| Characteristic | Entire group | Complication group |
| Number (%) n = 197 | Number (%) n = 7 | |
| Average age, years | 41.7 | 50.0 |
| Mean weight, kg | 73.2 | 70.6 |
| Female | 106 (53.8) | 6 (85.7) |
| Previous catheterisation | 44 (22.3) | 2 (28.6) |
| Diabetes | 5 (2.5) | 1 (14.3) |
| History of smoking | 27 (13.7) | 0 (0.0) |
| Warfarin | 42 (21.3) | 3 (42.9) |
| Received heparin | 107 (54.3) | 5 (71.4) |
| Closure device | 3 (1.5) | 0 (0.0) |