“…Valid studies, n (%) a,b Characteristic and categories for each characteristic Observational studies (n=18, 21%) [23,29,72,97,107] 5 (28) Prospective cohort study [46,54,55,70,86,87,91,101,102] 9 (50) Retrospective cohort study [65] 1 (6) Ambispective cohort study [103,105,106] 3 (17) Cross-sectional study RCTs c (n=36, 42%) [28, 30-33, 35, 36, 38-40, 42, 43, 49, 56, 61, 63, 74, 75, 80, 83, 84, 93, 98] 23 (64) Parallel design [69,71,88] 3 (8) Cross-over design [41, 47, 50-53, 66, 81, 85, 89] 10 (28) Cluster RCT [44,45,59,78,108] 5 (6) PCT d [34, 37, 48, 57, 58, 62, 64, 67, 68, 73, 76, 77, 79, 92, 94-96, 99, 100, 104, 109, 111] 22 (26) Single-arm trial [60,82,90,110] 4 ( 5) Other e a Number of studies and percentages were presented. The percentages of valid, unspecified, and unapplicable studies were calculated within the total studies (N=85), while the percentages for each characteristic were calculated within the valid studies.…”