. Author manuscript; available in PMC: 2016 Jun 1.

Published in final edited form as: J Am Acad Child Adolesc Psychiatry. 2015 Feb 28;54(6):445–453.e2. doi: 10.1016/j.jaac.2015.02.009

Table 3.

Cannabis Use Frequency

	Marijuana Use Frequency

	Parameter Estimate (β)	SE
During Treatment

Intercept	2.12^***	0.11
Time	−0.22^***	0.042
Treatment Condition ^a	X²(2)=1.34, ns
MET/CBT+CM vs. MET/CBT	−0.18	0.15
MET/CBT+CM+PT vs. MET/CBT	−0.084	0.16
MET/CBT+CM+PT vs. MET/CBT+CM	0.095	0.16
Time × Treatment Condition ^a	X²(2)=0.04, ns
Time × MET/CBT+CM vs. Time × MET/CBT	−0.012	0.062
Time × MET/CBT+CM+PT vs. Time × MET/CBT	−0.0079	0.059
Time × MET/CBT+CM+PT vs. Time × MET/CBT+CM	0.0045	0.063
Posttreatment

Intercept	1.33^***	0.13
Time	0.024	0.013
Treatment Condition ^a	X²(2)=1.22, ns
MET/CBT+CM vs. MET/CBT	−0.22	0.20
MET/CBT+CM+PT vs. MET/CBT	−0.11	0.20
MET/CBT+CM+PT vs. MET/CBT+CM	0.11	0.20
Time × Treatment Condition^a	X²(2)=2.73, ns
Time × MET/CBT+CM vs. MET/CBT	0.031	0.021
Time × MET/CBT+CM+PT vs. MET/CBT	−0.0021	0.020
Time × MET/CBT+CM+PT vs. Time × MET/CBT+CM	−0.033	0.021

Note: CBT = cognitive-behavioral therapy; CM = contingency management; MET = motivational enhancement therapy; PT = parent training.

Generalized estimating equations (GEE) Chi-square score statistic for overall (type III) test of treatment effect indicated in this row.

p≤0.05,

^**

p≤0.01,

^***

p≤0.001