Age,a years; mean (SD) | 71.5 (8.4) | 71.9 | 71.4 | |
|
Male sex | 144 | 36 | 108 | 1.00 |
|
Any other supplement | 83 | 41 | 42 | <0.001 |
|
Any OTC medication | 32 | 5 | 27 | 0.13 |
|
Diabetes | 25 | 3 | 51 | 0.14 |
|
Reason for taking warfarin: |
Atrial fibrillation | 136 | 39 | 97 | 0.11 |
Previous stroke | 21 | 5 | 16 | 0.56 |
Previous DVT or embolus | 48 | 13 | 35 | 0.72 |
Heart valve replacement | 23 | 4 | 19 | 0.37 |
Heart failure | 11 | 2 | 9 | 0.45 |
|
Duration of use, years; median (IQR)b | 5.0 (2–9) | 5 (2–9) | 5 (2–8.25) | 0.69 |
|
Percentage of INR tests,b median (IQR) |
Below target INR range | 17 (5–28) | 15 (7–31) | 17 (1–27) | 0.99 |
Within target INR range | 67 (50–80) | 69 (52–82) | 65 (49–79) | 0.24 |
Above target INR range | 13 (7–23) | 12 (0–23) | 14 (8–23) | 0.35 |