Table 1.
Patient characteristics according to warfarin status
| Characteristic | No warfarin (n= 9,265) n (% of total) |
Warfarin (n= 372) n (% of total) |
P value warfarin vs. no warfarin | Missing (n= 629) n (% of total) |
|---|---|---|---|---|
| Gender | ||||
| Female | 3,226 (35) | 63(17) | <0.0001 | 197(31.3) |
| Male | 6,039 (65) | 309(83) | 432(68.7) | |
| Age (years) | ||||
| <50 | 1,180 (13) | 4(1) | <0.0001 | 59(9.4) |
| 50–59 | 3,441 (37) | 72(19) | 220 (35) | |
| 60–69 | 2,573 (28) | 103(28) | 180(28.6) | |
| 70–79 | 1,557 (17) | 127(34) | 132 (21) | |
| 80 | 514 (6) | 66(18) | 38 (6) | |
| Race/ethnicity | ||||
| White non-Hispanic | 7,382 (80) | 329(88) | 0.01 | 515(81.9) |
| Black non-Hispanic | 548 (6) | 12(3) | 58(9.2) | |
| Asian/Pacifi c Islander non-Hispanic | 254 (3) | 6(2) | 6 (1) | |
| Hispanic | 977 (11) | 21(6) | 39(6.2) | |
| Native American non-Hispanic | 75 (<1) | 3 (<1) | 4 (<1) | |
| Multiracial non-Hispanic | 9 (<1) | 0(0) | 1 (<1) | |
| Unknown | 20 (<1) | 1 (<1) | 6 (1) | |
| Site type | ||||
| Community/HMO | 4,999 (54) | 150(40) | <0.0001 | 439(69.8) |
| Academic | 1,188 (13) | 25(7) | 22(3.5) | |
| VA/military | 3,078 (33) | 197(53) | 168(26.7) |
VA, Veterans Affairs; HMO, Health Maintenance Organization.