Calculates the ATRIA stroke risk score for atrial fibrillation. Assigns points: prior stroke 6pts, age ≥85 yrs 3pts, age 75–84 yrs 2pts, age 65–74 yrs 1pt, diabetes 1pt, female sex 1pt, CHF 1pt, proteinuria 1pt, eGFR <45 mL/min/1.73m² 1pt. Score 0–5 = low risk; 6 = intermediate; 7–15 = high risk.
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