Table 2: CHADS2 Scheme

RISK FACTORS POINTS TOTAL SCORE RISK OF STROKE
Prior stroke or TIA 2 3-6 High 5.9% - 18.2% per year
Age > 75 years 1
Diabetes mellitus 1 1-2 Intermediate 2.8% – 4% per year
Arterial hypertension 1
Congestive heart failure 1 0 Low 1.2% -3% per year