How your 10-year risk is calculated
The number our home calculator shows you is not a guess. It is the output of the 2013 ACC/AHA Pooled Cohort Equations (PCE), an older risk model. This page explains the model, its coefficients, and its limits. Model guidance checked: September 10, 2026.
PCE and the 2026 guideline
The 2026 ACC/AHA dyslipidemia guideline recommends PREVENT-ASCVD instead of PCE for primary-prevention risk assessment to guide lipid-lowering therapy. This site still implements PCE for educational use. PCE and PREVENT estimates and treatment thresholds are not interchangeable. For current assessment, use the AHA PREVENT calculator with your clinician; do not start or stop medication based on this site.
The equation
For each user we compute a linear combination of log-transformed risk factors:
+ β₅·ln(HDL) + β₆·ln(age)·ln(HDL)
+ β_bp·ln(SBP) + β_smoker·smoker + β_dm·diabetes
10-year risk is then:
The coefficients (β), the baseline survival probability (S₀), and the mean cohort sum (meanSum) come from four separate sets — one for each combination of sex (male, female) and race (White or Other, African American). Coefficients are as published in the 2013 guideline. We do not modify them.
Who the equation applies to
- Adults 40 to 79 years old.
- No prior cardiovascular event — this is a primary-prevention model.
- Race is treated as either White or Other or African American. The equation was not derived on other racial groups. If you fall outside these two, the guideline suggests using the White coefficients while noting the estimate's additional uncertainty.
- Not for people with existing coronary disease, familial hypercholesterolemia, or under lipid-lowering therapy — those situations need a different clinical framework.
What our calculator adds
Alongside the 10-year risk percentage, we report two derived numbers:
- Heart age. The age at which a same-sex, same-race person with optimal risk factors (TC 170, HDL 50, SBP 110, no smoking, no diabetes, no BP treatment) would carry the closest 10-year risk within ages 40–79. This is a model comparison, not a measurement of biological age. Values at 40 or 79 may reflect the search boundary rather than an exact risk match.
- Optimal reference profile. The 10-year risk of a same-sex, same-race person your age with the optimal profile above. This is not a measured population average.
Known limitations
- The Pooled Cohort Equations tend to over-estimate risk in some contemporary populations, particularly at the borderline threshold. This is one reason clinicians use the score to open a conversation, not to make a unilateral treatment decision.
- The model does not incorporate family history, LDL/apoB, Lp(a), coronary calcium score, kidney function, or inflammatory markers — all of which are increasingly used alongside ASCVD in modern practice.
- The AHA PREVENT equations are recommended in the 2026 dyslipidemia guideline. Our separate PREVENT calculator implements the base model; the home calculator's displayed percentage remains a PCE estimate.
Primary sources
- Goff DC Jr, Lloyd-Jones DM, Bennett G, et al. 2013 ACC/AHA Guideline on the Assessment of Cardiovascular Risk. Circulation. 2014;129(25 Suppl 2):S49–S73.
- Arnett DK, Blumenthal RS, Albert MA, et al. 2019 ACC/AHA Guideline on the Primary Prevention of Cardiovascular Disease. Circulation. 2019;140(11):e596–e646.
- Khan SS, Matsushita K, Sang Y, et al. Development and Validation of the American Heart Association's PREVENT Equations. Circulation. 2024;149(6):430–449.