Table 3.

Results from Regression Analyses Predicting Adolescent Log Cortisol at Time 2

Step	Variable	ΔR2	Std. β	t	p
1	Control Variables	.199			<. 01
	Youth Ethnicitya
	African American		0.28	2.55	.01
	Hispanic		0.12	1.31	.20
	Native American		0.26	2.56	.01
	Other		0.04	0.39	.70
	Income-to-Needs Ratio		0.19	2.08	.04
	Time of Day		−0.33	−3.69	<.001
2	Adolescent Log Cortisol (Time 1)	.122	0.40	4.32	<.001
3	Parent Log Cortisol (Time 2)	.062	0.26	3.23	<.01
	Overall R2	.383			<.001

Note: Standardized regression coefficients. Each step incorporates all predictors from the previous step.

^a= Dummy coding was used to incorporate ethnicity in the model with European Americans used as the reference group.