“…The most common disease focus was on NCDs (n=15) [ 22 , 25 , 26 , 29 , 30 , 34 , 37 - 39 , 42 , 45 , 46 , 52 , 56 , 57 ], whereas 12 studies focused on infectious diseases [ 33 , 41 , 51 , 53 , 54 , 58 - 64 ] and 8 studies were designed for maternal and child health [ 36 , 40 , 43 , 47 - 49 , 55 , 65 ]. A wide range of study designs was used to evaluate or describe the mHealth intervention, including 18 exploratory studies that described, validated, or pilot-tested mHealth interventions without any quantitative outcome assessment [ 18 - 28 , 58 - 62 , 64 , 66 ]. A total of 31 studies quantitatively evaluated the mHealth intervention [ 29 - 57 , 63 , 65 ], of which 19 utilized a RCT design [ 29 - 35 , 38 - 40 , 43 , 47 , 51 - 53 , 56 , 57 , 63 , 65 ] whereas the remainder used a quasi-experimental study design (n=12).…”