Table 2.
Pre-operative characteristics of joint replacement patients
| Patient characteristic | Hip replacement | Knee replacement | ||
| NHS (N = 291) | ISTC (N = 184) | NHS (N = 323) | ISTC (N = 187) | |
| Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | |
| Age (years) | 66.2 (14.6) | 66.8 (14.1) | 66.2 (16.5) | 66.7 (12.2) |
| Duration symptoms (years) | 3.9 (5.4) | 3.7 (3.9) | 8.1 (10.1) | 8.6 (9.3) |
| Deprivation score | 22.4 (16.8) | 20.3 (13.3) | 25.2 (17.4) | 19.0 (12.6) |
| EQ-5D score | 0.31 (0.31) | 0.35 (0.32) | 0.36 (0.32) | 0.45 (0.30) |
| Disease-specific score | 44.0 (7.7) | 42.1 (8.4) | 42.3 (7.5) | 39.8 (8.0) |
| N (%) | N (%) | N (%) | N (%) | |
| Female | 157 (54.1) | 108 (58.7) | 167 (52.0) | 96 (51.6) |
| Any comorbidity | 251 (86.2) | 148 (80.4) | 280 (86.7) | 151 (80.7) |
| Previous similar surgery | 79 (27.3) | 34 (18.6) | 168 (53.3) | 78 (42.6) |
| Poor or fair health | 62 (21.5) | 27 (14.9) | 68 (21.7) | 21 (11.5) |