“…A total of 4 different outcome variables were identified in this review. The Western Ontario and McMaster Universities (WOMAC) Osteoarthritis Indexes that were reported in 4 studies [21, 23, 29, 30] included the WOMAC pain (4 studies) [21, 23, 29, 30], WOMAC stiffness (3/4 studies) [21, 23, 30], and WOMAC function (3/4 studies) [21, 23, 30]; pain was reported in 5 studies [20, 23, 28, 29, 31]; Lequesne index was reported in 3 studies [20, 22, 29]; and FTA was report in 2 studies [20, 22]. According to the different intervention time of the wedge insole, Toda et al [22] divided the treatment components into three subgroups compared with the flat insole.…”