Table 3.
Hazard Ratios and Concordance Indexes for Estimation of 1-Year Mortality
| Risk Assessment Strategy and Risk Group | No. of Patients (%) | Kaplan-Meier Estimated Mortality at 1 y, % (95% CI) | HR (95% CI) Compared With Low-Risk Group | C-Index (95% CI), Three-Category/Original |
|---|---|---|---|---|
| REVEAL 2.0 (N = 2,529) | ||||
| Low (score, ≤ 6) | 1,073 (42.4) | 1.9 (1.1-2.7) | NA | 0.73 (0.71-0.75)/0.76 (0.74-0.78) |
| Intermediate (score, 7-8) | 692 (27.4) | 6.5 (4.7-8.4) | 2.73 (2.2-3.4) | |
| High (score, ≥ 9) | 764 (30.2) | 25.8 (22.7-28.9) | 8.09 (6.6-9.9) | |
| REVEAL Lite 2 (N = 2,529) | ||||
| Low (score, ≤ 5) | 960 (38.0) | 2.9 (1.8-3.9) | NA | 0.70 (0.68-0.72)/0.73 (0.71-0.75) |
| Intermediate (score, 6-7) | 883 (34.9) | 7.1 (5.4-8.8) | 2.27 (1.8-2.8) | |
| High (score, ≥ 8) | 686 (27.1) | 25.1 (21.9-28.4) | 6.35 (5.2-7.8) | |
c-index = Harrell’s concordance statistic; HR, hazard ratio; NA = not applicable. See Table 1 legend for expansion of other abbreviation.