Table 4. Improving of the predictive capacity of the cardiovascular risk tables when including pathological ABI in the models.
| Framingham | Framingham+AP | REGICOR | REGICOR+AP | |||||
|---|---|---|---|---|---|---|---|---|
| Calibration: Akaike Index Criteria | 1919 | 1910 | 1923 | 1913 | ||||
| Discrimination: Harrell’s C | 0.68 | 0.69 | 0.67 | 0.68 | ||||
| Reclassification: NRI | 95%CI | 95%CI | ||||||
| Among cases | 0.07 | 0.01 | 0.14 | 0.10 | 0.04 | 0.17 | ||
| Among non cases | -0.03 | -0.04 | -0.02 | -0.04 | -0.04 | -0.03 | ||
| Overall | 0.04 | -0.02 | 0.11 | 0.07 | 0.00 | 0.13 | ||
| Among cases (moderate risk group) | 0.09 | 0.01 | 0.16 | 0.12 | 0.04 | 0.20 | ||
| Among non cases (moderate risk group) | -0.03 | -0.05 | -0.02 | -0.05 | -0.06 | -0.04 | ||
| Overall (moderate risk group) | 0.05 | -0.03 | 0.13 | 0.07 | -0.02 | 0.15 | ||
| Among cases (low risk group) | 0.05 | -0.05 | 0.15 | 0.07 | -0.02 | 0.17 | ||
| Among non cases (low risk group) | -0.03 | -0.04 | -0.02 | -0.03 | -0.03 | -0.02 | ||
| Overall (low risk group) | 0.02 | -0.07 | 0.12 | 0.05 | -0.05 | 0.15 | ||
ABI: ankle-brachial index; NRI: net reclassification index. Moderate risk: Framingham between 10–20%, REGICOR between 5–10%.