Table 5.
Univariate logistic regression analysis of laboratory parameters for predicting amputation
| Univariate Analysis | Sensitivity | Specificity | Cut-Off* | Odds Ratio | 95% CI | p-value | |
|---|---|---|---|---|---|---|---|
|
| |||||||
| Lower | Upper | ||||||
| Myoglobin (Initial) | 0.78 | 0.65 | 3450 (mg/dL) | 6.50 | 1.053 | 40.132 | 0.04 |
| Uric Acid (Initial) | 0.56 | 0.89 | 9.9 (mg/dL) | 10.63 | 1.484 | 76.081 | 0.02 |
| CK (Mean) | 0.44 | 0.90 | 34800 (U/L) | 7.20 | 1.009 | 51.392 | 0.04 |
| BUN (Mean) | 0.56 | 0.85 | 25 (mg/dL) | 7.08 | 1.172 | 42.793 | 0.03 |
| Creatinine (Mean) | 0.56 | 0.90 | 1.7(mg/dL) | 11.25 | 1.576 | 80.300 | 0.02 |
*
Cut-off values are based on a supervised discretization method. CK: Creatine kinase; BUN: Blood urea nitrogen; Se: Sensitivity; Sp: Specificity.