-centered), β16	0.000	0.000	1126	−2.263	0.024
Granger Score, β17	0.027	0.028	1126	0.980	0.328
Sex, β17	−0.082	0.050	1126	−1.639	0.102
Day 2, β18	−0.028	0.051	1126	−0.551	0.582
Day 3, β19	−0.059	0.052	1126	−1.133	0.257

Residual and random effects Estimate (95% confidence interval)
sd(eijk)	0.389 (0.371, 0.407)
sd(b1i)	0.351 (0.309, 0.398)
sd(b2i)	0.192 (0.132, 0.278)
cor(b1i, b2i)	−0.649 (−0.802, −0.415)