Table 1.
Baseline characteristics of all patients.
| Total (n = 102) | Normal Weight (n = 30) |
Overweight (n = 49) |
Obese (n = 23) | p | |||||
|---|---|---|---|---|---|---|---|---|---|
| Age | 75.00 | (71.75, 78.00) | 77.00 | (72.00, 79.25) | 75.00 | (73.00, 77.50) | 73.00 | (68.00, 77.00) | 0.068 b |
| Sex, number of women | 87 | 85.29% | 24 | 80% | 41 | 83.67% | 22 | 95.65% | 0.254 c |
| BMI (kg/m2) | 27.37 | ±4.11 | 23.39 | (22.05, 24.26) | 27.16 | (26.09, 28.75) | 31.63 | (30.83, 36.05) | <0.001 b * |
| Etiology, frequency of OA/RA | 94/8 | 92.16%/7.84% | 25/5 | 83.33%/16.57% | 46/3 | 93.88%/6.12% | 23/0 | 100% | 0.068 c |
| Number of comorbidities | 2.00 | (1.00, 3.00) | 2.00 | (1.00, 3.00) | 2.00 | (1.50, 3.00) | 2.00 | (1.00, 3.00) | 0.653 b |
| CCI | 1.00 | (0.00, 1.00) | 1.00 | (0.00, 1.00) | 1.00 | (0.00, 1.00) | 0.00 | (0.00, 1.00) | 0.196 b |
| Preoperative walking status | |||||||||
| Self-reliant | 66 | 64.71% | 20 | 66.67% | 32 | 65.31% | 14 | 60.87% | 0.902 c |
| Reliance on assistive devices | 36 | 35.29% | 10 | 33.33% | 17 | 34.69% | 9 | 39.13% | |
| FIM motor score | 85.00 | (79.75, 88.00) | 85.00 | (81.50, 88.00) | 85.00 | (79.00, 89.00) | 83.00 | (79.00, 87.00) | 0.510 b |
| FIM cognition score | 35.00 | (35.00, 35.00) | 35.00 | (33.75, 35.00) | 35.00 | (34.00, 35.00) | 35.00 | (35.00, 35.00) | 0.073 b |
| WOMAC pain score † | 40.10 | ±19.47 | 42.50 | ±20.67 | 39.18 | ±18.10 | 38.91 | ±21.26 | 0.727 a |
| WOMAC functional score † | 26.47 | (16.18, 38.60) | 30.88 | (19.85, 41.18) | 19.12 | (16.18, 37.50) | 27.94 | (17.65, 50.00) | 0.277 b |
| Duration of surgery (minutes) | 99.50 | (90.00, 101.25) | 95.00 | (85.50, 106.00) | 98.00 | (90.00, 109.50) | 106.00 | (100.00, 127.00) | 0.007 b |
| Duration of daily rehabilitation (hours) |
1.66 | (1.52, 1.84) | 1.66 | ±0.21 | 1.65 | ±0.24 | 1.66 | ±0.18 | 1.000 b |
The values presented are n, mean ± SD, or median (IQR) for categorical data, parametric data, and nonparametric variables, respectively. Abbreviations: BMI: body mass index; OA: osteoarthritis; RA: rheumatoid arthritis; CCI: Charlson Comorbidity Index; FIM: Functional Independence Measure; WOMAC: Western Ontario and McMaster Universities Osteoarthritis Index; n: number; SD: standard deviation; IQR: interquartile range. Normal weight: BMI ≤ 24.99 kg/m2, overweight: 25 ≤ BMI ≤ 29.99 kg/m2, and obese: BMI ≥ 30 kg/m2. a: one-way ANOVA, b: Kruskal–Wallis test, c: chi-square test. * p < 0.05. † Scales from 0 to 100, with 100 denoting the worst pain/function.