Table 5.
Results of multivariable logistic regression analysis for return to work by 2 years
| Before internal validation | After internal validation | |||||
|---|---|---|---|---|---|---|
| Regression coefficient | Odds ratio | P | Regression coefficient | Odds ratio | P | |
| Presence of metastases (yes versus no) | –0·95 | 0·39 (0·21, 0·72) | 0·003 | –0·95 | 0·39 (0·22, 0·67) | 0·001 |
| Emotional distress (yes versus no) | –0·95 | 0·39 (0·22, 0·67) | 0·001 | –0·95 | 0·39 (0·22, 0·67) | 0·001 |
| Postoperative complications (yes versus no) | –0·60 | 0·55 (0·32, 0·93) | 0·026 | –0·60 | 0·55 (0·31, 0·97) | 0·039 |
| Company size (no. of employees) | ||||||
| 10–50 versus < 10 | –0·28 | 0·76 (0·41, 1·38) | 0·362 | –0·28 | 0·76 (0·39, 1·46) | 0·403 |
| 51–250 versus < 10 | –0·60 | 0·55 (0·25, 1·18) | 0·125 | –0·60 | 0·55 (0·24, 1·27) | 0·162 |
| ≥ 251 versus < 10 | –1·31 | 0·27 (0·07, 1·12) | 0·070 | –1·31 | 0·27 (0·07, 1·11) | 0·069 |
| Trajectory of return to work (direct versus phased) | 1·26 | 3·52 (2·07, 6·00) | < 0·001 | 1·26 | 3·52 (1·52, 5·62) | 0·001 |
| Constant | 1·08 | 1·08 | ||||
| P (Hosmer and Lemeshow test) | 0·513 | |||||
| Nagelkerke's R 2 | 0·20 | 0·12 | ||||
| AUC | 0·73 (0·67, 0·79) | 0·71 (0·65, 0·77) | ||||
Values in parentheses are 95 per cent confidence intervals. AUC, area under the curve.