. Author manuscript; available in PMC: 2011 Jul 1.

Published in final edited form as: Behav Res Ther. 2010 Mar 16;48(7):588–598. doi: 10.1016/j.brat.2010.03.010

Table 5.

ANCOVA omnibus test results with substance use during aftercare as the outcome, and PTSD diagnostic status or change as the predictor.

Predictor Variable
Diagnosis-Baseline	F(3)=.55,p>.64,η_p=.01
Diagnosis–6 Mos		F(3)=2.53,p=.06, η_p=.05
Diagnosis–12 Mos			F(3)=3.83^*,η_p=.07
Diagnostic Change– Baseline to 6 Mos				F(2)=5.07^**, η_p=.06
Diagnostic Change– 6 Mos to 12 Mos					F(3)=6.88^**, η_p=.13
Covariates

Age	F(1)=4.35^*, η_p=.02	F(1)=2.86, p=.09, η_p=.02	F(1)=4.10^* η_p=.03	F(1)=3.32, p=.07, η_p=.02	F(1)=4.63^*, η_p=.03
Treatment Group	F(1)=4.87^*, η_p=.03	F(1)=4.59^*, ηp=.03	F(1)=4.98^* η_p=.03	F(1)=5.95^*, η_p=.04	F(1)=2.71, p=.10, η_p=.02
Wks Abstinent-Phs I	F(1)=50.22^**, η_p=.22	F(1)=46.21^**, η_p=.23	F(1)=54.85^**, η_p=.27	F(1)=46.95^**, η_p=.23	F(1)=57.93^**, η_p=.29

Corrected Model	F(6,177)=13.27^** η_p=.31	F(6,156)=13.26^**, η_p=.34	F(6,145)=15.11^**, η_p=.39	F(5,156)=16.73^**, η_p=.35	F(6,143)=7.01^**, η_p=.42

p<.05

^**

p<.01. Diagnosis refers to PTSD diagnosis. Wks Abstinent-Phs I refers to the number of consecutive weeks of abstinence during Phase I.