Table 5.
Subanalyses by selected study and intervention characteristics.
| Intervention characteristic | ka | Risk ratio (95% CI) | χ2 (df) | I2 | |
| Overall effect size | 12 | 1.5 (1.3-1.7) | 31.7 (11) | 65.2 | |
| Randomized controlled trials only | 8 | 1.6 (1.2-2.1) | 29.1 (7) | 76.0 | |
| Quasi-experimental | 4 | 1.4 (1.3-1.6) | 2.1 (3) | 0 | |
| Direct facilitation of HIV testing | |||||
|
|
Yes | 7 | 1.6 (1.4-1.9) | 13.8 (6) | 65.2 |
|
|
No | 5 | 1.3 (1.0-1.6) | 9.4 (4) | 58.1 |
| Interactive intervention | |||||
|
|
Yes | 7 | 1.6 (1.4-1.8) | 15.0 (6) | 46.7 |
|
|
No | 5 | 1.1 (1.0-1.3) | 1.7 (4) | 65.2 |
| User involvement in design | |||||
|
|
Yes | 5 | 1.6 (1.3-2.0) | 9.4 (4) | 57.6 |
|
|
No or not reported | 6 | 1.4 (1.1-1.6) | 18.0 (5) | 66.7 |
| Theoretical basis to intervention | |||||
|
|
Yes | 9 | 1.6 (1.3-1.8) | 20.5 (8) | 61.0 |
|
|
No or not reported | 3 | 1.2 (0.9-1.7) | 6.2 (2) | 67.5 |
| Social media–based intervention | |||||
|
|
Yes—general | 4 | 1.7 (1.3-2.1) | 6.0 (3) | 49.8 |
|
|
Yes—gay oriented | 2 | 1.4 (1.2-1.7) | 2.0 (1) | 48.7 |
|
|
No | 6 | 1.4 (1.0-1.9) | 23.1 (5) | 78.4 |
| Single-dose intervention | |||||
|
|
Yes | 5 | 1.4 (1.0-1.9) | 22.4 (4) | 82.1 |
|
|
No | 6 | 1.5 (1.3-1.7) | 8.5 (5) | 41.2 |
ak: number of studies included in the subcategory.