. Author manuscript; available in PMC: 2014 Sep 5.

Published in final edited form as: Int J Cogn Ther. 2014 Aug 26;6(4):325–341. doi: 10.1521/ijct.2013.6.4.325

Table 3.

Hierarchical Regression Analysis for Variables Predicting Adolescent Substance Problems at six month follow-up (N=73)

Predictors	B	β	t	p	ES^a	ΔR²
Step 1						0.344
Baseline SPS	0.08	0.10	0.95	0.347	0.01
Three month SPS	0.47	0.55	5.39	0.000^*	0.27
Step 2						0.037
Depression	−0.25	−0.22	−2.01	0.048^*	0.04
Conduct Disorder	0.08	0.07	0.65	0.518	0.00
Step 3						0.020
Depression X Conduct Disorder	−0.40	−0.15	−1.49	0.142	0.02

Note.

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

p < .05.

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