Table 2.
Mean utility and VAS scores for all observations
| Variable | Estimation sample (233 observations) | Validation sample (149 observations) | P-value |
|---|---|---|---|
| EQ-5D utility score, mean ± SD | 0.72±0.20 | 0.73±0.16 | 0.39 |
| VAS mobility (mm), mean ± SD | 26.8±22.4 | 26.6±20.3 | 0.91 |
| VAS self-care (mm), mean ± SD | 15.5±21.9 | 15.2±21.5 | 0.89 |
| VAS usual activity (mm), mean ± SD | 44.4±32.7 | 41.8±29.9 | 0.43 |
| VAS pain (mm), mean ± SD | 22.8±20.6 | 23.8±22.1 | 0.65 |
| VAS anxiety and depression (mm), mean ± SD | 16.3±20.6 | 18.2±21.2 | 0.39 |
| Disease stage proxy | 0.87 | ||
| Preoperative, n (%) | 97 (41.6) | 66 (44.3) | |
| Postoperative day 5, n (%) | 78 (33.5) | 47 (31.5) | |
| Postoperative day 40, n (%) | 58 (24.9) | 36 (24.2) |
Abbreviations: EQ-5D, EuroQol 5 Dimensions questionnaire; SD, standard deviation; VAS, visual analog scale; n, number.