Table 5.
Mean pre- and postoperative WOMAC score of patients undergoing elective TKA
| Representative BMI midpoint | Mean (95% CI) | |||
|---|---|---|---|---|
| Preoperative WOMAC score | 6-month postoperative WOMAC score | 12-month postoperative WOMAC score | Difference in 6-month and 12-month postoperative WOMAC score | |
| 18 | 44.5 (39.8 to 49.1) | 9.5 (5.0 to 13.9) | 11.6 (7.3 to 15.9) | 2.1 (−1.7 to 5.9) |
| 21.75 | 45.6 (41.7 to 49.5) | 10.3 (6.6 to 14.0) | 11.5 (7.9 to 15.0) | 1.2 (−1.9 to 4.2) |
| 27.5 | 47.4 (44.4 to 50.3) | 11.6 (8.8 to 14.4) | 11.3 (8.5 to 14.0) | −0.3 (−2.4 to 1.8) |
| 32.5 | 48.9(46.4 to 51.5) | 12.7 (10.2 to 15.2) | 11.1 (8.7 to 13.5) | −1.6 (−3.1 to −0.5) |
| 37.5 | 50.4 (47.7 to 53.2) | 13.8 (11.1 to 16.5) | 10.9 (8.3 to 13.6) | −2.9 (−4.6 to −1.2) |
| 42.5 | 52.0 (48.4 to 55.5) | 14.9 (11.5 to 18.3) | 10.8 (7.5 to 14.1) | −4.1 (−6.5 to −1.8) |
BMI = body mass index; CI = confidence interval; WOMAC = Western Ontario and McMaster University Osteoarthritis Index; TKA = total knee arthroplasty.