. Author manuscript; available in PMC: 2022 Feb 1.

Published in final edited form as: Dev Psychopathol. 2021 Aug;33(3):792–802. doi: 10.1017/S095457942000005X

Table 3.

Adolescent Alcohol and Marijuana Use Frequency (Ages 13–17)

	Adolescent Alcohol and Marijuana Use Frequency (Ages 13–17)
	r	β	ΔR²	R²
Step I. Demographic Factors
Gender (1-M; 2=F)	−.18^*	.03
Total Family Income (13)	.20^**	.07
Statistics for Step			.068^**	.068^**
Step II. Baseline Assessments
Age of first use	−.31^***	−.04
Statistics for Step			.106^***	.174
Step III. Adolescent-era Risks
Family conflict (13, 16)	.15^*	.12^*
Popularity with Peers (13)	.35^***	.32^***
Adol. Criminal Behavior (13–17)	.42^***	.30^***
Close Peer Use Frequency (13–17)	.50^***	.31^***
Statistics for Step			.263^***	.437
Step IV. Developmental Risks
Social Skills (13–17)	−.17^*	−.20^***
Self-concept (13–17)	−.10	.04
Statistics for Step			.055^**	.492

Note.

^***

p < .001.

^**

p < .01.

p < .05.

β weights are from final model. Age of assessments are included in parentheses.