Table 2a. Model performance statistics for the model with current/non-smoker measure of smoking (model 1) and improvement in prediction due to including pack-years in model 3.
| Statistic | Value | Degrees of freedom | P | |
|---|---|---|---|---|
| Hosmer Lemeshow | 4.6310 | 9 | 0.8652 | |
| Modified HL | 4.3962 | 9 | 0.8835 | |
| Likeliood ratio | 312.0313 | 8 | <0.0001 | |
| C (SE) | 0.8041 (0.0109) | |||
| 95% CI | 0.7827–0.8255 | |||
| Likelihood ratio | ||||
| Model 3 vs. Model 1 | 12.9552 | 3 | 0.0047 | |
| Model 3 vs. Model 2 | 9.1547 | 1 | 0.0025 |
| Difference between two correlated C |
Estimate (SE) | 95% CI | x2 | P |
|---|---|---|---|---|
| Model 3 vs. Model 1 | 0.0023 (0.0022) | −0.0020, 0.0066 | 1.0678 | 0.3014 |
| Model 3 vs. Model 2 | 0.0018 (0.0018) | −0.0017, 0.0053 | 1.0086 | 0.3152 |
| Estimate | 95% CI | Z | P | |
|---|---|---|---|---|
| NRI | ||||
| Model 3 vs. Model 1 | 0.0033 | 0.0012, 0.0054 | 3.0628 | 0.0022 |
| Model 3 vs. Model 2 | 0.0160 | −0.0034, 0.0354 | 1.6160 | 0.1061 |
| IDI | ||||
| Model 3 vs. Model 1 | 0.0332 | 0.0029, 0.0636 | 2.1406 | 0.0323 |
| Model 3 vs. Model 2 | 0.0021 | 0.0006, 0.0037 | 2.7307 | 0.0063 |