Table 3.
Between-group comparison of the change in the WOMAC pain and function scores relating to the preoperative score 2 and 4 weeks after TKA.
| Total | Normal Weight | Overweight | Obese | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ΔWOMAC | n | Mean or Median |
±SD or (IQR) |
n | Mean or Median |
±SD or (IQR) |
n | Mean or Median |
±SD or (IQR) |
n | Mean or Median |
±SD or (IQR) |
p | η2
or r |
|
| Pain | 2w | 92 | −10.65 | ±22.75 | 25 | −12.40 | ±24.80 | 46 | −9.67 | ±22.59 | 21 | −10.71 | ±21.52 | 0.892 a | 0.003 |
| 4w | 90 | −18.72 | ±21.22 | 24 | −17.92 | ±23.63 | 45 | −18.33 | ±21.32 | 21 | −20.48 | ±18.90 | 0.910 a | 0.002 | |
| Function | 2w | 92 | −1.81 | ±19.47 | 25 | −2.71 | ±23.14 | 46 | 0.13 | ±18.07 | 21 | −4.97 | ±18.10 | 0.593 a | 0.012 |
| 4w | 90 | −11.76 | (−23.90, −1.47) |
24 | −16.18 | (−26.47, 2.21) |
45 | −10.29 | (−21.32, −2.94) |
21 | −11.76 | (−28.68, −2.94) |
0.769 b | 0.056 | |
The values presented are n, mean ± SD, or median (IQR) for categorical data, parametric data, and nonparametric variables, respectively. Abbreviations: Δ: delta indicating the change; SD: standard deviation; IQR: interquartile range; η2: eta squared; r: effect size; WOMAC: Western Ontario and McMaster Universities Osteoarthritis Index; TKA: total knee arthroplasty; n: number. Normal weight: BMI ≤ 24.99 kg/m2, overweight: 25 ≤ BMI ≤ 29.99 kg/m2, obese: BMI ≥ 30 kg/m2. a: one-way ANOVA, b: Kruskal–Wallis test.