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Estimated one year amputation-free survival and the associated hazard ratios based on stratification into low, medium, and high risk groups (PIII derivation set).
| Risk Categories | Integer Score | Amputation-Free Survival |
HR | p-value |
|---|---|---|---|---|
| Low | ≤3 | 85.9 | 1.0 (ref) | — |
| Medium | 4–7 | 73.0 | 2.11 (1.54–2.89) | <.0001 |
| High | ≥8 | 44.6 | 5.50 (3.73–8.10) | <.0001 |
