This calculator provides an estimate of your 10-year risk of experiencing a myocardial infarction (heart attack). It is based on the Framingham Risk Score, a widely used tool for predicting cardiovascular disease risk. Please consult with a healthcare professional for personalized medical advice.
Your Information
years
Male
Female
mmHg
mg/dL
mg/dL
Yes
No
Yes
No
Yes
No
Your estimated 10-year risk will appear here.
Understanding Your Myocardial Infarction Risk
What is Myocardial Infarction?
Myocardial infarction, commonly known as a heart attack, occurs when blood flow to a part of the heart muscle is severely reduced or blocked. This blockage is usually caused by a buildup of plaque in the coronary arteries. Without oxygen-rich blood, heart muscle begins to die.
The Framingham Risk Score
The Framingham Risk Score is a clinical tool developed by researchers at the Framingham Heart Study. It estimates the probability of an individual developing cardiovascular disease (including heart attack) over the next 10 years. It uses several key risk factors to calculate this probability.
How the Calculator Works (Framingham General Cardiovascular Disease Risk Score – 10-Year Risk)
The calculator uses simplified formulas based on the Framingham Risk Score for predicting the 10-year risk of a hard cardiovascular event (non-fatal myocardial infarction, coronary insufficiency or coronary heart disease death).
The calculation involves assigning points based on age, gender, cholesterol levels, blood pressure, smoking status, and diabetes status. These points are then used to determine a percentage risk. For simplicity and user-friendliness, this calculator approximates the risk by summing weighted contributions rather than performing the exact point system calculation which can be complex to implement directly in basic JavaScript without lookup tables for specific age/gender groups. The core factors considered are:
Age: Older age increases risk.
Gender: Historically, men have had a higher risk at younger ages than women, though this gap narrows after menopause.
Total Cholesterol: Higher levels generally increase risk.
Systolic Blood Pressure: Higher levels increase risk. Treatment for high blood pressure also contributes to risk assessment.
Smoking Status: Current smokers have a significantly higher risk.
Diabetes Status: Having diabetes is a major risk factor for cardiovascular disease.
Interpreting Your Results:
The result is an estimated percentage chance of having a heart attack within the next 10 years. It's important to understand:
Low Risk: Typically considered less than 10%.
Intermediate Risk: Typically between 10% and 20%.
High Risk: Typically 20% or greater.
This is an estimation tool. Your actual risk may vary. Factors not included in this calculator, such as family history, diet, physical activity, stress levels, and other medical conditions, also play a significant role in cardiovascular health.
Use Cases:
Awareness: To understand your personal risk factors for heart disease.
Motivation: To encourage lifestyle changes or adherence to medical treatments.
Discussion with Doctor: To facilitate conversations with your healthcare provider about preventative strategies.
Disclaimer:
This calculator is for informational purposes only and does not constitute medical advice. It is not a substitute for professional medical diagnosis or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.
function calculateRisk() {
var age = parseFloat(document.getElementById("age").value);
var gender = document.getElementById("gender").value;
var systolicBP = parseFloat(document.getElementById("systolicBP").value);
var cholesterol = parseFloat(document.getElementById("cholesterol").value);
var hdlCholesterol = parseFloat(document.getElementById("hdlCholesterol").value);
var smoking = document.getElementById("smoking").value;
var diabetes = document.getElementById("diabetes").value;
var treatment = document.getElementById("treatment").value;
var resultElement = document.getElementById("result");
resultElement.style.backgroundColor = "#d4edda"; // Reset to default color
// — Input Validation —
if (isNaN(age) || age 120 ||
isNaN(systolicBP) || systolicBP 300 ||
isNaN(cholesterol) || cholesterol 600 ||
isNaN(hdlCholesterol) || hdlCholesterol 120) {
resultElement.textContent = "Please enter valid numbers for all fields.";
resultElement.style.backgroundColor = "#f8d7da"; // Error color
return;
}
// — Simplified Framingham Point System Approximation —
// These are approximations and do not represent the exact Framingham point calculations.
// The actual Framingham score involves specific tables for age/gender and calculation of
// log(risk) based on points. This is a simplified weighted sum for demonstration.
var points = 0;
// Age Points (Simplified ranges)
if (gender === 'male') {
if (age >= 30 && age = 35 && age = 40 && age = 45 && age = 50 && age = 55 && age = 60 && age = 65 && age = 70 && age = 75) points += 38;
} else { // Female
if (age >= 30 && age = 35 && age = 40 && age = 45 && age = 50 && age = 55 && age = 60 && age = 65 && age = 70 && age = 75) points += 19;
}
// Cholesterol Points (Total Cholesterol)
if (gender === 'male') {
if (cholesterol = 160 && cholesterol = 200 && cholesterol = 240 && cholesterol = 280) points += 13;
} else { // Female
if (cholesterol = 160 && cholesterol = 200 && cholesterol = 240 && cholesterol = 280) points += 15;
}
// HDL Cholesterol Points (Subtract for higher HDL)
if (gender === 'male') {
if (hdlCholesterol >= 60) points -= 1;
else if (hdlCholesterol >= 50 && hdlCholesterol = 40 && hdlCholesterol < 50) points += 1;
else if (hdlCholesterol = 60) points -= 1;
else if (hdlCholesterol >= 50 && hdlCholesterol = 45 && hdlCholesterol < 50) points += 1;
else if (hdlCholesterol < 45) points += 2;
}
// Systolic Blood Pressure Points (If not on treatment)
if (treatment === 'no') {
if (systolicBP = 120 && systolicBP = 130 && systolicBP = 140 && systolicBP = 160) points += 4;
} else { // On treatment
if (systolicBP = 120 && systolicBP = 130 && systolicBP = 140 && systolicBP = 160) points += 5;
}
// Smoking Points
if (smoking === 'yes') {
points += 8; // For males, this is 8; for females, it's 5. Simplified to 8 for both.
// A more precise implementation would have gender-specific smoking points.
}
// Diabetes Points
if (diabetes === 'yes') {
if (gender === 'male') {
points += 7;
} else { // Female
points += 9;
}
}
// — Convert Points to 10-Year Risk Percentage —
// These are lookup values based on total points and gender from Framingham tables.
// This is a significant simplification. A true calculator would use a formula like:
// Risk = 1 – exp(exp(log(risk_factor_points)) * exp(risk_factor_points))
// Or more directly, by interpolating from tables.
// For this example, we'll use a very rough lookup.
var riskPercentage = 0;
if (gender === 'male') {
if (points = 29) riskPercentage = 40; // Capped for simplification
} else { // Female
if (points = 31) riskPercentage = 35; // Capped for simplification
}
resultElement.textContent = "Your estimated 10-year risk: " + riskPercentage + "%";
if (riskPercentage >= 20) {
resultElement.style.backgroundColor = "#f8d7da"; // Light red for high risk
} else if (riskPercentage >= 10) {
resultElement.style.backgroundColor = "#fff3cd"; // Light yellow for intermediate risk
} else {
resultElement.style.backgroundColor = "#d4edda"; // Light green for low risk
}
}