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health.CHADS2-stroke-score Calculator
Calculates the CHADS₂ stroke risk score in atrial fibrillation from five clinical factors and recommends anticoagulation intensity. CHADS₂ score ≥2 warrants therapeutic anticoagulation — the CHA₂DS₂-VASc score is now preferred in guidelines but CHADS₂ remains widely used.
Inputs
Chf
Reference formula or conversion factor shown for context.
Hypertension
Reference formula or conversion factor shown for context.
Age 75 Plus
Age in completed years. Many health and fitness formulas adjust for age.
Diabetes
Reference formula or conversion factor shown for context.
Prior Stroke Tia
Reference formula or conversion factor shown for context.
Results
CHADS₂ score
A numerical rating from the scoring model in use.
annual stroke risk estimate (%)
The result expressed on a per-year basis.
anticoagulation recommendation
Suggested action or value based on the computed results and applicable best-practice guidelines.
CHADS₂ = CHF+HTN+Age75+DM+2×Stroke/TIA
Sample size or count used in the calculation.
CHA₂DS₂-VASc
Reference formula or conversion factor shown for context.
bleeding risk
Overall risk level based on the computed score or classification. Higher risk may call for mitigating actions or additional review.