Table 2.
Mean within-group differences in CES-D pretest and posttest scores
| Statement | Intervention (mean, SD) |
Control (mean, SD) |
||||||
|---|---|---|---|---|---|---|---|---|
| Pretest | Posttest | Difference | Effect size | Pretest | Posttest | Difference | Effect size | |
| Total | 20.5, 11.9 | 13.5, 10.4 | −7.0, 13.7∗ | −0.51 | 18.4, 11.9 | 16.5, 10.7 | −1.9, 10.9 | −0.17 |
| Depressed affect | 2.1, 2.1 | 1.4, 1.5 | −0.7, 2.4 | −0.29 | 1.8, 2.2 | 1.3, 1.7 | −0.6, 2.0 | −0.30 |
| Somatic | 4.4, 2.4 | 2.9, 2.2 | −1.5, 2.9∗ | −0.52 | 4.1, 2.6 | 4.2, 2.6 | 0.1, 2.7 | 0.04 |
| Positive affect | 6.7, 4.1 | 8.2, 3.4 | 1.5, 4.5 | −0.33 | 7.0, 3.4 | 7.0, 3.0 | 0.1, 4.1 | 0.02 |
| Interpersonal problems | 0.7, 1.1 | 0.6, 1.2 | −0.1, 1.2 | −0.08 | 0.8, 1.4 | 0.4, 0.8 | −0.4, 1.6 | −0.25 |
NOTE. Effect size equation: Cohen's d= (Mean Control–Mean Intervention)/SD Pooled.
Abbreviations: CES-D, Center for Epidemiologic Studies Depression Scale; SD, standard deviation.
∗
P < .01.