. Author manuscript; available in PMC: 2014 Mar 1.

Published in final edited form as: Addict Behav. 2012 Aug 31;38(3):1764–1775. doi: 10.1016/j.addbeh.2012.08.011

Table 2.

Summary of Tests of Treatment Effects on Outcome Variables. Values Shown are Fs (for PDA and Marijuana Problem Scale Scores) or Wald χ2 Values (for Continuous Abstinence). Maximum Likelihood Estimation Models Used. Effective N=215.

Dependent Variable	Effect Tested
Dependent Variable	Treatment (df = 2, 756)	Time (df=1, 192)	Treatment X Time (df=2,756)	Time² (df=1,192)	Treatment X Time² (df=2, 756)
Continuous Abstinence^a,^b	0.97	33.15^***	5.68	30.44^***	6.01^*
PDA Marijuana	0.79	229.19^***	3.00	159.72^***	3.55^*
Problem Scale Score	0.02	212.79^***	0.38	124.82^***	0.60

Baseline PDA used as a covariate in this model.

Only numerator df apply in these analyses. Note:

p < .05;

^***

p < .001. df = degrees of freedom.