Table 2.
Primary outcomes (n=53)
| Group Effect | |||||||
|---|---|---|---|---|---|---|---|
| Outcome | Condition | Baseline | 3 months | 6 months | df | χ2 | ES |
| Continuous variables1 | |||||||
| CAPS Total Score | ICBT | 75.75(19.94) | 36.08(19.19) | 46.50(21.75) | 1 | 4.14* | –0.17 |
| IAC | 84.10(22.57) | 52.60(21.86) | 49.75(28.64) | ||||
| CAPS B Re-experiencing | ICBT | 22.50(7.07) | 10.69(4.73) | 12.07(6.81) | 1 | 6.81** | –0.40 |
| IAC | 24.86(8.45) | 16.10(7.03) | 14.38(8.55) | ||||
| CAPS C Avoidance | ICBT | 30.00(9.36) | 13.54(8.92) | 17.14(11.62) | 1 | 0.26 | 0.11 |
| IAC | 32.38(10.69) | 18.00(12.89) | 15.88(15.29) | ||||
| CAPS D Arousal | ICBT | 23.25(8.68) | 11.85(9.61) | 17.29(6.72) | 1 | 4.75* | –0.35 |
| IAC | 26.86(7.79) | 18.50(5.66) | 19.50(8.00) | ||||
| ASI Alcohol Composite | ICBT | .25(.29) | .07(.15) | .11(.20) | 1 | 0.00 | 0.75 |
| IAC | .24(.22) | .05(.07) | .03(.06) | ||||
| ASI Drug Composite | ICBT | .19(.15) | .12(.10) | .10(.09) | 1 | 0.02 | 0.03 |
| IAC | .20(.09) | .11(.08) | .10(.10) | ||||
| Alcohol Use (Days) | ICBT | 23.03(27.57) | 1.31(2.43) | 8.14(23.75) | 1 | 0.74 | 0.63 |
| IAC | 15.69(20.10) | 0.20(0.63) | 0.25(0.71) | ||||
| Drug Use (Days) | ICBT | 36.28(35.54) | 16.15(32.00) | 12.68(25.87) | 1 | 5.04* | 0.41 |
| IAC | 37.56(10.36) | 25.70(17.01) | 26.24(16.14) | ||||
| ASI Psychiatric Composite | ICBT | .49(.18) | .28(.22) | .35(.19) | 1 | 2.64 | –0.42 |
| IAC | .56(.15) | .42(.21) | .42(.17) | ||||
| BDI | ICBT | 21.10(10.19) | 13.35(9.83) | 19.68(12.74) | 1 | 3.45 | –0.47 |
| IAC | 37.56(10.36) | 25.70(17.01) | 26.24(16.14) | ||||
| Categorical variables2 | |||||||
| PTSD Diagnosis - Positive | ICBT | 32(100.0) | 4(30.8) | 7(50.0) | 1 | 0.57 | 0.52 |
| IAC | 21(100.0) | 5(50.0) | 2(25.0) | ||||
| Positive alcohol breathalyzer | ICBT | 2(6.3) | 0(0.0) | 0 (0.0) | 1 | 1.25 | –0.74 |
| IAC | 0(0.0) | 1(10.0) | 1(12.5) | ||||
| Positive urine drug screen | ICBT | 15(46.9) | 9(75.0) | 6(46.2) | 1 | 0.11 | –0.08 |
| IAC | 10(47.6) | 7(77.8) | 4(50.0) | ||||
1
Values are means and standard deviation;
2
Values are given as number and percent;
***
p<=.001;
**
p=.01;
*
p=.05
Note. ICBT = integrated cognitive behavioral therapy; IAC = individual addiction counseling; CAPS = Clinician Administered PTSD Scale; ASI = Addiction Severity Index; BDI = Beck Depression Inventory.