Table 2 Descriptive statistics. Patient characteristics, assessed pre-operatively
Patient characteristic | Total cohort, N = 354 | TKA, n = 238 (67.2%) | THA, n = 116 (32.8%) | p value |
|---|---|---|---|---|
Age (years), mean (SD) | 68.9 (9.2) | 69.5 (8.9) | 67.7 (9.9) | 0.09 |
Sex, N (%) | Â | Â | Â | 0.30 |
 Female | 185(52.0%) | 129 (54.2%) | 56 (48.3%) | |
 Male | 169 (48.0%) | 109 (45.8%) | 60 (51.7%) | |
BMI (kg/m2) | ||||
 Median (IQR) | 30.0 (26.6, 33.6) | 30.3 (27.0, 34.5) | 28.4 (26.1, 31.3) | 0.002* |
 Range | (18.1–48.8) Missing: n = 1 (0.3%) | (18.1–48.8) | (18.9–45.8) | |
ASA grade, N (%) | ||||
 1 | 27 (8.2%) | 12 (5.5%) | 15 (13.5%) | < 0.001* |
 2 | 180 (54.4%) | 111 (50.5%) | 69 (62.2%) | |
 3 | 122 (36.9%) | 97 (44.1%) | 25 (22.5%) | |
 4 | 2 (0.6%) | 0 (0%) | 2 (1.8%) | |
 Median (IQR) | 2 (2, 3) Missing: n = 23 (6.5%) | 2 (2, 3) | 2 (2, 2) | |
Pre-operative Hb (g/L) | ||||
 Mean (SD) | 137.9 (11.8) Missing: n = 4 (1.1%) | 137.5 (11.6) | 138.7 (12.1) | 0.40 |
Pre-operative pain (VAS 0–100) |  |  |  | 0.05 |
 Mean (SD) | 38.9 (26.3) Missing: n = 6 (1.7%) | 37.0 (26.7) | 42.8 (25.0) | |
Pre-operative function | ||||
 OKS/OHS (0–48) | ||||
  Mean (SD) | 25.5 (8.0) Missing: n = 2 (0.6%) | 26.0 (8.0) | 23.7 (7.9) | 0.02* |
 EQ-5D VAS (0–100) | ||||
  Median (IQR) | 80 (70, 90) | 80 (70, 90) | 80 (65, 90) | 0.11 |
  Range | (10–100) Missing: n = 4 (1.1%) | (10–100) | (18–100) | |
 mILAS (0-36) | ||||
  Median (IQR) | 0 (0.0, 0.0) | 0 (0.0, 0.0) | 0 (0.0, 0.0) | 0.16 |
  Range | (0–11) | (0–11) | (0–11) | |
 TUG (s) | ||||
  Median (IQR) | 8.79 (7.41, 11.09) | 8.76 (7.58, 11.05) | 8.98 (7.17, 11.28) | 0.56 |
  Range | (4.39–30.93) | (4.97–29.29) | (4.39–30.93) | |
 10mWT (s) | ||||
  Median (IQR) | 7.61 (6.49, 9.40) | 7.65 (6.52, 9.40) | 7.58 (6.44, 9.42) | 0.71 |
  Range | (4.23–27.02) | (4.23–22.94) | (4.75–27.02) | |
 RAPT score | ||||
  Mean (SD) | 9.48 (2.1) Missing: n = 5 (1.4%) | 9.3 (2.2) | 9.8 (2.0) | 0.03* |