// Initialize sliders
document.addEventListener(‘DOMContentLoaded’, function() {
// Update pack-years calculation when smoking inputs change
document.getElementById(‘smoking-years’).addEventListener(‘input’, updatePackYears);
document.getElementById(‘cigarettes-per-day’).addEventListener(‘input’, updatePackYears);
// Hide smoking details if never smoked
document.getElementById(‘smoking-status’).addEventListener(‘change’, function() {
const smokingDetails = document.querySelectorAll(‘#smoking-years, #cigarettes-per-day, #quit-years’);
if (this.value === ‘never’) {
smokingDetails.forEach(el => {
el.style.display = ‘none’;
el.previousElementSibling.style.display = ‘none’;
});
} else {
smokingDetails.forEach(el => {
el.style.display = ‘block’;
el.previousElementSibling.style.display = ‘block’;
});
}
});
});function updatePackYears() {
const years = parseInt(document.getElementById(‘smoking-years’).value) || 0;
const perDay = parseInt(document.getElementById(‘cigarettes-per-day’).value) || 0;
const packYears = (years * perDay) / 20;
document.getElementById(‘pack-years-display’).textContent = packYears.toFixed(1);
}function calculateRisk() {
// Validate required fields
const name = document.getElementById(‘name’).value;
const age = parseInt(document.getElementById(‘age’).value);
const gender = document.getElementById(‘gender’).value;
if (!name || !age || !gender) {
alert(‘Please fill in all required fields (Name, Age, Gender)’);
return;
}// Risk calculation logic
let score = 0;
// Age factor (risk increases with age)
if (age >= 55) score += 10;
if (age >= 65) score += 5;
if (age >= 75) score += 5;
// Smoking factors
const smokingStatus = document.getElementById(‘smoking-status’).value;
if (smokingStatus === ‘current’) {
const years = parseInt(document.getElementById(‘smoking-years’).value) || 0;
const perDay = parseInt(document.getElementById(‘cigarettes-per-day’).value) || 0;
const packYears = (years * perDay) / 20;
score += Math.min(packYears * 0.5, 30); // Max 30 points for smoking
} else if (smokingStatus === ‘former’) {
const quitYears = parseInt(document.getElementById(‘quit-years’).value) || 0;
const years = parseInt(document.getElementById(‘smoking-years’).value) || 0;
const perDay = parseInt(document.getElementById(‘cigarettes-per-day’).value) || 0;
const packYears = (years * perDay) / 20;
// Reduced risk over time after quitting
let smokingScore = packYears * 0.4;
if (quitYears < 5) smokingScore *= 0.8;
else if (quitYears < 10) smokingScore *= 0.6;
else if (quitYears < 15) smokingScore *= 0.4;
else smokingScore *= 0.2;
score += Math.min(smokingScore, 25); // Max 25 for former smokers
}
// Environmental factors
score += parseInt(document.getElementById('radon').value) * 5;
if (document.getElementById('asbestos').checked) score += 8;
score += parseInt(document.getElementById('pollution').value) * 3;
// Medical history
score += parseInt(document.getElementById('family-history').value) * 4;
if (document.getElementById('copd').checked) score += 7;
if (document.getElementById('previous-cancer').checked) score += 15;
// Lifestyle factors (these reduce risk)
score += parseInt(document.getElementById('exercise').value);
score += parseInt(document.getElementById('diet').value);
score += parseInt(document.getElementById('alcohol').value);
// Cap score at 100
score = Math.min(Math.max(score, 0), 100);// Display results
document.getElementById('results-section').style.display = 'block';
document.getElementById('risk-score').textContent = score.toFixed(0);
// Update risk indicator
const indicator = document.getElementById('risk-indicator');
const percentage = score;
indicator.style.left = `${percentage}%`;// Interpretation and category
const category = document.getElementById('risk-category');
const interpretation = document.getElementById('risk-interpretation');
const recommendations = document.getElementById('recommendations-list');
if (score < 20) {
category.textContent = 'Low Risk';
category.className = 'result-category low-risk';
interpretation.innerHTML = `
Your calculated lung cancer risk is in the low range.
This means you have a lower probability of developing lung cancer compared
to the general population based on the factors you provided.
However, no risk assessment tool can guarantee you won’t develop lung cancer.
Continue healthy habits and regular check-ups.
`;
recommendations.innerHTML = `
Maintain your healthy lifestyle with regular exercise and a balanced diet
Avoid tobacco smoke and other environmental pollutants
Consider annual check-ups with your primary care physician
Your calculated lung cancer risk is in the moderate range.
This means you may have an elevated risk compared to the general population
based on the factors you provided.
Several factors contribute to this assessment. The good news is that many
risk factors can be modified to reduce your risk.
`;
recommendations.innerHTML = `
If you smoke, consider quitting – speak with your doctor about cessation programs
Test your home for radon if you haven’t recently
Discuss lung cancer screening options with your doctor
Increase physical activity and maintain a diet rich in fruits and vegetables
Your calculated lung cancer risk is in the high range.
This means you have a significantly elevated risk compared to the general
population based on the factors you provided.
It’s important to note that this doesn’t mean you will definitely develop
lung cancer, but you should take proactive steps to monitor your health and
reduce modifiable risk factors.
`;
recommendations.innerHTML = `
Consult with a healthcare professional immediately to discuss your risk factors
If you smoke, seek smoking cessation support immediately
Ask your doctor about low-dose CT (LDCT) screening for lung cancer
Test your home for radon and mitigate if levels are high
Minimize exposure to other lung irritants like air pollution and asbestos
Adopt a lung-healthy lifestyle with regular exercise and antioxidant-rich foods
Consider genetic counseling if you have strong family history
Lung cancer remains the leading cause of cancer-related deaths globally, with 1.8 million fatalities annually. Early detection and risk assessment are critical for improving survival rates. Our Free Lung Cancer Risk Calculator evaluates your health profile using clinically validated parameters to estimate your risk level and provide actionable insights.
Key Terms Explained
1. Lung Cancer
A malignant tumor characterized by uncontrolled cell growth in lung tissues, often linked to smoking, environmental toxins, and genetic factors.
2. Risk Factors
Variables that increase the likelihood of developing lung cancer:
Modifiable Risks: Smoking, radon exposure, air pollution
Non-Modifiable Risks: Age, genetic predisposition, family history
3. Pack-Year (Smoking History)
A unit measuring smoking intensity (e.g., 1 pack/day for 1 year = 1 pack-year).
4. Radon Exposure
A radioactive gas and leading cause of lung cancer, is often found in homes.
How Our Lung Cancer Risk Calculator Works
Input Parameters & Their Clinical Significance
Our tool evaluates:
Parameter
Why It Matters
Age
Risk increases significantly after 55
Smoking History
Directly correlates with cellular damage
Radon Exposure
Causes DNA mutations in lung cells
Asbestos Exposure
Linked to mesothelioma and lung cancer
Family History
Genetic predisposition raises risk by 15-25%
Table: Input Parameters & Their Clinical Significance
Interpreting Your Results
The calculator generates a color-coded risk score:
Green (Low Risk): 0–20 points – Maintain preventive care (e.g., annual screenings).
Yellow (Moderate Risk): 21–50 points – Consult a pulmonologist for further testing.
Red (High Risk): 51+ points – Seek immediate medical evaluation and CT scans.
Dr. Rehan is an expert medical professional dedicated to providing accurate and reliable healthcare content, upholding Doseway's commitment to excellence..
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