Supplementary Table II (online only).
Multivariate Cox proportional hazard model for 30-day amputation
| Hazard ratio | 95% CI | P-value | |
|---|---|---|---|
| COVID-19 infection | 6.2 | 2.3-16.8 | <.001 |
| Age | 1.1 | 1.0-1.1 | .006 |
| Gendera | 0.6 | 0.2-1.5 | .268 |
| History of vascular interventionb | |||
| Endoscopic | 0.4 | 0.11-1.5 | .168 |
| Open | 1.4 | 0.4-5.4 | .63 |
| Rutherford classificationc | |||
| Class IIa | 2.7 | 0.7-10.8 | .156 |
| Class IIb | 2.8 | 0.7-11.7 | .158 |
| Class III | 3.6 | 0.5-23.9 | .186 |
| Treatment typed | |||
| Endovascular | 0.3 | 0.1-1.7 | .179 |
| Hybrid | 1.3 | 0.4-4.1 | .591 |
| Medical only | 0.9 | 0.2-4.1 | .984 |
| Amputation | 4.5 | 0.5-42.9 | .196 |
CI, Confidence interval; COVID-19, coronavirus 2019.
a
Male gender is the reference group.
b
No history of vascular interventions is the reference group.
c
Rutherford Class I is the reference group.
d
Open surgical treatment is the reference group.