. 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 5.

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

Predictors	B	β	t	p	ES^a	ΔR²
Step 1						0.755
Baseline SFS	−0.04	−0.04	−0.64	0.525	0.00
Three month SFS	0.99	0.89	12.94	0.000^*	0.58
Step 2						0.001
Depression	−0.00	−0.02	−0.33	0.742	0.00
Conduct Disorder	0.00	0.03	0.42	0.674	0.00
Step 3						0.015
Depression X Conduct Disorder	−0.02	−0.15	−2.41	0.019^*	0.02

Note.

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

p < .05.

SFS = Substance Frequency Scale; DSS = Depressive Symptom Scale; CDS = Conduct Disorder Scale.