“…Eighteen studies (Agha & van Rossem, 2004; Asamoah, 1999; Merati et al, 1997; Ford et al, 2000; Morisky et al, 2006; Broadhead et al, 2006; Ergene, Cok, Tumer & Unal, 2005; Gao et al, 2002; Ozcebe, Akin & Aslan, 2004; Kinsler, Sneed, Morisky & Ang, 2004; Leonard et al, 2000; Morisky, Ang, Coly & Tiglao, 2004; Norr, Norr, McElmurry, Tlou, & Moeti, 2004; Wang & Keats, 2005; Williams et al, 2003; Vaz, Gloyd, & Trindade, 1996; Laukamm-Josten et al, 2000; Walden, Mwangulube & Makhumula-Nkhoma, 1999), with a combined study population of 15,989, generated twenty-six discrete effect size estimates on HIV knowledge (Table 4). Pooled, these data show that peer education had a moderate but positive effect on this outcome (OR: 2.28, 95% CI: 1.88, 2.75).…”