Table 3. Multivariate survival analysis for one-year mortality in the derivation and validation cohorts by risk stratification groups.
| Derivation cohort | Validation cohort | |||||
|---|---|---|---|---|---|---|
| Variables | Dead/exposed | HR (95% CI) | p-value | Dead/exposed | HR (95% CI) | p-value |
| One-year CAPSI* | - | 1.24 (1.19, 1.28) | <0.001 | 1.21 (1.17, 1.26) | <0.001 | |
| One-year CAPSI | ||||||
| 0–3 | 24/717 (3.35%) | Reference | 29/689 (4.21%) | Reference | ||
| 4–5 | 19/184 (10.33%) | 3.19 (1.75, 5.83) | 0.0002 | 21/168 (12.5%) | 3.03 (1.73, 5.32) | <0.001 |
| >5 | 86/303 (28.38%) | 9.91 (6.30, 15.59) | <0.001 | 69/276 (25%) | 5.95 (3.86, 9.19) | <0.001 |
| C-index (s.e) | 0.72 (0.021) | 0.70 (0.023) | ||||
| GND test | 0.98 | 0.93 | ||||
HR: hazard ratio; CI: confidence interval. C-index: concordance index with standard error for the one-year CAPSI as categorical variable; GND test: Greenwood-Nam-D'Agostino calibration test for the one-year CAPSI as categorical variable.
*Hazard risk of each increase in one unit in the one-year CAPSI.