Table 4: Statistically significant risk factors for amputation identified in the multivariate analysis.
| Risk factor | p-value | Hazard ratio | 95.0% confidence interval |
|---|---|---|---|
| Wagner 5 versus Wagner 0–2 | 0.000 | 5.941 | 2.866–12.317 |
| Wagner 4 versus Wagner 0–2 | 0.000 | 4.122 | 2.599–6.538 |
| Wagner 3 versus Wagner 0–2 | 0.004 | 2.209 | 1.296–3.765 |
| Atherosclerotic peripheral arteries | 0.004 | 2.344 | 1.313–4.185 |
| Hypertension | 0.013 | 2.071 | 1.169–3.674 |
| Platelet count >318×103/µL | 0.001 | 1.799 | 1.276–2.537 |
| Haematocrit <33.0% | 0.001 | 1.790 | 1.279–2.506 |
| Hypercholesterolaemia | 0.043 | 1.669 | 1.017–2.738 |
| Male sex | 0.019 | 1.566 | 1.075–2.282 |
CI = confidence interval.