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. 2020 Mar 3;15(1):22. doi: 10.5334/gh.766

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 CAC100
Presence of significant CAD 0 4 100% 77.3% 19.0% 100%
Absence of significant CAD 58 17
CAC < 400 CAC400
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 CAC100
Presence of significant CAD 2 13 86.7% 65.2% 61.9% 88.2%
Absence of significant CAD 15 8
CAC < 400 CAC400
Presence of significant CAD 6 9 60.0% 91.3% 81.8% 77.8%
Absence of significant CAD 21 2