Estimate your 10-year risk of having a cardiovascular event (like heart attack or stroke).
Male
Female
Yes
No
Yes
No
Your 10-year cardiovascular disease risk will appear here.
Understanding Your Cardiovascular Disease Risk
Cardiovascular diseases (CVDs) are a group of disorders of the heart and blood vessels, including coronary heart disease, cerebrovascular disease, heart failure, and hypertensive heart disease. Estimating an individual's risk of developing CVD in the near future is crucial for implementing preventive strategies.
How This Calculator Works (Based on Framingham Risk Score principles)
This calculator provides an estimation of your 10-year risk of developing a major cardiovascular event. It is based on principles similar to established risk assessment tools like the Framingham Risk Score, which consider several key risk factors:
Age: Risk increases significantly with age.
Biological Sex: Historically, men have had a higher risk at younger ages, though the gap narrows later in life.
Systolic Blood Pressure: Higher systolic blood pressure (the top number) is a significant risk factor.
Total Cholesterol: Elevated total cholesterol levels contribute to increased risk.
The Math Behind the Estimate (Simplified Approach)
While precise clinical risk scores involve complex regression models and coefficients specific to different populations, the general idea is to assign points or use a weighted formula based on your input factors. The risk is then converted into a percentage chance of experiencing a CVD event within the next 10 years.
For example, a simplified calculation might look at the interaction of these factors. A common approach involves calculating a 'risk score' by summing up weighted values associated with each risk factor. This score is then translated into a probability. For instance:
Each of these components has a specific coefficient determined from large-scale epidemiological studies. The formula then typically uses a function (like the exponential function) to convert this risk score into a 10-year probability.
Example of simplified logic (illustrative, not actual coefficients):
Age: 55-59 is higher risk than 45-49.
Systolic BP: 160 mmHg is higher risk than 120 mmHg.
Cholesterol/HDL Ratio: A higher ratio increases risk.
Smoking: 'Yes' adds a significant risk multiplier.
Diabetes: 'Yes' substantially increases the baseline risk.
The calculator uses a simplified model to demonstrate the concept. For an accurate clinical assessment, please consult a healthcare professional.
Who Should Use This Calculator?
This calculator is intended for general awareness and educational purposes for adults. Individuals with a known history of heart disease, stroke, or other chronic conditions should consult their doctor directly for personalized risk assessment and management plans.
Disclaimer: This tool is an estimation and not a substitute for professional medical advice. Always consult with a qualified healthcare provider for any health concerns or before making any decisions related to your health or treatment.
function calculateCVDRisk() {
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 resultDiv = document.getElementById("result");
// — Basic Input Validation —
if (isNaN(age) || isNaN(systolicBP) || isNaN(cholesterol) || isNaN(hdlCholesterol) ||
age <= 0 || systolicBP <= 0 || cholesterol <= 0 || hdlCholesterol = 30 && age = 35 && age = 40 && age = 45 && age = 50 && age = 55 && age = 60 && age = 65 && age = 70 && age = 75 && age = 80) riskScore += 15;
// Gender Factor (Male generally higher baseline)
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) riskScore += 11;
} else { // Female
if (age >= 30 && age = 35 && age = 40 && age = 45 && age = 50 && age = 55 && age = 60 && age = 65 && age = 70 && age = 75 && age = 80) riskScore += 10;
}
// Systolic Blood Pressure Factor (Assuming treated or untreated)
var bpRisk = 0;
if (systolicBP >= 120 && systolicBP = 130 && systolicBP = 140 && systolicBP = 160) bpRisk = 3;
if (gender === "male") {
if (bpRisk === 1) riskScore += 1;
else if (bpRisk === 2) riskScore += 2;
else if (bpRisk === 3) riskScore += 3;
} else { // Female
if (bpRisk === 1) riskScore += 0;
else if (bpRisk === 2) riskScore += 1;
else if (bpRisk === 3) riskScore += 2;
}
// Cholesterol Factor (Total Cholesterol / HDL Ratio)
var cholRatio = cholesterol / hdlCholesterol;
var cholRisk = 0;
if (cholRatio 3.5 && cholRatio 4.5 && cholRatio 5.5) cholRisk = 3;
if (gender === "male") {
if (cholRisk === 1) riskScore += 1;
else if (cholRisk === 2) riskScore += 2;
else if (cholRisk === 3) riskScore += 3;
} else { // Female
if (cholRisk === 1) riskScore += 2;
else if (cholRisk === 2) riskScore += 3;
else if (cholRisk === 3) riskScore += 4;
}
// Smoking Factor
if (smoking === "yes") {
if (gender === "male") {
if (age >= 30 && age = 40 && age = 50 && age = 60 && age = 70) riskScore += 8;
} else { // Female
if (age >= 30 && age = 40 && age = 50 && age = 60 && age = 70) riskScore += 6;
}
}
// Diabetes Factor
if (diabetes === "yes") {
if (gender === "male") {
if (age >= 30 && age = 40 && age = 50 && age = 60 && age = 70) riskScore += 7;
} else { // Female
if (age >= 30 && age = 40 && age = 50 && age = 60 && age = 70) riskScore += 9;
}
}
// — Convert Risk Score to Percentage (Illustrative Lookup Table/Formula) —
// This part is highly dependent on the specific scoring system.
// Using a simplified percentage mapping for demonstration.
var tenYearRiskPercent = 0;
// This is a conceptual mapping and does not represent precise clinical coefficients.
// It aims to show that higher scores lead to higher percentages.
if (riskScore = 5 && riskScore = 10 && riskScore = 15 && riskScore = 20 && riskScore = 25 && riskScore = 30 && riskScore = 35) tenYearRiskPercent = 40; // Capped for simplicity
// Display the result
resultDiv.innerHTML = "Your estimated 10-year risk of cardiovascular disease is: " + tenYearRiskPercent + "%";
}