Stroke Risk Calculator for Young Adults

// Weights chosen for a simple educational score model (not clinical) const maxPossibleScore = Array.from(document.querySelectorAll('.risk')).reduce((acc, cb) => acc + Number(cb.dataset.weight), 0);document.getElementById('scoreMax').textContent = maxPossibleScore;function calculateStrokeRisk() { const age = parseInt(document.getElementById('age').value, 10) || 0; const sex = document.getElementById('sex').value; const checkboxes = Array.from(document.querySelectorAll('.risk')); let score = 0; let selected = [];checkboxes.forEach(cb => { if (cb.checked) { const label = cb.parentNode.textContent.trim(); score += Number(cb.dataset.weight) || 0; selected.push(label); } });// add age modifier for younger vs older in range targeted (10-49). // This is educational only: age 35-49 adds small extra points, = 35 && age <= 49) score += 1; if (age < 25) score -= 0; // keep neutral; stroke in very young often depends on other causes// slight sex-specific marker: hormonal contraceptives affect risk only when combined with other risks. // we don't auto-add points for being female; user should check "current hormonal contraceptive" if relevant.// normalize to a percentage-ish display (0..100) const rawScore = Math.max(0, score); const percent = Math.round((rawScore / maxPossibleScore) * 100);// Interpretation buckets (educational, not clinical) let interpretation = ''; if (percent <= 10) { interpretation = 'Low (based on selected factors). Continue regular care and healthy habits.'; } else if (percent <= 30) { interpretation = 'Moderate — consider addressing modifiable risks (blood pressure, smoking, drugs, obesity). Discuss with a clinician.'; } else if (percent <= 60) { interpretation = 'High — several risk factors present. Strongly consider medical review and risk-reduction steps.'; } else { interpretation = 'Very high — multiple major risk factors present. Seek medical evaluation to discuss prevention and screening.'; }// update UI document.getElementById('scoreVal').textContent = rawScore; document.getElementById('bar').style.width = percent + '%'; // color the bar progressively if (percent <= 30) { document.getElementById('bar').style.background = '#5fd67a'; // greenish } else if (percent <= 60) { document.getElementById('bar').style.background = '#f0c330'; // amber } else { document.getElementById('bar').style.background = '#e6584a'; // red }document.getElementById('interpretation').textContent = interpretation; document.getElementById('resultBox').style.display = 'block';const factorsList = selected.length ? ('Factors checked: ' + selected.join('; ')) : 'No risk factors checked.'; document.getElementById('factorsList').textContent = factorsList;// small summary text on button area let label = ''; if (percent <= 10) label = 'Low'; else if (percent <= 30) label = 'Moderate'; else if (percent <= 60) label = 'High'; else label = 'Very high'; document.getElementById('resultLabel').textContent = label + ' risk'; }function resetForm() { document.getElementById('strokeForm').reset(); document.getElementById('resultBox').style.display = 'none'; document.getElementById('scoreVal').textContent = '0'; document.getElementById('bar').style.width = '0%'; document.getElementById('resultLabel').textContent = ''; document.getElementById('factorsList').textContent = ''; document.getElementById('interpretation').textContent = ''; }