Warfarin risk score

CLASSIFYING RISK OF HEMORRHAGE WITH WARFARIN 

Anemia (3 points),

Severe renal disease–defined as glomerular filtration rate  less than 30 ml/min or on dialysis (3 points),

Age  more than/= 75 years (2 points),

Prior bleeding (1 point), and

Hypertension (1 point)

Cumulative point score was associated with major hemorrhage rates ranging from 0.4% (at 0 points) to 17.3% (at 10 points).

Three categories of risk

low risk 0-3 points;
intermediate risk 4 points;
high risk 5-10 points


Ref: http://content.onlinejacc.org/cgi/content/short/58/4/395