function calculateHeartRisk() {
var age = parseFloat(document.getElementById('hr_age').value);
var sex = document.getElementById('hr_sex').value;
var totalChol = parseFloat(document.getElementById('hr_total_chol').value);
var hdl = parseFloat(document.getElementById('hr_hdl_chol').value);
var sbp = parseFloat(document.getElementById('hr_sbp').value);
var bpMeds = parseInt(document.getElementById('hr_bp_meds').value);
var smoker = parseInt(document.getElementById('hr_smoker').value);
var diabetes = parseInt(document.getElementById('hr_diabetes').value);
if (!age || !totalChol || !hdl || !sbp) {
alert("Please fill in all fields with valid numbers.");
return;
}
if (age 79) {
alert("This calculator is validated for ages 20 to 79.");
return;
}
var lnAge = Math.log(age);
var lnTotalChol = Math.log(totalChol);
var lnHdl = Math.log(hdl);
var lnSbp = Math.log(sbp);
var sbp_treat = bpMeds === 1 ? lnSbp : 0;
var sbp_untreat = bpMeds === 0 ? lnSbp : 0;
var sum = 0;
var survival = 0;
var meanSum = 0;
if (sex === "female") {
// ASCVD Female Coefficients (White)
sum = (-29.799 * lnAge) + (4.884 * Math.pow(lnAge, 2)) + (13.540 * lnTotalChol) +
(-3.114 * lnAge * lnTotalChol) + (-13.578 * lnHdl) + (3.149 * lnAge * lnHdl) +
(2.019 * sbp_treat) + (1.957 * sbp_untreat) + (7.574 * smoker) +
(-1.665 * lnAge * smoker) + (0.661 * diabetes);
survival = 0.9665;
meanSum = -29.18;
} else {
// ASCVD Male Coefficients (White)
sum = (12.344 * lnAge) + (11.853 * lnTotalChol) + (-2.664 * lnAge * lnTotalChol) +
(-7.990 * lnHdl) + (1.769 * lnAge * lnHdl) + (1.797 * sbp_treat) +
(1.764 * sbp_untreat) + (7.837 * smoker) + (-1.795 * lnAge * smoker) + (0.658 * diabetes);
survival = 0.9144;
meanSum = 61.18;
}
var risk = 1 – Math.pow(survival, Math.exp(sum – meanSum));
var finalRisk = (risk * 100).toFixed(1);
var resultBox = document.getElementById('hr_result_box');
var riskVal = document.getElementById('hr_risk_value');
var riskLevel = document.getElementById('hr_risk_level');
var riskDesc = document.getElementById('hr_risk_desc');
resultBox.style.display = "block";
riskVal.innerText = finalRisk + "%";
if (finalRisk < 5) {
resultBox.style.backgroundColor = "#e8f5e9";
riskVal.style.color = "#2e7d32";
riskLevel.innerText = "Low Risk";
riskDesc.innerText = "Maintain your healthy lifestyle with a balanced diet and regular exercise.";
} else if (finalRisk < 7.5) {
resultBox.style.backgroundColor = "#fffde7";
riskVal.style.color = "#fbc02d";
riskLevel.innerText = "Borderline Risk";
riskDesc.innerText = "Discuss risk-enhancing factors with your doctor, such as family history or high-risk conditions.";
} else if (finalRisk < 20) {
resultBox.style.backgroundColor = "#fff3e0";
riskVal.style.color = "#ef6c00";
riskLevel.innerText = "Intermediate Risk";
riskDesc.innerText = "It is recommended to consult a healthcare professional regarding potential statin therapy and lifestyle changes.";
} else {
resultBox.style.backgroundColor = "#ffebee";
riskVal.style.color = "#c62828";
riskLevel.innerText = "High Risk";
riskDesc.innerText = "Strongly consider medical intervention and aggressive lifestyle modifications as guided by your physician.";
}
}
Understanding Your 10-Year Cardiovascular Risk
The 10-year ASCVD (Atherosclerotic Cardiovascular Disease) risk estimator is a clinical tool used by healthcare providers to predict the likelihood of a person experiencing a major cardiovascular event, such as a heart attack or stroke, over the next decade.
Key Factors in Heart Health
Systolic Blood Pressure: The pressure in your arteries when your heart beats. High pressure causes wear and tear on artery walls.
Total & HDL Cholesterol: Total cholesterol measures the overall fats in your blood, while HDL (High-Density Lipoprotein) is the "good" cholesterol that helps clear plaque.
Smoking Status: Tobacco use is one of the most significant modifiable risk factors for heart disease.
Diabetes: High blood sugar levels can damage blood vessels and the nerves that control your heart.
Interpreting the Results
The percentages provided by this calculator are based on the Pooled Cohort Equations (PCE). Medical guidelines generally categorize risk as follows:
Risk Level
Percentage
Low Risk
Less than 5%
Borderline Risk
5% to 7.4%
Intermediate Risk
7.5% to 19.9%
High Risk
20% or higher
How to Lower Your Risk
Regardless of your score, heart-healthy habits can significantly impact your longevity. Consider incorporating a Mediterranean-style diet rich in whole grains and healthy fats, aiming for at least 150 minutes of moderate-intensity exercise per week, and working with a provider to manage blood pressure and cholesterol through medication if necessary.
Disclaimer: This calculator is for educational purposes only and does not constitute medical advice. Always consult with a qualified healthcare provider for diagnosis and treatment decisions.