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Characteristics of study participants (n=97). Values are numbers of participants unless stated otherwise
| Mean (SD) age (years) | 77 (3.9) |
| Women | 48 |
| Diabetes | 12 |
| Previous cardiovascular accident or transient ischaemic attack | 21 |
| Hypertension | 47 |
| Congestive cardiac failure | 22 |
| Angina or previous myocardial infarction | 25 |
| ⩾1 risk factors | 46 |
| Taking warfarin | 48 |
| Taking aspirin | 39 |
| Taking digoxin | 60 |
