Table 3.
Interpretation of Duke Treadmill Score with Calcium Score.
| Sensitivity | Specificity | Positive Predictive Value | Negative Predictive Value | |||
|---|---|---|---|---|---|---|
| Low risk Duke Treadmill Score | ||||||
| CAC < 100 | CAC ≥ 100 | |||||
| Presence of significant CAD | 0 | 4 | 100% | 77.3% | 19.0% | 100% |
| Absence of significant CAD | 58 | 17 | ||||
| CAC < 400 | CAC ≥ 400 | |||||
| Presence of significant CAD | 0 | 4 | 100% | 96% | 57.1% | 100.0% |
| Absence of significant CAD | 72 | 3 | ||||
| Intermediate to High risk Duke Treadmill Score | ||||||
| CAC < 100 | CAC ≥ 100 | |||||
| Presence of significant CAD | 2 | 13 | 86.7% | 65.2% | 61.9% | 88.2% |
| Absence of significant CAD | 15 | 8 | ||||
| CAC < 400 | CAC ≥ 400 | |||||
| Presence of significant CAD | 6 | 9 | 60.0% | 91.3% | 81.8% | 77.8% |
| Absence of significant CAD | 21 | 2 | ||||