Table 2 Summary of meta-analysis by outcome, target population and country development
From: Peer education for HIV prevention among high-risk groups: a systematic review and meta-analysis
| Â | HIV testing | Equipment sharing | Unprotected sex | Condom use | Condom use with regular partners | Condom use with casual partners | Consistent condom use | HIV prevalence |
|---|---|---|---|---|---|---|---|---|
Size of population | 12775 | 13830 | 6289 | 46130 | 36622 | 34589 | 41582 | 28061 |
Overall pooled effect size (95%CI) | 3.19* (2.13,4.79) | 0.52* (0.35,0.76) | 0.82* (0.72,0.94) | 2.66* (2.11,3.36) | 2.45* (1.64,3.66) | 2.79* (2.13,3.66) | 1.80* (1.47,2.21) | 0.64* (0.47,0.87) |
I 2 for heterogeneity | 92% | 93% | 50% | 90% | 95% | 84% | 86% | 83% |
Pooled effect size by target population | ||||||||
 MSM | 3.71* (2.09,6.57) | NA | 0.51* (0.34,0.76) | 1.59* (1.42,1.78) | 2.22* (1.54,3.20) | 2.21* (1.32,3.71) | 1.26* (1.07,1.66) | 0.94 (0.58,1.52) |
 IDUs | 2.86* (2.07,3.97) | 0.52* (0.35,0.76) | 0.92 (0.80,1.07) | 2.84* (1.08,7.48) | NA | 7.13 (1.97,25.83) | 1.03 (0.78,1.35) | 0.46* (0.34,0.63) |
 FSWs | 2.76* (1.08,7.07) | NA | 0.41* (0.21,0.77) | 3.19* (2.41,4.23) | 2.40* (1.32,4.35) | 3.07 (2.40,3.93) | 2.44* (1.85,3.21) | 0.75 (0.51,1.09) |
Pooled effect size by development | ||||||||
 Developed country | 1.59* (1.05,2.42) | 0.71* (0.57,0.88) | 0.82* (0.70,0.95) | 1.87* (1.44,2.41) | NA | NA | NA | NA |
 Developing country | 4.07* (2.68,6.16) | 0.31* (0.14,0.71) | 0.67 (0.35,1.28) | 2.58*(2.01,3.30) | 2.45*(1.64,3.66) | 2.71*(2.07,3.56) | 1.91* (1.48,2.46) | 0.67* (0.47,0.96) |