“…Overall 46 studies [ 2 , 20 , 21 , 22 , 23 , 24 , 26 , 27 , 28 , 29 , 30 , 32 , 40 , 43 , 45 , 49 , 50 , 51 , 53 , 61 , 63 , 65 , 68 , 69 , 72 , 74 , 75 , 76 , 77 , 78 , 79 , 80 , 81 , 82 , 83 , 84 , 85 , 86 , 87 , 88 , 89 , 90 , 91 , 92 , 93 , 94 ] reported on retention on ART or being on ART and 34 (74%) provided clear definitions of numerators and denominators. The majority of studies were longitudinal (29 studies, 63%), 13 were cross‐sectional and four of mixed design.…”