Table 2.

Multilevel regression estimates predicting cortisol from trait rumination and covariates.

Fixed effects	Waking cortisol		Wake + 30 cortisol		CAR		Diurnal cortisol slope		Diurnal AUCg
Fixed effects	Est.	SE	Est.	SE	Est.	SE	Est.	SE	Est.	SE
Intercept: average level, γ₀₀	−1.763^**	0.146	−1.359^**	0.120	0.167^**	0.056	−0.119^**	0.021	80.813^**	3.576
Level 1 (day-specific)
Wake time, γ₁₀	−0.180^*	0.085	−0.196^**	0.062	0.036	0.044	0.015	0.012	−4.509^**	0.871
Track cap non-compliance, γ₂₀	0.257^*	0.117	−0.002	0.101	−0.084^*	0.037	−0.023^†	0.014	−1.173	1.862
Level 2 (person-specific)
Trait rumination, γ₀₁	−0.169^*	0.079	−0.084	0.065	0.040	0.030	0.017^*	0.008	1.491	1.326
White race/ethnicity, γ₀₂	−0.020	0.125	0.212^*	0.098	0.001	0.045	−0.053^**	0.018	−3.820	3.750
Family income, γ₀₃	0.089^†	0.048	0.034	0.045	−0.025	0.023	0.002	0.006	1.177	0.766
Pubertal status, γ₀₄	0.020	0.091	0.038	0.091	−0.015	0.035	0.030^**	0.011	5.454^**	1.993
No track cap, γ₀₅	−0.174	0.141					0.013	0.016	−2.838	2.975
Random effects
$σ_{ε}^{2}$ (L1 residual variance)	0.351^**	0.057	0.390^**	0.123	0.090^**	0.027	0.009^**	0.001	145.200^**	35.153
$σ_{u 0}^{2}$ (L2 residual variance)	0.233^**	0.076	0.122^**	0.034	0.009	0.006	0.002^*	0.001	83.649^**	21.523

Notes: 359 days nested within 122 individuals. Wake time within-person centred and all continuous Level 2 predictors grand-mean centred. Noncompliance, (1 = not compliant with sampling procedures), White race/ethnicity (1 = White), and no track cap (1 = did not use track cap) dummy coded. Outcomes calculated from log-based cortisol values (μg/dl). Est. = partial regression coefficient estimate. SE = robust standard error.

^†

p < .10.

p < .05.

^**

p < .01.