Estimate your 10-year coronary heart disease risk using the validated MESA equations, with and without CAC. Includes Coronary Age.
The MESA Risk Score was developed from the Multi-Ethnic Study of Atherosclerosis, a prospective cohort of 6,814 participants aged 45-84 who were free of clinical heart disease at baseline and followed for over 10 years. It predicts 10-year risk of coronary heart disease events including myocardial infarction, cardiac arrest, angina requiring revascularization, and CHD death.
The score incorporates age, sex, race/ethnicity, total cholesterol, HDL cholesterol, systolic blood pressure, use of blood pressure medication, lipid-lowering medication, diabetes, smoking status, family history of MI, and optionally the coronary artery calcium (CAC) score.
Including CAC in the MESA Risk Score significantly improves discrimination (C-statistic 0.80 vs. 0.75 without CAC). This was externally validated in both the Heinz Nixdorf Recall Study and the Dallas Heart Study. A zero CAC score is the strongest negative risk predictor, with a diagnostic likelihood ratio of 0.41 for CHD. Patients with CAC over 300 had 10-year event rates ranging from 13% to 26% across all demographic subgroups.
Coronary Age translates your risk into a more intuitive metric: the age at which an average healthy person would have your same level of risk. This concept was derived by Blaha et al. from the MESA study and published in the Journal of the American Heart Association in 2021. If your coronary age is significantly higher than your actual age, it suggests your cardiovascular risk factors are taking a measurable toll.
The ACC/AHA prevention guidelines define risk thresholds: low risk is below 5%, borderline is 5-7.5%, intermediate is 7.5-20%, and high risk is above 20%. These thresholds help guide decisions about statin therapy, aspirin use, and the intensity of lifestyle modifications. CAC scoring is specifically recommended by the 2018 ACC/AHA guidelines for patients at borderline or intermediate risk when the treatment decision is uncertain.
The MESA CHD Risk Score (this calculator) predicts your absolute 10-year risk of a heart event by combining your CAC with traditional risk factors. The CAC Percentile Calculator compares your calcium score to others of the same age, sex, and ethnicity. Use both for a complete picture: the percentile tells you how your calcium compares to peers, while the risk score tells you your actual probability of an event.
The MESA Risk Score is a validated cardiovascular risk prediction tool developed from the Multi-Ethnic Study of Atherosclerosis, a landmark NIH-funded study of over 6,800 participants across four ethnic groups. Unlike the traditional Framingham Risk Score, the MESA model incorporates coronary artery calcium (CAC) scoring, which has been shown to significantly improve risk prediction accuracy. A 2010 study published in The Lancet demonstrated that adding CAC to traditional risk factors reclassified 23% of intermediate-risk patients into more appropriate risk categories.
The Framingham Risk Score uses age, sex, total cholesterol, HDL cholesterol, systolic blood pressure, blood pressure treatment status, smoking, and diabetes to estimate 10-year cardiovascular risk. The MESA Risk Score adds coronary artery calcium to this model, providing substantially better discrimination between patients who will and will not experience a coronary event. For patients with CAC scores of 0, the MESA model often predicts lower risk than Framingham, potentially allowing patients to avoid unnecessary statin therapy. For patients with high CAC scores, MESA predicts higher risk, prompting more aggressive prevention. The Calcium Score Calculator provides MESA-based percentile interpretation of your Agatston score.
The MESA Risk Score is most useful for adults aged 45 to 84 who have undergone a coronary artery calcium CT scan. It is particularly valuable for patients in the "intermediate risk" category (5-20% 10-year risk by traditional calculators) where the CAC score can tip the decision toward or away from statin therapy. The 2019 ACC/AHA Primary Prevention Guidelines specifically endorse CAC scoring as a decision aid for statin therapy in intermediate-risk patients. This calculator outputs both the 10-year CHD risk percentage and Coronary Age, which expresses cardiovascular risk as the age of a person with equivalent risk but zero calcium.
For a complete guide on interpreting calcium scores by age and ethnicity, read What Is a Good Calcium Score? on our blog. To look up your exact MESA percentile, use the CT Calcium Score Percentile Calculator. You can also review your blood work results including cholesterol, blood sugar, and other markers that factor into cardiovascular risk.