“…Table 2 outlines the characteristics of the included interventions and the engagement outcomes. The included studies had a sample size ranging from 6 [ 61 ] to 766 [ 31 ] and included multiple RCTs (16/39, 41%) [ 30 , 31 , 33 - 35 , 37 - 39 , 43 - 45 , 48 , 50 , 57 , 63 , 67 , 68 ], with most studies being conducted in the United States (22/39, 56%) [ 29 - 31 , 33 , 34 , 37 - 41 , 43 , 45 , 46 , 48 , 50 , 54 , 57 , 59 , 60 , 66 - 68 ]. Of the 39 studies included in the review, 13 (33%) explored intervention effects in the context of routine care implementation [ 29 , 32 , 36 , 41 , 42 , 49 , 51 , 52 , 58 , 60 - 62 , 64 ], with the remainder exploring intervention effects often using a blinded controlled trial design.…”