Performance of the categorical methods of risk assessment
| Canadian: 10 year CHD risk > 30% | Canadian: 10 year CHD risk > 15% |
Framingham categorical: 10 year CHD risk > 27% |
Framingham categorical: 10 year CHD risk > 15% | |
| True positives | 2 | 255 | 67 | 244 |
| False positives | 0 | 33 | 14 | 24 |
| True negatives | 629 | 389 | 577 | 371 |
| False negatives | 60 | 14 | 33 | 52 |
| Sensitivity (%) (95% CI) | 3.3 (0.4 to 11.7) | 94.8 (91.3 to 97.2) | 67.0 (53.7 to 77.3) | 82.4 (77.0 to 86.9) |
| Specificity (%) (95% CI) | 100 (99.4 to 100) | 92.2 (89.0 to 94.6) | 97.6 (96.0 to 98.7) | 93.9 (91.0 to 96.1) |
| Positive predictive value (%) (95% CI) | 100 (0 to 100) | 88.5 (83.9 to 92.1) | 82.7 (71.0 to 90.6) | 91.0 (86.7 to 94.3) |
| Negative predictive value (%) (95% CI) | 91.3 (88.8 to 93.4) | 96.5 (94.2 to 98.1) | 94.6 (92.4 to 96.3) | 87.7 (83.9 to 90.8) |