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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

 HIV testingEquipment sharingUnprotected sexCondom useCondom use with regular partnersCondom use with casual partnersConsistent condom useHIV prevalence
Size of population127751383062894613036622345894158228061
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 heterogeneity92%93%50%90%95%84%86%83%
Pooled effect size by target population
 MSM3.71* (2.09,6.57)NA0.51* (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)
 IDUs2.86* (2.07,3.97)0.52* (0.35,0.76)0.92 (0.80,1.07)2.84* (1.08,7.48)NA7.13 (1.97,25.83)1.03 (0.78,1.35)0.46* (0.34,0.63)
 FSWs2.76* (1.08,7.07)NA0.41* (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 country1.59* (1.05,2.42)0.71* (0.57,0.88)0.82* (0.70,0.95)1.87* (1.44,2.41)NANANANA
 Developing country4.07* (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)
  1. *p < 0.05; NA not applicable to structure