“…Among the included studies, 25 studies focused on M&E 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 and four studies on OR. 46 , 47 , 48 , 49 Most of the included studies followed a cross-sectional design, whereas two were retrospective studies 29 , 44 and one was a cohort study.…”