Estimate your 10-year risk of experiencing a cardiovascular event.
Male
Female
Yes
No
Yes
No
Your estimated 10-year risk will appear here.
Understanding Coronary Risk and the Calculator
Cardiovascular disease (CVD), including heart attack and stroke, remains a leading cause of mortality worldwide. Understanding your personal risk of developing these conditions is a crucial first step towards prevention. A coronary risk calculator is a tool designed to estimate the likelihood of experiencing a cardiovascular event (like a heart attack or stroke) within a specific timeframe, typically 10 years.
This calculator provides an estimate based on several key risk factors that are widely recognized by medical professionals. It's important to remember that this is a screening tool and not a definitive diagnosis. Always consult with a healthcare provider for personalized medical advice and management plans.
Factors Used in This Calculator:
Age: The risk of cardiovascular disease increases significantly with age.
Gender: Historically, men have had a higher risk at younger ages, though the gap narrows with age.
Systolic Blood Pressure: The top number in a blood pressure reading, indicating the pressure in arteries when the heart beats. High blood pressure is a major risk factor.
Total Cholesterol: A measure of all cholesterol in the blood. Elevated levels can contribute to plaque buildup in arteries.
HDL Cholesterol: Often referred to as "good" cholesterol, higher levels are generally protective against heart disease.
Smoking Status: Tobacco use damages blood vessels and significantly increases CVD risk.
Diabetes Status: Diabetes can damage blood vessels over time, greatly increasing the risk of heart disease and stroke.
How the Calculation Works (General Principle)
This calculator uses a simplified model inspired by widely accepted risk prediction algorithms such as the Framingham Risk Score or the ASCVD Risk Estimator. These models are derived from large epidemiological studies that track populations over time to identify correlations between various risk factors and the incidence of cardiovascular events.
The underlying mathematics typically involve logistic regression or similar statistical methods. Each risk factor is assigned a 'point' value or weight, which is then combined based on specific formulas. These formulas are often adjusted for age, gender, and other factors to generate a probability score, usually expressed as a percentage. For example, a 10% risk means that for every 100 people with your profile, approximately 10 would be expected to have a cardiovascular event in the next 10 years.
Disclaimer: This calculator is for informational and educational purposes only. It does not replace professional medical advice, 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 calculateCoronaryRisk() {
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 resultTextElement = document.getElementById("resultText");
resultTextElement.style.color = "#333"; // Reset color
// Input validation
if (isNaN(age) || isNaN(systolicBP) || isNaN(cholesterol) || isNaN(hdlCholesterol) ||
age <= 0 || systolicBP <= 0 || cholesterol <= 0 || hdlCholesterol <= 0) {
resultTextElement.textContent = "Please enter valid positive numbers for all fields.";
return;
}
if (age 85) { // Typical range for many risk scores
resultTextElement.textContent = "This calculator is designed for ages 20-85. Results may be less accurate outside this range.";
// Continue calculation but warn user
}
if (hdlCholesterol > cholesterol) {
resultTextElement.textContent = "HDL Cholesterol cannot be higher than Total Cholesterol.";
return;
}
// Simplified risk score calculation (inspired by Framingham/ASCVD principles)
// This is a simplified demonstration. Actual medical calculators use complex, validated equations.
var riskScore = 0;
// Age factor
if (gender === "male") {
if (age >= 30 && age = 35 && age = 40 && age = 45 && age = 50 && age = 55 && age = 60 && age = 65 && age = 70 && age = 75 && age = 80 && age = 30 && age = 35 && age = 40 && age = 45 && age = 50 && age = 55 && age = 60 && age = 65 && age = 70 && age = 75 && age = 80 && age = 3.0 && cholesterolRatio = 4.0 && cholesterolRatio = 5.0 && cholesterolRatio = 7.0) riskScore += 3.25;
} else { // Female
if (cholesterolRatio >= 3.0 && cholesterolRatio = 4.0 && cholesterolRatio = 5.0 && cholesterolRatio = 7.0) riskScore += 3.51;
}
// Systolic Blood Pressure factor
var bpMedicated = false; // Assume not medicated for simplicity; real calculators ask this
if (!bpMedicated) {
if (systolicBP >= 120 && systolicBP = 130 && systolicBP = 140 && systolicBP = 160) {
if (gender === "male") riskScore += 2.02; else riskScore += 2.51;
}
}
// Smoking factor
if (smoking === "yes") {
if (gender === "male") riskScore += 2.38; else riskScore += 1.99;
}
// Diabetes factor
if (diabetes === "yes") {
if (gender === "male") riskScore += 1.04; else riskScore += 1.58;
}
// Final Risk Calculation (Simplified exponentiation based on total score)
// This part is a highly simplified approximation of how points convert to probability.
var probability;
if (gender === "male") {
probability = 1 – Math.pow(0.9665, Math.exp(riskScore – 21.96)); // Example approximation
} else { // Female
probability = 1 – Math.pow(0.9575, Math.exp(riskScore – 25.18)); // Example approximation
}
var riskPercentage = Math.min(Math.max(Math.round(probability * 1000) / 10, 0), 100); // Cap at 0-100% and round to 1 decimal
var riskLevel = "";
var resultColor = "#004a99"; // Default color
if (riskPercentage = 5 && riskPercentage = 10 && riskPercentage < 20) {
riskLevel = "Intermediate Risk";
resultColor = "#fd7e14"; // Orange
} else {
riskLevel = "High Risk";
resultColor = "#dc3545"; // Red
}
resultTextElement.textContent = riskLevel + ": " + riskPercentage.toFixed(1) + "%";
resultTextElement.style.color = resultColor;
resultTextElement.style.fontWeight = "bold";
resultTextElement.style.fontSize = "1.8rem";
}