function getSelectedRadioValue(name) {
var radios = document.getElementsByName(name);
for (var i = 0; i = 20 && age = 35 && age = 40 && age = 45 && age = 50 && age = 55 && age = 60 && age = 65 && age = 70 && age = 75 && age = 20 && age = 35 && age = 40 && age = 45 && age = 50 && age = 55 && age = 60 && age = 65 && age = 70 && age = 75 && age = 20 && age <= 39) {
if (totalChol = 160 && totalChol = 200 && totalChol = 240 && totalChol = 280) return 13;
} else if (age >= 40 && age <= 49) {
if (totalChol = 160 && totalChol = 200 && totalChol = 240 && totalChol = 280) return 10;
} else if (age >= 50 && age <= 59) {
if (totalChol = 160 && totalChol = 200 && totalChol = 240 && totalChol = 280) return 7;
} else if (age >= 60 && age <= 69) {
if (totalChol = 160 && totalChol = 200 && totalChol = 240 && totalChol = 280) return 4;
} else if (age >= 70 && age <= 79) {
if (totalChol = 160 && totalChol = 200 && totalChol = 240 && totalChol = 280) return 2;
}
return 0;
}
function getTotalCholesterolPointsFemale(age, totalChol) {
if (age >= 20 && age <= 39) {
if (totalChol = 160 && totalChol = 200 && totalChol = 240 && totalChol = 280) return 13;
} else if (age >= 40 && age <= 49) {
if (totalChol = 160 && totalChol = 200 && totalChol = 240 && totalChol = 280) return 10;
} else if (age >= 50 && age <= 59) {
if (totalChol = 160 && totalChol = 200 && totalChol = 240 && totalChol = 280) return 7;
} else if (age >= 60 && age <= 69) {
if (totalChol = 160 && totalChol = 200 && totalChol = 240 && totalChol = 280) return 4;
} else if (age >= 70 && age <= 79) {
if (totalChol = 160 && totalChol = 200 && totalChol = 240 && totalChol = 280) return 2;
}
return 0;
}
function getHdlCholesterolPoints(hdlChol) {
if (hdlChol >= 60) return -1;
if (hdlChol >= 50 && hdlChol = 40 && hdlChol <= 49) return 1;
if (hdlChol < 40) return 2;
return 0;
}
function getSystolicBpPointsMale(systolicBP, onBpMed) {
if (onBpMed === 'no') {
if (systolicBP = 120 && systolicBP = 130 && systolicBP = 140 && systolicBP = 160) return 3;
} else { // onBpMed === 'yes'
if (systolicBP = 120 && systolicBP = 130 && systolicBP = 140 && systolicBP = 160) return 4;
}
return 0;
}
function getSystolicBpPointsFemale(systolicBP, onBpMed) {
if (onBpMed === 'no') {
if (systolicBP = 120 && systolicBP = 130 && systolicBP = 140 && systolicBP = 160) return 4;
} else { // onBpMed === 'yes'
if (systolicBP = 120 && systolicBP = 130 && systolicBP = 140 && systolicBP = 160) return 5;
}
return 0;
}
function getSmokingPointsMale(smoker) {
return smoker === 'yes' ? 4 : 0;
}
function getSmokingPointsFemale(smoker) {
return smoker === 'yes' ? 3 : 0;
}
function getDiabetesPointsMale(diabetes) {
return diabetes === 'yes' ? 2 : 0;
}
function getDiabetesPointsFemale(diabetes) {
return diabetes === 'yes' ? 3 : 0;
}
function getRiskPercentageMale(totalPoints) {
if (totalPoints <= 4) return "= 17) return ">=30%";
return "N/A";
}
function getRiskPercentageFemale(totalPoints) {
if (totalPoints <= 8) return "= 25) return ">=30%";
return "N/A";
}
function calculateFraminghamRisk() {
var age = parseInt(document.getElementById('age').value);
var totalCholesterol = parseFloat(document.getElementById('totalCholesterol').value);
var hdlCholesterol = parseFloat(document.getElementById('hdlCholesterol').value);
var systolicBP = parseInt(document.getElementById('systolicBP').value);
var sex = getSelectedRadioValue('sex');
var smoker = getSelectedRadioValue('smoker');
var bpMed = getSelectedRadioValue('bpMed');
var diabetes = getSelectedRadioValue('diabetes');
var resultDiv = document.getElementById('framinghamResult');
resultDiv.style.color = '#dc3545'; // Default to error color
if (isNaN(age) || age 79) {
resultDiv.innerHTML = "Please enter a valid age between 20 and 79.";
return;
}
if (isNaN(totalCholesterol) || totalCholesterol <= 0) {
resultDiv.innerHTML = "Please enter a valid Total Cholesterol (mg/dL).";
return;
}
if (isNaN(hdlCholesterol) || hdlCholesterol <= 0) {
resultDiv.innerHTML = "Please enter a valid HDL Cholesterol (mg/dL).";
return;
}
if (isNaN(systolicBP) || systolicBP <= 0) {
resultDiv.innerHTML = "Please enter a valid Systolic Blood Pressure (mmHg).";
return;
}
if (!sex || !smoker || !bpMed || !diabetes) {
resultDiv.innerHTML = "Please select all radio button options.";
return;
}
var totalPoints = 0;
if (sex === 'male') {
totalPoints += getAgePointsMale(age);
totalPoints += getTotalCholesterolPointsMale(age, totalCholesterol);
totalPoints += getHdlCholesterolPoints(hdlCholesterol);
totalPoints += getSystolicBpPointsMale(systolicBP, bpMed);
totalPoints += getSmokingPointsMale(smoker);
totalPoints += getDiabetesPointsMale(diabetes);
} else { // female
totalPoints += getAgePointsFemale(age);
totalPoints += getTotalCholesterolPointsFemale(age, totalCholesterol);
totalPoints += getHdlCholesterolPoints(hdlCholesterol);
totalPoints += getSystolicBpPointsFemale(systolicBP, bpMed);
totalPoints += getSmokingPointsFemale(smoker);
totalPoints += getDiabetesPointsFemale(diabetes);
}
var riskPercentage;
if (sex === 'male') {
riskPercentage = getRiskPercentageMale(totalPoints);
} else {
riskPercentage = getRiskPercentageFemale(totalPoints);
}
resultDiv.style.color = '#28a745'; // Success color
resultDiv.innerHTML = "Your estimated 10-Year CHD Risk is: " + riskPercentage + " (Total Points: " + totalPoints + ")";
}
Understanding the Framingham 10-Year CHD Risk Calculator
The Framingham Risk Score is a widely used algorithm that estimates an individual's 10-year risk of developing coronary heart disease (CHD). Developed from data collected in the Framingham Heart Study, this tool helps healthcare professionals and individuals understand their cardiovascular risk profile based on several key factors.
What is Coronary Heart Disease (CHD)?
Coronary heart disease is a condition where the major blood vessels that supply the heart (coronary arteries) become narrowed or blocked due to the buildup of plaque, a process called atherosclerosis. This can lead to symptoms like angina (chest pain), heart attack, or other serious cardiovascular events.
Factors Considered in the Calculator
The Framingham Risk Calculator takes into account several modifiable and non-modifiable risk factors to provide a comprehensive risk assessment. These include:
Age: Risk generally increases with age.
Sex: Men and women have different risk profiles and point assignments.
Total Cholesterol: High levels of total cholesterol, particularly LDL ("bad") cholesterol, contribute to plaque buildup.
HDL Cholesterol: High-density lipoprotein (HDL) is often called "good" cholesterol because it helps remove excess cholesterol from the arteries. Higher HDL levels are protective.
Systolic Blood Pressure: The top number in a blood pressure reading, high systolic pressure indicates increased strain on the arteries.
On Blood Pressure Medication: Whether an individual is being treated for high blood pressure is a significant factor, as medication indicates a managed risk.
Smoking Status: Smoking is a major risk factor for CHD, significantly damaging blood vessels.
Diabetes Status: Diabetes greatly increases the risk of heart disease due due to its effects on blood vessels and cholesterol levels.
How to Interpret Your Results
The calculator provides a percentage representing your estimated risk of developing CHD within the next 10 years. Generally, the risk categories are:
Low Risk: Less than 10%
Intermediate Risk: 10% to 20%
High Risk: Greater than 20%
It's important to remember that this calculator provides an estimate and is not a definitive diagnosis. A higher risk score suggests that you and your healthcare provider should discuss strategies to reduce your risk, such as lifestyle changes (diet, exercise, quitting smoking) or medical interventions.
Limitations and Importance
While the Framingham Risk Score is a valuable tool, it has limitations. It may not capture all risk factors (e.g., family history, ethnicity, inflammatory markers) and is best used for individuals aged 20-79. It serves as a guide for discussion with your doctor, who can provide personalized advice based on your complete medical history and current health status.
Regular check-ups and open communication with your healthcare provider are crucial for managing your cardiovascular health effectively.
Example Scenario:
Let's consider a 55-year-old male who is a smoker, not on BP medication, and not diabetic. His total cholesterol is 220 mg/dL, HDL cholesterol is 45 mg/dL, and systolic blood pressure is 145 mmHg.
Age (55, Male): 13 points
Total Cholesterol (220 mg/dL, Age 50-59 Male): 4 points
HDL Cholesterol (45 mg/dL): 1 point
Systolic BP (145 mmHg, Untreated Male): 2 points
Smoker (Yes, Male): 4 points
Diabetic (No, Male): 0 points
Total Points: 13 + 4 + 1 + 2 + 4 + 0 = 24 points.
According to the male risk percentage table, 24 points would place him in the >=30% 10-year CHD risk category, indicating a very high risk that warrants immediate medical attention and lifestyle changes.