Table 2.

Hierarchical Regression Analysis for Variables Predicting Adolescent Substance Problems at three month follow-up (N=90)

Predictors	B	β	t	p	ESa	ΔR2
Step 1						0.192
Baseline SPS	0.33	0.35	3.63	0.000*	0.12
Socioeconomic status	−0.07	−0.29	−3.02	0.003*	0.08
Step 2						0.032
Depression	0.08	0.06	.58	0.560	0.00
Conduct Disorder	0.20	0.16	1.49	0.141	0.02
Step 3						0.002
Depression X Conduct Disorder	−0.22	−0.07	−0.69	0.490	0.00

Note.

^aEffect size measured by squared semi-partial correlations (Type II).

^*p < .05.

SPS = Substance Problem Scale; DSS = Depressive Symptom Scale; CDS = Conduct Disorder Scale.