Figure 4).

Western Ontario and McMaster University Osteoarthritis Index (WOMAC) scores at baseline, on the day of surgery (DOS) and six weeks after total hip arthroplasty. Data presented as mean ± SD. Six weeks postoperatively (post-op), patients who received pregabalin and celecoxib (Group 1 [G1]) for two weeks before and three weeks after surgery scored significantly better on the pain (A), stiffness (B) and physical function (C) subsections of the WOMAC compared with patients who received placebo (Group 2 [G2]) for the same length of time. Cumulative WOMAC scores were also significantly improved six weeks postoperatively in patients who received active treatment compared with the placebo group (D). A lower WOMAC score indicates less pain and stiffness and better physical function. *P<0.05.