“…However, a number of studies only presented data on the worst experienced VAS score (13, 16, 17, 22, 28, 35), and data on the mean VAS scores during the early and late post‐operative periods were therefore not extractable in these studies. VAS scores and supplemental analgesic consumption had to be extrapolated from presented graphs in 14 studies (9–11, 18, 20, 23, 24, 26, 27, 30–34) and six studies (11, 20, 21, 24, 30, 32), respectively. Details of the included studies are shown in Tables 1–4.…”