Table 3.
Analyses of the Harrell’s C, Net Reclassification Improvement Indices, and Integrated Discrimination Indices
| Harrell’s C | p | Category-free net reclassification (95% CI) | Net events correctly reclassified higher | Net non-events correctly reclassified lower | Integrated discrimination index (95% CI) | |
|---|---|---|---|---|---|---|
| ASVD events (n = 420) | ||||||
| Framingham risk factors | 0.629 | |||||
| Framingham risk factors + AAC severity groups | 0.632 | 0.224 | 0.086 (−0.037 to 0.209) | 14.3% | −5.7% | 0.003 (−0.001 to 0.006) |
| ASVD deaths (n = 206) | ||||||
| Framingham risk factors | 0.665 | |||||
| Framingham risk factors + AAC severity groups | 0.675 | 0.179 | 0.211 (0.060 to 0.365) | 23.9% | −2.6% | 0.009 0.002 to 0.015) |
ASVD = atherosclerotic vascular disease; AAC = abdominal aortic calcification; CVD = cardiovascular disease.
a
Compared to Framingham risk factors and treatment code.
b
p < 0.05 compared to model with Framingham general CVD risk factors.