Patient demographics
| n | 226 |
| Men | 133 (59) |
| Symptomatic | 82 (36) |
| Asymptomatic | 144 (64) |
| ‘Low risk’ trials | 43 (19) |
| Cardiopulmonary ‘high risk’ | 58 (26) |
| Anatomic ‘high risk’ | 64 (28) |
| Age (years) (range) | 41–89 |
| Age >80 years | 29 (13) |
| Age >75 years | 63 (28) |
Values are number (%) unless otherwise stated.