eTable 6. Subgroups of amputations according to etiology.
| Subgroup | Proportion |
| All amputations | |
| Ischemic | 81.7% (n=1254) |
| Traumatic | 1.4% (n=21) |
| Ischemic and traumatic | 1.2% (n=19) |
| Neither ischemic nor traumatic | 15.6% (n=240) |
| Transfemoral amputation | |
| Ischemic | 89.1% (n=82) |
| Traumatic | 1.1% (n=1) |
| Ischemic and traumatic | 0% (n=0) |
| Neither ischemic nor traumatic | 9.8% (n=9) |
| Transtibial amputation | |
| Ischemic | 87.5% (n=63) |
| Traumatic | 1.4% (n=1) |
| Ischemic and traumatic | 0% (n=0) |
| Neither ischemic nor traumatic | 11.1% (n=8) |
| Amputation of toe | |
| Ischemic | 79% (n=889) |
| Traumatic | 1.2% (n=13) |
| Ischemic and traumatic | 1.2% (n=14) |
| Neither ischemic nor traumatic | 18.6% (n=209) |
Presented are the absolute and relative frequencies for the etiology of amputations.