This calculator provides an ESTIMATE of your risk. Consult a healthcare professional for accurate medical advice.
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Your estimated risk will appear here.
Understanding Your Heart Attack Risk
Cardiovascular diseases, including heart attacks, remain leading causes of mortality worldwide. Understanding your individual risk factors is a crucial step in prevention and maintaining long-term heart health. This calculator is designed to provide an estimated 10-year risk of experiencing a heart attack based on several key health indicators. It is important to note that this is a simplified model and should not replace professional medical advice.
Factors Used in the Calculation:
Age: The risk of heart attack increases significantly with age.
Sex: Biological sex can influence cardiovascular risk due to hormonal and physiological differences.
Total Cholesterol: Higher levels of total cholesterol, particularly LDL ("bad") cholesterol, contribute to plaque buildup in arteries.
HDL Cholesterol: HDL ("good") cholesterol helps remove LDL cholesterol from the arteries, thus offering a protective effect. Lower levels are associated with higher risk.
Systolic Blood Pressure (SBP): The top number in a blood pressure reading, it indicates the pressure in your arteries when your heart beats. High SBP (hypertension) damages artery walls.
Blood Pressure Treatment: Whether you are taking medication for high blood pressure indicates the severity of this condition and its management.
Smoking Status: Smoking is a major risk factor, damaging blood vessels, increasing blood pressure, and reducing oxygen in the blood.
Diabetes: Diabetes significantly increases the risk of heart disease due to its detrimental effects on blood vessels and cholesterol levels.
How the Risk is Estimated (Simplified Framingham Risk Score Logic):
This calculator employs a simplified approach inspired by established cardiovascular risk assessment models like the Framingham Risk Score. These models use a point-based system where different values for each risk factor are assigned points. The total points are then converted into a percentage probability of experiencing a cardiovascular event (like a heart attack) within a specified timeframe (typically 10 years).
The exact formula is complex and involves specific coefficients for each variable, often adjusted for sex. A general idea of the calculation involves:
Assigning points based on the input values for age, cholesterol, blood pressure, etc.
Summing these points.
Using a formula (often exponential) to convert the total points into a 10-year risk percentage.
For example:
Higher age generally adds more points.
Higher total cholesterol and lower HDL cholesterol add points.
Elevated systolic blood pressure and being on medication add points.
Smoking and having diabetes add significant points.
The calculator translates the sum of these weighted risk factors into a likelihood. For instance, a result of 15% means there is an estimated 15 out of 100 chance of having a heart attack within the next 10 years, given the inputs provided.
Use Cases and Importance:
This calculator is a tool for:
Awareness: To help individuals understand their potential risk factors.
Motivation: To encourage lifestyle changes such as quitting smoking, improving diet, increasing exercise, and managing blood pressure and diabetes.
Informed Discussion: To facilitate conversations with healthcare providers about personalized prevention strategies.
Disclaimer: This calculator is for informational purposes only and does not constitute medical advice. The results are estimates based on algorithms and do not account for all possible risk factors or individual health nuances. Always consult with a qualified healthcare professional for diagnosis, treatment, and personalized risk assessment.
function calculateRisk() {
var age = parseFloat(document.getElementById("age").value);
var sex = parseFloat(document.getElementById("sex").value);
var cholesterol = parseFloat(document.getElementById("cholesterol").value);
var hdl = parseFloat(document.getElementById("hdl").value);
var sbp = parseFloat(document.getElementById("sbp").value);
var bpTreatment = parseFloat(document.getElementById("bpTreatment").value);
var smoking = parseFloat(document.getElementById("smoking").value);
var diabetes = parseFloat(document.getElementById("diabetes").value);
var resultDiv = document.getElementById("result");
// Input validation
if (isNaN(age) || age <= 0 ||
isNaN(cholesterol) || cholesterol < 0 ||
isNaN(hdl) || hdl < 0 ||
isNaN(sbp) || sbp = 30 && age = 35 && age = 40 && age = 45 && age = 50 && age = 55 && age = 60 && age = 65 && age = 70) agePoints = 14;
} else { // Female coefficients
if (age >= 30 && age = 35 && age = 40 && age = 45 && age = 50 && age = 55 && age = 60 && age = 65 && age = 70) agePoints = 13;
}
var cholesterolPoints = 0;
if (sex === 1) { // Male
if (cholesterol = 160 && cholesterol = 200 && cholesterol = 240 && cholesterol = 280) cholesterolPoints = 11;
} else { // Female
if (cholesterol = 160 && cholesterol = 200 && cholesterol = 240 && cholesterol = 280) cholesterolPoints = 9;
}
var hdlPoints = 0;
if (sex === 1) { // Male
if (hdl >= 60) hdlPoints = -1;
else if (hdl >= 50 && hdl = 40 && hdl <= 49) hdlPoints = 1;
else if (hdl = 60) hdlPoints = -1;
else if (hdl >= 50 && hdl = 40 && hdl <= 49) hdlPoints = 1;
else if (hdl < 40) hdlPoints = 2;
}
var sbpPoints = 0;
if (bpTreatment === 1) { // On BP medication
if (sbp = 120 && sbp = 130 && sbp = 140 && sbp = 160) sbpPoints = 18;
} else { // Not on BP medication
if (sbp = 120 && sbp = 130 && sbp = 140 && sbp = 160) sbpPoints = 4;
}
var smokingPoints = smoking * 8; // Add 8 points if smoker
var diabetesPoints = diabetes * 5; // Add 5 points if diabetic
var totalPoints = agePoints + cholesterolPoints + hdlPoints + sbpPoints + smokingPoints + diabetesPoints;
var riskPercentage = 0;
if (sex === 1) { // Male risk calculation (simplified exponential function)
riskPercentage = 1 – Math.pow(0.8965, Math.exp(totalPoints – 70.671));
} else { // Female risk calculation (simplified exponential function)
riskPercentage = 1 – Math.pow(0.9539, Math.exp(totalPoints – 64.386));
}
// Ensure risk percentage is within reasonable bounds (0-100)
riskPercentage = Math.max(0, Math.min(1, riskPercentage));
var finalRisk = (riskPercentage * 100).toFixed(2);
resultDiv.innerHTML = "Your estimated 10-year risk of heart attack is: " + finalRisk + "%";
}