Interplay of Coronary Artery Calcium and Risk Factors for Predicting CVD/CHD Mortality: The CAC Consortium

Drawing on the large CAC Consortium, this study examined how coronary calcium and traditional risk factors interact across the full spectrum of baseline risk to predict death.

In over 66,000 people, high calcium scores (≥400) were strongly associated with increased coronary and cardiovascular mortality. But the most clinically useful finding was the power of zero: a calcium score of zero identified low risk regardless of how many traditional risk factors a person carried. The artery’s actual state overrode the risk-factor checklist.

This “power of zero” concept — that absence of calcium reclassifies even risk-factor-heavy patients downward — is one of calcium scoring’s most practical contributions, allowing clinicians to safely de-escalate treatment intensity in some, while flagging genuine danger in those with high scores.

We rate the evidence strong. It is a very large, multicenter cohort that solidifies calcium scoring’s role in mortality prediction and the de-risking value of a zero score, bounded by the usual observational caveats.