Calcium score (Agatston) - risk level for significant coronary artery disease (CAD)

Coronary calcium score is an independent predictor of risk of significant coronary artery disease. It may refine overall risk of coronary artery disease estimated with conventional risk factors. It is based on CT examination and calculation of the Agatston score from the images.

Calcium score Risk of significant CAD
0 very low
≤10 low
≤100 moderate
≤400 moderately high
>400 high

  Youssef et al. used a different description for calcium score intervals:

Calcium score Risk RR
<100 average risk 1.9
<400 moderate risk 4.3
<1000 high risk 7.2
≥1000 very high risk 10.8


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