Table 6.
Summary of meta-analysis results for approach to prevention programs analysed by number of sessions delivered.
| Sessions | Post Intervention | 3–9 Month Follow-up | 12-Month Follow-up | |||
|---|---|---|---|---|---|---|
| Depressive disorder (RD) | Depression symptoms (SMD) | Depressive disorder (RD) | Depression symptoms (SMD) | Depressive disorder (RD) | Depression symptoms (SMD) | |
| 8 or more | 13 studies; 15 intervention arm; N = 1503 RD −0.13 [−0.20, −0.07] I2 = 71% |
32 studies; 39 intervention arm; N = 8014 SMD −0.13 [−0.28, 0.01] |
12 studies; 16 intervention arm; N = 1881 RD −0.12 [−0.17, −0.07] I2 = 55% |
22 studies; 28 intervention arm; N = 5167 SMD −0.09 [−0.28, 0.10] |
9 studies; 10 intervention arms; N = 1149 RD −0.08 [−0.16, −0.00] I2= 75% |
16 studies; 21 intervention arm; N = 5047 SMD −0.11 [−0.17, −0.04] |
| <8 | 1 study; 1 intervention arm; N = 273 RD −0.01 [−0.11, 0.09] |
7 studies; 7 intervention arms; N = 1251 SMD −0.17 [−0.36, 0.02] |
2 studies; 2 intervention arms; N = 373 RD −0.07 [−0.14, 0.01] |
5 studies; 5 intervention arms; N = 1184 SMD −0.13 [−0.26, 0.00] |
0 studies | 0 studies |
| Depressive disorder (RD) | Depression symptoms (SMD) | Depressive disorder (RD) | Depression symptoms (SMD) | Depressive disorder (RD) | Depression symptoms (SMD) | |
| Subgroup differences |
χ2 = 4.50, p = 0.03 |
χ2 = 0.09, p = 0.76 | χ2 = 1.28, p = 0.26 | χ2 = 0.09, p = 0.76 | NA | NA |
RD: Risk Difference; SMD: Standardised Mean Difference; Bold font indicates significant results.