Table II.

Indications for warfarin, INR targets, and median INRs in the study patients

Indication for warfarin	n (%)
AF without mechanical valve	156 (62.6)
Mechanical valve	25 (10.0)
LA or LV thrombus	12 (4.8)
DVT, PE or DVT prophylaxis	54 (21.6)
Unclear	2 (0.8)
Target INR
2.0-3.0	221 (88.8)
2.5-3.5	28 (11.2)
INR (target 2-3), median (IQR)	1.7 (1.2-2.4)
INR (target 2.5-3.5), median (IQR)	2.1 (1.6-2.8)
INRs per person, median (IQR)	9 (3-19)

AF, atrial fibrillation; LA, left atrial; LV, left ventricular; DVT, deep-vein thrombosis; PE, pulmonary embolism; INR, international normalized ratio