Table 2.

Multilevel growth-curve model of associations between prior-day and same-day experience variables and diurnal cortisol parameters

Fixed effect	Coefficient	SE	t	P	Interpretation
Model for wakeup cortisol level, π0
Same-day symptoms/tired, β01, γ010	−0.082	0.030	−2.735	0.007	−8% per +1 SD
Prior-day symptoms/tired, β02, γ020	−0.016	0.028	−0.568	0.570	n.s.
Model for linear effect of time of day, π1
Same-day tense/angry, β11, γ110	0.007	0.003	2.090	0.037	1% flatter per SD
Prior-day tense/angry, β12, γ120	0.003	0.003	0.922	0.357	n.s.
Model for cortisol awakening response, π3
Same-day symptoms/tired, β31, γ310	−0.028	0.033	−0.840	0.401	n.s.
Prior-day symptoms/tired, β32, γ320	−0.062	0.039	−1.577	0.115	n.s.
Same-day lonely/sad/overwhelmed, β33, γ330	−0.017	0.038	−0.435	0.663	n.s.
Prior-day lonely/sad/overwhelmed, β34, γ340	0.114	0.042	2.694	0.008	+12% per +1 SD

The quadratic effect of time of day on cortisol and the same set of control variables as in Table 1 were also included in this analysis, and the same centering and fixing strategies were used. Results for these variables are omitted to conserve space because they were very similar to those presented in Table 1.