“…The median postoperative PROM follow-up rate was 70%, and the median number of patients was 2970. Overall, only 8 studies reported preoperative PROMs [11] , [12] , [18] , [19] , [20] , [21] , [22] , [23] , 4 studies did not collect [13] , [17] , [24] , [25] , and 9 studies did not report whether preoperative PROMs were collected [14] , [15] , [16] , [26] , [27] , [28] , [29] , [30] , [31] .…”