Patient demographic characteristics: N = 25.
| CHARACTERISTIC | VALUE |
|---|---|
| Female sex, n (%) | 17 (68.0) |
| Mean (SD; range) age, y | 76.0 (9.4; 56.0 to 89.0) |
| Mean (SD; range) body weight,* kg | 84.0 (26.6; 53.5 to 144.4) |
| Mean (SD; range) eGFR,† mL/min | 59.2 (19.5; 25 to 103) |
| Comorbidities, n (%) | |
| • Hypertension | 19 (76.0) |
| • Heart failure | 3 (12.0) |
| • Coronary artery disease | 3 (12.0) |
| • Diabetes | 9 (36.0) |
| • Stroke or TIA | 1 (4.0) |
| • Hypothyroidism | 5 (20.0) |
| • Hyperthyroidism | 2 (8.0) |
| Mean (SD) CHADS2 score | 2.0 (0.7) |
| Warfarin potentiating medications, n (%) | |
| • Acetaminophen‡ | 11 (44.0) |
| • Antibiotics | 2 (8.0) |
| • Proton pump inhibitors | 8 (32.0) |
| • Amiodarone | 1 (4.0) |
| • Selective serotonin reuptake inhibitors | 3 (12.0) |
CHADS2—congestive heart failure, hypertension, age ≥ 75 y, diabetes mellitus, and stroke or TIA; eGFR—estimated glomerular filtration rate; TIA—transient ischemic attack.
↵* Data missing for 4 patients.
↵† The eGFR for 1 patient was recorded as > 120 mL/min and was not incorporated into the mean.
↵‡ For 1 patient it was unclear whether he or she was taking acetaminophen.