Coronary Artery Calcium Score and Coronary Heart Disease Events in a Large Cohort of Asymptomatic Men and Women

This prospective cohort followed over 10,700 asymptomatic adults from the Cooper Clinic to examine whether coronary artery calcium scoring predicted coronary heart disease events — with particular attention to whether the prediction extended to individuals with no conventional risk factors at all.

Higher CAC scores were associated with significantly elevated CHD event rates across both sexes and all age groups. The finding that held most significance: even individuals with zero traditional cardiovascular risk factors experienced substantially more coronary events when their calcium score was elevated. The reverse was equally instructive — those with a zero calcium score had event rates approaching zero over the follow-up period.

The practical message is that CAC imaging directly visualizes the disease process, not merely its risk factors. Risk factor models estimate probability based on population averages; calcium scoring measures what has actually accumulated in a specific person’s arteries. A 55-year-old with optimal blood pressure, cholesterol, and no family history can still carry significant subclinical atherosclerosis — and only the calcium scan will find it.

We rate the evidence strong. A large, carefully conducted prospective study reinforcing the superiority of direct coronary disease imaging over risk factor modeling for identifying individuals at genuinely elevated coronary risk.