“…A total of 30 studies 6 , 8 , 20 , 22 , 23 , 29 , 34 , 37 , 38 , 39 , 42 , 43 , 44 , 46 , 47 , 48 , 50 , 52 , 56 , 62 , 63 , 74 , 77 , 79 , 80 , 82 , 85 , 88 , 89 with 6 497 382 newborns assessed the incidence of operatively treated DDH. Of these, 3 studies 29 , 34 , 82 with 64 559 newborns used clinical screening, 16 studies 6 , 37 , 38 , 39 , 42 , 43 , 44 , 46 , 47 , 48 , 50 , 52 , 77 , 79 , 85 , 88 with 855 109 newborns used selective screening, and 11 studies 8 , 20 , 22 , 23 , 56 , 62 , 63 , 74 , 80 , 89 with 5 577 714 newborns use...…”