Bleeding Risk Model of Shireman et al for an Elderly Patient Being Treated with Warfarin

Patient selection: patients with atrial fibrillation, typically > 65 years of age

Parameters:

(1) age of the patient in years

(2) gender

(3) history of remote bleeding

(4) history of recent bleeding

(5) alcohol and/or drug abuse

(6) diabetes mellitus

(7) anemia

(8) therapy with an antiplatelet agent

risk score =

= (0.49 * (points for age of the patient)) + (0.32 * (points for gender)) + (0.58 * (points for remote bleeding)) + (0.62 * (points for recent bleeding)) + (0.71 * (points for alcohol or drug abuse)) + (0.27 * (points for diabetes)) + (0.86 * (points for anemia)) + (0.32 * (points for antiplatelet agent therapy))

Interpretation:

• minimum score: 0

• maximum score: 4.17

• The higher the score the greater the risk of bleeding.