Table 1.

Cohort Characteristics

	European-Americans (N = 943)	African-Americans (N = 140)	Overall (N = 1083)
Age (years)	67.0 (45.0, 83.8)	60.5 (32.0, 79.0)	67.0 (43.0, 83.0)
Gender (female)	42.7	57.1	44.6
BMI (kg/m2)	28.2 (22.2, 38.0)	30.3 (22.5, 43.1)	28.4 (22.2, 38.3)
Current smokers	9.8	21.4	11.3
Amiodarone use	8.3	8.6	8.3
Enzyme inducers	2.7	2.9	2.7
Indication for warfarin
Atrial fibrillation	56.5	31.4	53.3
Thrombosis	22.4	49.3	25.9
Stroke	5.4	5.0	5.4
Orthopedic	0.2	0.7	0.3
Other	17.3	15.0	17.0

Continuous variables are shown as 10^th, 50^th and 90^th percentiles. Categorical variables are shown as percentages