American Heart Association Risk Calculator

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ASCVD 10-Year Risk Estimator

Male Female
White African American Other
No Yes
No Yes
No Yes
Your Estimated 10-Year ASCVD Risk:
0%

Understanding Your ASCVD Risk Score

The ASCVD (Atherosclerotic Cardiovascular Disease) risk calculator is a tool developed by the American College of Cardiology and the American Heart Association. It estimates the 10-year risk of a first hard ASCVD event, such as a heart attack or stroke. This tool is specifically designed for adults aged 40 to 79 who do not currently have heart disease.

How the Calculation Works

This calculator uses the Pooled Cohort Equations, which factor in several critical data points:

  • Age: Risk naturally increases as we get older.
  • Cholesterol: The ratio of Total Cholesterol to HDL (the "good" cholesterol) is a significant indicator of arterial health.
  • Blood Pressure: High systolic pressure puts strain on the cardiovascular system. The calculator also accounts for whether you are currently taking medication to manage it.
  • Lifestyle Factors: Smoking and diabetes significantly accelerate the buildup of plaque in the arteries.

What Your Result Means

The AHA generally classifies risk into four categories:

  • Low Risk (<5%): Maintain a healthy lifestyle with diet and exercise.
  • Borderline Risk (5% to 7.4%): Discuss your risk with a healthcare provider; they may look at "risk enhancers."
  • Intermediate Risk (7.5% to 19.9%): Statins and lifestyle changes are often recommended.
  • High Risk (≥20%): Immediate clinical intervention and aggressive risk factor management are usually necessary.

Realistic Example

Consider a 60-year-old white male with a systolic BP of 140 mmHg, total cholesterol of 210 mg/dL, HDL of 45 mg/dL, who is currently being treated for high blood pressure but does not have diabetes and does not smoke. Based on the Pooled Cohort Equations, his 10-year risk would likely fall into the "Intermediate" category, suggesting a conversation with his doctor about preventive measures.

Disclaimer: This calculator is for educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult with a qualified physician before making medical decisions.

function calculateASCVD() { var age = parseFloat(document.getElementById('age').value); var gender = document.getElementById('gender').value; var race = document.getElementById('race').value; var sbp = parseFloat(document.getElementById('systolicBP').value); var tc = parseFloat(document.getElementById('totalChol').value); var hdl = parseFloat(document.getElementById('hdlChol').value); var bpMeds = document.getElementById('onBPmeds').value === 'yes' ? 1 : 0; var diabetes = document.getElementById('diabetes').value === 'yes' ? 1 : 0; var smoker = document.getElementById('smoker').value === 'yes' ? 1 : 0; if (!age || !sbp || !tc || !hdl || age 79) { alert("Please enter all values. This calculator is valid for ages 40-79."); return; } var lnAge = Math.log(age); var lnTC = Math.log(tc); var lnHdl = Math.log(hdl); var lnSbp = Math.log(sbp); var s010, meanSum, sum; var riskPercent = 0; // Pooled Cohort Equations Coefficients if (gender === 'female') { if (race === 'african_american') { s010 = 0.9533; meanSum = 86.61; sum = (17.114 * lnAge) + (0.94 * lnTC) + (-18.92 * lnHdl) + (4.475 * lnAge * lnHdl) + (bpMeds ? 28.129 * lnSbp : 27.82 * lnSbp) + (bpMeds ? -6.087 * lnAge * lnSbp : -6.013 * lnAge * lnSbp) + (0.691 * smoker) + (0.874 * diabetes); } else { // White or Other Female s010 = 0.9665; meanSum = -29.18; sum = (-29.799 * lnAge) + (4.884 * Math.pow(lnAge, 2)) + (13.54 * lnTC) + (-3.114 * lnAge * lnTC) + (-13.578 * lnHdl) + (3.149 * lnAge * lnHdl) + (bpMeds ? 2.019 * lnSbp : 1.957 * lnSbp) + (0.661 * smoker) + (0.657 * diabetes); } } else { // Male if (race === 'african_american') { s010 = 0.8954; meanSum = 19.54; sum = (2.469 * lnAge) + (0.302 * lnTC) + (-0.307 * lnHdl) + (bpMeds ? 1.916 * lnSbp : 1.809 * lnSbp) + (0.549 * smoker) + (0.645 * diabetes); } else { // White or Other Male s010 = 0.9144; meanSum = 61.18; sum = (12.344 * lnAge) + (11.853 * lnTC) + (-2.664 * lnAge * lnTC) + (-7.99 * lnHdl) + (1.769 * lnAge * lnHdl) + (bpMeds ? 1.797 * lnSbp : 1.764 * lnSbp) + (0.783 * smoker) + (0.658 * diabetes); } } var exponent = sum – meanSum; riskPercent = (1 – Math.pow(s010, Math.exp(exponent))) * 100; // Output formatting var resultBox = document.getElementById('aha-result-box'); var scoreDisplay = document.getElementById('risk-score'); var catDisplay = document.getElementById('risk-category'); resultBox.style.display = 'block'; scoreDisplay.innerText = riskPercent.toFixed(1) + "%"; resultBox.className = "aha-result"; // Reset if (riskPercent < 5) { resultBox.classList.add('risk-low'); catDisplay.innerText = "Category: Low Risk"; } else if (riskPercent < 7.5) { resultBox.classList.add('risk-borderline'); catDisplay.innerText = "Category: Borderline Risk"; } else if (riskPercent < 20) { resultBox.classList.add('risk-intermediate'); catDisplay.innerText = "Category: Intermediate Risk"; } else { resultBox.classList.add('risk-high'); catDisplay.innerText = "Category: High Risk"; } }

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