Table 4.
Effect Sizes (ES) Within the Integrated Psychological Therapy (IPT) Groups and the Subsumed Control Groups (CGs): Global Therapy Effect Controlled by Centers, Treatment Settings, and State of Illness
| IPT
|
CG
|
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| K | N | ES | ESw (95% CI) | Z | QW | K | N | ES | ESw (95% CI) | Z | QW | |
| Centers | ||||||||||||
| Academic centers | 10 | 258 | .63 | .56 (.38 to .73) | 6.19** | 5.43 | 5 | 102 | .25 | .31 (.01 to .61) | 2.06* | 1.63 |
| Nonacademic centers | 13 | 288 | .51 | .50 (.34 to .67) | 5.92** | 2.90 | 13 | 230 | .09 | .14 (−.05 to .32) | 1.43 | 1.85 |
| Multicenters | 4 | 90 | .47 | .44 (.22 to .66) | 3.96** | 2.01 | 2 | 30 | .06 | .05 (−.46 to .56) | 0.20 | 0.07 |
| Treatment setting | ||||||||||||
| Inpatients | 20 | 475 | .57 | .53 (.40 to .66) | 8.07** | 9.39 | 15 | 287 | .14 | .20 (.03 to .37) | 2.29* | 3.81 |
| Outpatients | 5 | 105 | .53 | .49 (.22 to .77) | 3.50** | 1.00 | 5 | 75 | .07 | .08 (−.24 to .40) | 0.50 | 0.55 |
| State of illness | ||||||||||||
| Symptom-stabilized patients | 20 | 446 | .57 | .52 (.39 to .66) | 7.67** | 9.39 | 16 | 264 | .10 | .14 (−.04 to .32) | 1.57 | 4.36 |
| Postacute patients | 6 | 174 | .51 | .50 (.29 to .72) | 4.62** | 1.34 | 4 | 98 | .24 | .25 (−.03 to .53) | 1.73 | 0.04 |
Note: CG, placebo-attention conditions and standard care subsumed; K, number of studies; N, number of patients; ES, unweighted effect sizes within the group; ESw, weighted effect sizes within the group; 95% CI, 95% confidence interval; Z, significance statistic within the group; QW, homogeneity statistics; χ2, 1-tailed. df = K − 3; multicenters, predominantly nonacademic centers; symptom-stabilized patients, stabilized residual state.
*P < .05, **P < .01.