Table 3.

Associations of cortisol with callous-unemotional traits, ADHD-symptoms, and externalizing behavior.

	AUC a				AUC d
	B	SE B	β	P	B	SE B	β	P
Full model
Constant	2108.5	698.4		0.006	8673.0	2991.6		0.008
CU-traits	−8.9	5.2	−0.31	0.098	−49.6	22.2	−0.38	0.034
Externalizing behavior	−11.5	8.3	−0.27	0.179	−22.2	35.5	−0.12	0.536
Impulsivity	8.8	39.3	0.05	0.825	−67.3	105.4	−0.14	0.529
Hyperactivity	−32.3	24.6	−0.30	0.201	−349.5	168.3	−0.44	0.048
Final model
Constant	1303.8	341.2		0.001	7211.4	1596.0		<0.001
CU-traits	−9.3	4.9	−0.32	0.068	−52.4	21.7	−0.40	0.023
Impulsivity					−459.5	130.1	−0.58	0.002
Hyperactivity	−44.4	18.1	−0.41	0.021

Multiple linear regression; AUC _a : area under the curve of cortisol levels 1 h after awakening with respect to zero; AUC _d : area under the curve with respect to diurnal cortisol over 12 h; CU: callous-unemotional.

R ² full model AUC _a = 0.30;R ² final model AUC _a = 0.25; R ² full model AUC _d = 0.38; R ² final model AUC _d = 0.34.