Coronary Artery Calcium Score, Risk Factors, and Incident Coronary Heart Disease Events

This cohort study added to the growing case that a coronary calcium score sees risk the standard factors miss — in both directions.

Following more than 10,000 people, the investigators found that a calcium score of zero marked a very low risk of coronary events, while a score of 100 or more predicted significantly higher risk even among people whose conventional risk factors looked reassuring. The calcium score was capturing real disease that the usual checklist failed to flag.

That dual capability — confirming safety in some, revealing hidden danger in others — is precisely why calcium scoring earned its place as a decision aid for patients in the uncertain middle ground of risk. It substitutes a direct look at the artery for an estimate based on averages.

We rate the evidence strong. It is a solid prospective cohort, consistent with the larger body of calcium-scoring research, even if later and larger studies (such as MESA) would provide the more definitive numbers.