10-Year Cardiac Risk Calculator
:root {
–primary-blue: #004a99;
–success-green: #28a745;
–light-background: #f8f9fa;
–dark-text: #333;
–border-color: #ccc;
}
body {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
line-height: 1.6;
color: var(–dark-text);
background-color: var(–light-background);
margin: 0;
padding: 20px;
}
.calculator-container {
max-width: 800px;
margin: 20px auto;
background-color: #fff;
padding: 30px;
border-radius: 8px;
box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
display: flex;
flex-wrap: wrap;
gap: 30px;
}
.calculator-title {
width: 100%;
text-align: center;
color: var(–primary-blue);
margin-bottom: 30px;
font-size: 2em;
border-bottom: 2px solid var(–border-color);
padding-bottom: 15px;
}
.input-section, .result-section {
flex: 1;
min-width: 280px;
}
.input-section h2, .result-section h2 {
color: var(–primary-blue);
margin-bottom: 20px;
font-size: 1.5em;
border-bottom: 1px solid var(–border-color);
padding-bottom: 10px;
}
.input-group {
margin-bottom: 18px;
display: flex;
flex-direction: column;
}
.input-group label {
display: block;
margin-bottom: 8px;
font-weight: bold;
color: var(–dark-text);
}
.input-group input[type="number"],
.input-group select {
width: 100%;
padding: 10px;
border: 1px solid var(–border-color);
border-radius: 5px;
box-sizing: border-box;
font-size: 1em;
}
.input-group input[type="number"]:focus,
.input-group select:focus {
outline: none;
border-color: var(–primary-blue);
box-shadow: 0 0 5px rgba(0, 74, 153, 0.5);
}
.calculate-button {
width: 100%;
padding: 12px 20px;
background-color: var(–primary-blue);
color: white;
border: none;
border-radius: 5px;
font-size: 1.1em;
cursor: pointer;
transition: background-color 0.3s ease;
margin-top: 15px;
}
.calculate-button:hover {
background-color: #003366;
}
.result-display {
margin-top: 20px;
padding: 20px;
background-color: var(–success-green);
color: white;
text-align: center;
border-radius: 5px;
font-size: 1.4em;
font-weight: bold;
box-shadow: 0 2px 10px rgba(40, 167, 69, 0.4);
}
.result-display span {
font-size: 1.2em;
display: block;
margin-top: 5px;
}
.explanation {
margin-top: 40px;
padding: 25px;
background-color: #eef7ff;
border-left: 5px solid var(–primary-blue);
border-radius: 5px;
}
.explanation h2 {
color: var(–primary-blue);
margin-bottom: 15px;
font-size: 1.8em;
border-bottom: none;
}
.explanation p, .explanation ul {
margin-bottom: 15px;
}
.explanation strong {
color: var(–primary-blue);
}
/* Responsive adjustments */
@media (max-width: 768px) {
.calculator-container {
flex-direction: column;
padding: 20px;
}
.input-section, .result-section {
min-width: 100%;
}
.calculator-title {
font-size: 1.8em;
}
.explanation {
margin-top: 30px;
}
}
10-Year Cardiac Risk Calculator
Your 10-Year Cardiac Risk
Enter your details to see your risk.
Understanding Your 10-Year Cardiac Risk
Cardiovascular disease (CVD), including heart attack and stroke, remains a leading cause of mortality worldwide. Identifying individuals at high risk allows for targeted preventive strategies. The 10-year cardiac risk calculator estimates the probability that a person will experience a major cardiovascular event within the next decade.
This calculator is typically based on well-established risk assessment tools like the Framingham Risk Score or the ASCVD Risk Estimator. These models use several key factors to predict risk:
- Age: Risk generally increases with age.
- Sex: Historically, men have had a higher risk at younger ages, but women's risk increases significantly after menopause.
- Cholesterol Levels: High total cholesterol and low HDL (good) cholesterol are associated with increased risk.
- Blood Pressure: High systolic blood pressure and the need for treatment for hypertension significantly raise risk.
- Smoking Status: Current smokers have a substantially higher risk compared to non-smokers.
How the Calculation Works (Simplified Overview)
The exact formulas for cardiac risk calculators are complex and often involve multiple steps, statistical models, and reference points derived from large population studies. For instance, the Framingham Risk Score assigns points based on the values of the input factors. These points are then used to calculate a percentage risk of a cardiovascular event over 10 years.
Example Calculation Logic (Conceptual – Not the exact ASCVD formula):
The calculator takes your inputs (Age, Sex, Cholesterol, HDL, Systolic BP, Hypertension Treatment, Smoking Status) and applies a weighted formula. Each factor contributes to a "risk score." For example:
- Higher age might add points.
- Being male might add points (depending on the specific model).
- Higher Total Cholesterol adds points.
- Lower HDL subtracts points (reduces risk).
- Higher Systolic Blood Pressure adds points.
- Being treated for hypertension adds points.
- Being a current smoker adds significant points.
These accumulated points are then converted into a 10-year percentage risk. For example, a result of 15% means there is a 15% chance of experiencing a heart attack or stroke in the next 10 years.
Use Cases and Limitations
Use Cases:
- Risk Stratification: Helps healthcare providers identify patients who would benefit most from lifestyle changes or medical interventions (e.g., statins, blood pressure medication).
- Patient Education: Empowers individuals to understand their personal risk factors and motivates them to adopt healthier habits.
- Treatment Decisions: Assists in guiding decisions about initiating preventive therapies.
Limitations:
- Population-Based: These scores are derived from population averages and may not perfectly reflect an individual's unique risk.
- Excludes Other Factors: Many calculators do not include factors like family history, physical activity, diet, or ethnicity, which also influence cardiovascular risk.
- Not Diagnostic: This calculator is for risk estimation only and is not a substitute for professional medical diagnosis or advice.
Disclaimer: Always consult with a qualified healthcare professional for personalized medical advice and risk assessment. The results from this calculator should be discussed with your doctor.
function calculateCardiacRisk() {
var age = parseFloat(document.getElementById("age").value);
var sex = document.getElementById("sex").value;
var cholesterol = parseFloat(document.getElementById("cholesterol").value);
var hdlCholesterol = parseFloat(document.getElementById("hdlCholesterol").value);
var systolicBloodPressure = parseFloat(document.getElementById("systolicBloodPressure").value);
var isTreatedForHypertension = document.getElementById("isTreatedForHypertension").value;
var smokingStatus = document.getElementById("smokingStatus").value;
var resultDiv = document.getElementById("result");
resultDiv.innerHTML = "Enter your details to see your risk."; // Reset message
// — Input Validation —
if (isNaN(age) || age 120) {
resultDiv.innerHTML = "Please enter a valid age.";
return;
}
if (isNaN(cholesterol) || cholesterol < 0) {
resultDiv.innerHTML = "Please enter a valid Total Cholesterol level.";
return;
}
if (isNaN(hdlCholesterol) || hdlCholesterol < 0) {
resultDiv.innerHTML = "Please enter a valid HDL Cholesterol level.";
return;
}
if (isNaN(systolicBloodPressure) || systolicBloodPressure 300) {
resultDiv.innerHTML = "Please enter a valid Systolic Blood Pressure.";
return;
}
// — Simplified Risk Calculation (Example based on general principles) —
// IMPORTANT: This is a *highly simplified* example for demonstration.
// Real-world calculators use complex, validated algorithms (e.g., ASCVD or Framingham).
// This example uses arbitrary weights to illustrate the concept.
var riskScore = 0;
// Age points (example ranges)
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;
// Sex points
if (sex === "male") riskScore += 1;
// Cholesterol points (example ranges based on Total Cholesterol/HDL ratio)
var cholRatio = cholesterol / hdlCholesterol;
if (cholRatio >= 5.0) riskScore += 3;
else if (cholRatio >= 4.0) riskScore += 2;
else if (cholRatio >= 3.0) riskScore += 1;
// Systolic Blood Pressure points (example ranges)
var treatedBP = 0;
if (isTreatedForHypertension === "yes") {
treatedBP = 2; // Additional points if treated
if (systolicBloodPressure >= 160) riskScore += 3;
else if (systolicBloodPressure >= 140) riskScore += 2;
else if (systolicBloodPressure >= 130) riskScore += 1;
} else {
if (systolicBloodPressure >= 160) riskScore += 3;
else if (systolicBloodPressure >= 140) riskScore += 2;
else if (systolicBloodPressure >= 130) riskScore += 1;
}
riskScore += treatedBP; // Add points for being treated
// Smoking points
if (smokingStatus === "current") riskScore += 3;
else if (smokingStatus === "former") riskScore += 1;
// — Convert Risk Score to Percentage (Highly Simplified Conversion) —
// This conversion is illustrative and does not reflect actual formulas.
var percentageRisk = 0;
if (riskScore <= 2) percentageRisk = 2;
else if (riskScore === 3) percentageRisk = 3;
else if (riskScore === 4) percentageRisk = 4;
else if (riskScore === 5) percentageRisk = 5;
else if (riskScore === 6) percentageRisk = 6;
else if (riskScore === 7) percentageRisk = 7;
else if (riskScore === 8) percentageRisk = 8;
else if (riskScore === 9) percentageRisk = 9;
else if (riskScore === 10) percentageRisk = 10;
else if (riskScore === 11) percentageRisk = 11;
else if (riskScore === 12) percentageRisk = 13;
else if (riskScore === 13) percentageRisk = 15;
else if (riskScore === 14) percentageRisk = 17;
else if (riskScore === 15) percentageRisk = 20;
else if (riskScore === 16) percentageRisk = 23;
else if (riskScore === 17) percentageRisk = 26;
else if (riskScore === 18) percentageRisk = 30;
else percentageRisk = 35; // For higher scores
resultDiv.innerHTML = percentageRisk.toFixed(1) + "%";
resultDiv.innerHTML += "
10-Year Risk of Cardiovascular Event";
}