Coronary Disease Risk Calculator

Coronary Heart Disease Risk Calculator (10-Year Risk)

function calculateCoronaryRisk() { var age = parseFloat(document.getElementById('age').value); var gender = document.getElementById('gender').value; var totalCholesterol = parseFloat(document.getElementById('totalCholesterol').value); var hdlCholesterol = parseFloat(document.getElementById('hdlCholesterol').value); var systolicBP = parseFloat(document.getElementById('systolicBP').value); var bpMedication = document.getElementById('bpMedication').value; var smoker = document.getElementById('smoker').value; var diabetes = document.getElementById('diabetes').value; if (isNaN(age) || isNaN(totalCholesterol) || isNaN(hdlCholesterol) || isNaN(systolicBP) || age 79 || totalCholesterol 400 || hdlCholesterol 100 || systolicBP 200) { document.getElementById('result').innerHTML = 'Please enter valid numbers for all fields within the specified ranges.'; return; } var totalPoints = 0; // 1. Age Points if (gender === 'male') { if (age >= 20 && age = 35 && age = 40 && age = 45 && age = 50 && age = 55 && age = 60 && age = 65 && age = 70 && age = 75) totalPoints += 18; } else { // female if (age >= 20 && age = 35 && age = 40 && age = 45 && age = 50 && age = 55 && age = 60 && age = 65 && age = 70 && age = 75) totalPoints += 14; } // 2. Total Cholesterol Points if (gender === 'male') { if (age >= 20 && age <= 39) { if (totalCholesterol = 160 && totalCholesterol = 200 && totalCholesterol = 240 && totalCholesterol = 280) totalPoints += 11; } else if (age >= 40 && age <= 49) { if (totalCholesterol = 160 && totalCholesterol = 200 && totalCholesterol = 240 && totalCholesterol = 280) totalPoints += 8; } else if (age >= 50 && age <= 59) { if (totalCholesterol = 160 && totalCholesterol = 200 && totalCholesterol = 240 && totalCholesterol = 280) totalPoints += 5; } else if (age >= 60 && age <= 69) { if (totalCholesterol = 160 && totalCholesterol = 200 && totalCholesterol = 240 && totalCholesterol = 280) totalPoints += 3; } else if (age >= 70) { if (totalCholesterol = 160 && totalCholesterol = 200 && totalCholesterol = 240 && totalCholesterol = 280) totalPoints += 1; } } else { // female if (age >= 20 && age <= 39) { if (totalCholesterol = 160 && totalCholesterol = 200 && totalCholesterol = 240 && totalCholesterol = 280) totalPoints += 13; } else if (age >= 40 && age <= 49) { if (totalCholesterol = 160 && totalCholesterol = 200 && totalCholesterol = 240 && totalCholesterol = 280) totalPoints += 10; } else if (age >= 50 && age <= 59) { if (totalCholesterol = 160 && totalCholesterol = 200 && totalCholesterol = 240 && totalCholesterol = 280) totalPoints += 7; } else if (age >= 60 && age <= 69) { if (totalCholesterol = 160 && totalCholesterol = 200 && totalCholesterol = 240 && totalCholesterol = 280) totalPoints += 4; } else if (age >= 70) { if (totalCholesterol = 160 && totalCholesterol = 200 && totalCholesterol = 240 && totalCholesterol = 280) totalPoints += 2; } } // 3. HDL Cholesterol Points if (hdlCholesterol >= 60) totalPoints += -1; else if (hdlCholesterol >= 50 && hdlCholesterol = 40 && hdlCholesterol <= 49) totalPoints += 1; else if (hdlCholesterol < 40) totalPoints += 2; // 4. Systolic Blood Pressure Points if (gender === 'male') { if (bpMedication === 'no') { if (systolicBP = 120 && systolicBP = 130 && systolicBP = 140 && systolicBP = 160) totalPoints += 3; } else { // on medication if (systolicBP = 120 && systolicBP = 130 && systolicBP = 140 && systolicBP = 160) totalPoints += 4; } } else { // female if (bpMedication === 'no') { if (systolicBP = 120 && systolicBP = 130 && systolicBP = 140 && systolicBP = 160) totalPoints += 4; } else { // on medication if (systolicBP = 120 && systolicBP = 130 && systolicBP = 140 && systolicBP = 160) totalPoints += 7; } } // 5. Smoker Points if (smoker === 'yes') { if (gender === 'male') totalPoints += 2; else totalPoints += 2; // Same for women in this simplified model } // 6. Diabetes Points if (diabetes === 'yes') { if (gender === 'male') totalPoints += 2; else totalPoints += 2; // Same for women in this simplified model } var riskPercentage = "; var riskCategory = "; // Map total points to 10-year risk percentage (Illustrative Mapping) if (gender === 'male') { if (totalPoints < 0) { riskPercentage = '= 0 && totalPoints 30%'; riskCategory = 'Very High Risk'; } } else { // female if (totalPoints < 0) { riskPercentage = '= 0 && totalPoints 25%'; riskCategory = 'Very High Risk'; } } document.getElementById('result').innerHTML = 'Based on your inputs, your estimated 10-year risk of developing coronary heart disease is: ' + riskPercentage + ' (' + riskCategory + ')This is an illustrative calculation based on common risk factors and should not be used for medical diagnosis. Consult a healthcare professional for personalized advice.'; }

Understanding Your Coronary Heart Disease Risk

Coronary Heart Disease (CHD), also known as Coronary Artery Disease (CAD), is a serious condition where the major blood vessels that supply the heart with blood, oxygen, and nutrients (the coronary arteries) become damaged and narrowed. This is often due to the buildup of plaque (atherosclerosis), which can restrict blood flow to the heart muscle. Over time, this can lead to chest pain (angina), heart attack, or other serious cardiovascular events.

Key Risk Factors for CHD

Several factors can increase your risk of developing CHD. Some are modifiable (can be changed), while others are non-modifiable (cannot be changed). This calculator considers many of the most significant factors:

• Age: The risk of CHD increases with age.
• Gender: Men generally have a higher risk of CHD than women, especially at younger ages. After menopause, a woman's risk tends to increase.
• High Total Cholesterol: High levels of total cholesterol, particularly LDL ("bad") cholesterol, contribute to plaque buildup in arteries.
• Low HDL Cholesterol: HDL ("good") cholesterol helps remove excess cholesterol from arteries, so low levels increase risk.
• High Blood Pressure (Hypertension): High blood pressure damages artery walls, making them more susceptible to plaque formation.
• Smoking: Smoking significantly damages blood vessels, reduces oxygen to the heart, and increases blood pressure and clotting risk.
• Diabetes: High blood sugar levels from diabetes can damage blood vessels and nerves that control the heart.
• Family History: A strong family history of early heart disease (e.g., a father or brother diagnosed before age 55, or a mother or sister before age 65) increases your risk. (Note: This calculator does not include family history, but it's a crucial factor.)
• Obesity/Overweight: Excess weight often contributes to other risk factors like high blood pressure, high cholesterol, and diabetes.
• Physical Inactivity: Lack of exercise contributes to obesity, high blood pressure, high cholesterol, and diabetes.

How This Calculator Works (Simplified Model)

This Coronary Heart Disease Risk Calculator uses a simplified scoring system based on common risk factors to estimate your 10-year risk of developing CHD. It assigns points for each risk factor based on your age, gender, cholesterol levels, blood pressure, smoking status, and diabetes status. The total points are then mapped to an estimated risk percentage.

It's important to understand:

• This calculator provides an illustrative estimate and is not a substitute for professional medical advice or a comprehensive clinical assessment.
• Actual clinical risk scores (like the Framingham Risk Score or ASCVD Risk Estimator) use more complex algorithms and may include additional factors.
• The results are for informational purposes only to help you understand potential risk factors.

Interpreting Your Results

The calculator will provide a 10-year risk percentage and a general risk category (e.g., Low, Borderline, Intermediate, High, Very High). This percentage indicates the likelihood of experiencing a coronary event within the next decade based on the provided inputs.

• Low Risk: Generally, a 10-year risk of less than 5%.
• Borderline Risk: Typically between 5% and 7.5%.
• Intermediate Risk: Often between 7.5% and 20%.
• High Risk: Usually 20% or higher.

Regardless of your calculated risk, maintaining a healthy lifestyle is crucial for preventing heart disease. If your risk is elevated, or if you have concerns, please consult with your doctor. They can provide a thorough evaluation, discuss your individual risk profile, and recommend appropriate preventive strategies or treatments.

Examples of Risk Calculation:

Example 1: Low Risk Profile

• Age: 40 years
• Gender: Female
• Total Cholesterol: 180 mg/dL
• HDL Cholesterol: 65 mg/dL
• Systolic Blood Pressure: 115 mmHg
• On BP Medication: No
• Smoker: No
• Diabetes: No
• Estimated 10-Year Risk: Likely 1-2% (Low Risk)

Example 2: Intermediate Risk Profile

• Age: 55 years
• Gender: Male
• Total Cholesterol: 220 mg/dL
• HDL Cholesterol: 45 mg/dL
• Systolic Blood Pressure: 145 mmHg
• On BP Medication: Yes
• Smoker: No
• Diabetes: No
• Estimated 10-Year Risk: Likely 8-12% (Intermediate Risk)

Example 3: High Risk Profile

• Age: 60 years
• Gender: Male
• Total Cholesterol: 260 mg/dL
• HDL Cholesterol: 35 mg/dL
• Systolic Blood Pressure: 165 mmHg
• On BP Medication: Yes
• Smoker: Yes
• Diabetes: Yes
• Estimated 10-Year Risk: Likely >20% (High/Very High Risk)

Remember, these examples are illustrative. Use the calculator above with your own data for a personalized (though still illustrative) estimate.