Medical AILegacy ASCVD 10-year cardiovascular risk calculator
The 2013 ACC/AHA Pooled Cohort Equations estimate the 10-year probability of a first hard atherosclerotic cardiovascular event (nonfatal MI, coronary death, or fatal/nonfatal stroke) in adults aged 40 to 79 without known ASCVD. This is a legacy equation: current AHA materials position PREVENT as the race-free tool for contemporary primary-prevention risk estimation.
How to measure each input
- Age
- Use age in years. The equations are validated for 40 to 79; outside this window the estimate is not reliable and this tool does not return a value.
- Cholesterol
- Enter total and HDL cholesterol in mg/dL (to convert mmol/L, multiply by 38.67). A non-fasting sample is acceptable for total and HDL.
- Systolic blood pressure
- Use a representative current systolic value. Tick the treatment box if the patient is on any antihypertensive, which selects the treated-SBP coefficients.
- Smoking
- Counts current smoking only. The model does not grade former smoking or pack-years, so a recent quitter is scored as a non-smoker here.
- Race
- The original equations offer only White (used also for all non-Black groups) and African American coefficient sets, a recognised limitation discussed below.
Interpretation
| Band | Meaning |
|---|---|
| < 5%, low risk | Low 10-year ASCVD risk under the legacy Pooled Cohort Equations. For current primary-prevention decisions, use contemporary guideline-directed risk assessment such as PREVENT and incorporate risk-enhancing factors. |
| 5 to < 7.5%, borderline risk | Borderline risk under the legacy Pooled Cohort Equations. Current decisions should be reconciled with PREVENT-based risk assessment, risk-enhancing factors, and clinician-patient discussion. |
| 7.5 to < 20%, intermediate risk | Intermediate risk under the legacy Pooled Cohort Equations. Do not treat this number as the current standalone decision rule; use current guideline risk assessment and consider coronary artery calcium when the decision is uncertain. |
| >= 20%, high risk | High risk under the legacy Pooled Cohort Equations. Confirm with current guideline-directed risk assessment and manage LDL cholesterol and other risk factors accordingly. |
Pitfalls, exclusions and caveats
- This is a legacy calculator. Current AHA primary-prevention risk estimation has moved toward race-free PREVENT equations; do not present PCE as the current preferred tool.
- This estimate must be validated before clinical use. The coefficients here reproduce the published Goff 2013 worked examples, but any deployment should be re-checked against a reference implementation and the original Table A.
- The Pooled Cohort Equations were derived from older, predominantly White and Black US cohorts and can substantially over- or under-estimate risk in other populations, including South Asian, East Asian, Hispanic, and contemporary cohorts.
- Only two race categories exist in the model. Forcing every non-Black patient into the White set is a known source of error; newer tools such as the 2023 AHA PREVENT equations remove race.
- Use it only for primary prevention in adults without established ASCVD, and not in those already on a statin, with LDL >= 190 mg/dL, or with familial hypercholesterolaemia, where treatment is indicated regardless of score.
- Risk-enhancing factors (family history, high-sensitivity CRP, Lp(a), chronic kidney disease, inflammatory conditions, and coronary artery calcium) are not in the equation and should inform borderline and intermediate decisions.
10-year risk = 1 - S0^exp(sum of (coefficient x ln value) - group mean), using sex- and race-specific coefficients for ln age, ln total cholesterol, ln HDL, ln systolic BP (treated or untreated), smoking, and diabetes, plus age-interaction terms. S0 is the group baseline survival.The Pooled Cohort Equations were developed for the 2013 ACC/AHA cardiovascular risk guideline (Goff et al.). This implementation is an educational legacy tool and is not affiliated with the ACC, AHA, or the original authors. The equations have documented limitations across populations; current AHA materials position race-free PREVENT equations for contemporary primary-prevention risk estimation.
Frequently asked
What ASCVD risk means a statin should be discussed?
Historically, PCE thresholds of 7.5% and 20% informed statin intensity discussions. Current practice should use contemporary guideline-directed risk assessment, including PREVENT where applicable, plus risk-enhancing factors and patient preference.
Why does the calculator only offer White and African American?
The 2013 Pooled Cohort Equations were derived with only those two race-specific coefficient sets, and the White set is applied to all other groups. This is a recognised limitation; the 2023 AHA PREVENT equations were developed partly to remove race from the estimate.
Can I use this if the patient already has heart disease?
No. The equations estimate the risk of a first event in adults without established atherosclerotic cardiovascular disease. Patients with known ASCVD, LDL >= 190 mg/dL, or familial hypercholesterolaemia are treated on their own indications, not on this score.
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