TABLE 3.
Study Groupings and Results for Analyses of Variance
| Study | Mean ES (SE) | QBa | P | Qw(df) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | ||||||
| Treatment modality | Individual | x | x | x | x | x | 0.30 (0.15) | 2.70 | .101 | 3.19 (4) | ||||||
| Group | x | x | x | x | x | x | 0.76 (0.24) | 6.06 (5) | ||||||||
| Analytic strategy | ITT | x | x | x | x | x | x | 0.26 (0.12) | 4.94* | .026 | 4.61 (5) | |||||
| Not ITT | x | x | x | x | x | 0.94 (0.28) | 3.97 (4) | |||||||||
| Treatment duration | <867 min | x | x | x | x | x | x | x | 0.60 (0.22) | 0.16 | .685 | 6.35 (6) | ||||
| >867 min | x | x | x | x | 0.48 (0.20) | 4.34 (3) | ||||||||||
| Sample | Student/community | x | x | x | x | x | x | x | 0.65 (0.23) | 1.00 | .318 | 6.97 (6) | ||||
| Outpatient/juvenile justice | x | x | x | x | 0.39 (0.10) | 2.88 (3) | ||||||||||
| Type of control group | Inactive | x | x | x | x | x | x | x | x | 0.72 (0.17) | 7.90** | .005 | 8.20 (7) | |||
| Active | x | x | x | 0.11 (0.13) | 2.02 (2) | |||||||||||
| Setting | Nonclinical | x | x | x | x | x | 0.95 (0.27) | 5.94* | .015 | 4.09 (4) | ||||||
| Clinical | x | x | x | x | x | x | 0.25 (0.12) | 4.63 (5) | ||||||||
| Methodological rigor | <17 CONSORT criteria met | x | x | x | x | x | x | 0.90 (0.12) | 11.30** | .001 | 5.39 (5) | |||||
| >17 CONSORT criteria met | x | x | x | x | x | 0.14 (0.09) | 4.00 (4) | |||||||||
| Gender representation | <37.3% male | x | x | x | x | x | x | 0.64 (0.18) | 0.60 | .437 | 6.06 (5) | |||||
| >37.3% male | x | x | x | x | x | 0.42 (0.23) | 5.31 (4) | |||||||||
| Outside services | Permitted | x | x | x | x | 0.27 (0.11) | 3.09 | .079 | 0.66 (3) | |||||||
| Not permitted | x | x | x | x | x | x | x | 0.76 (0.25) | 5.37 (6) | |||||||
| Therapist vocation | Clinicians | x | x | x | x | x | x | x | 0.41 (0.17) | 2.22 | .136 | 7.58 (6) | ||||
| Research assistants/graduate students | x | x | x | x | 0.86 (0.25) | 4.03 (3) | ||||||||||
| Severity | Less depressed | x | x | x | x | x | x | x | 0.56 (0.16) | 0.20 | .887 | 7.66 (3) | ||||
| More depressed | x | x | x | x | 0.51 (0.31) | 3.64 (3) | ||||||||||
Note: Study: 1 Reynolds and Coats, 1986; 2 Kahn and Kehle, 1990; 3 Lewinsohn et al., 1990; 4 Vostanis et al., 1996a; 5 Wood et al., 1996; 6 Brent et al., 1997; 7 Clarke et al., 1999; 8 Rossello and Bernal, 1999; 9 Clarke et al., 2002; 10 Rohde et al., 2004; 11 Treatment for Adolescents With Depression Study (TADS) Team, 2004. ES = effect size; ITT = intent-to-treat analysis; CONSORT = Consolidated Standards of Reporting Trials.
a
df for QB = 1.
*
p < .05.
**
p < .01.