Table 3.
Multivariate Regression for 30-day Readmission
| Characteristic | Odds Ratios (95%CI) for 30-day Readmission | |
|---|---|---|
| Model without AKIN Stage | Model with AKIN Stage | |
| Acute Kidney Injury Severity | ||
| No AKI | - | reference |
| Stage 1 | - | 1.81 (1.35, 2.44) |
| Stage 2 | - | 2.39 (1.38, 4.14) |
| Stage 3 | - | 3.47 (1.85, 6.50) |
| Other risk factors | ||
| WBC>12,000 | 1.83 (1.15, 2.91) | 1.70 (1.06, 2.74) |
| Single vessel disease | 1.57 (1.15, 2.15) | 1.60 (1.17, 2.20) |
| Two vessel disease | 1.35 (0.96, 1.89) | 1.33 (0.95, 1.87) |
| On-pump surgery | 2.08 (1.10, 3.90) | 2.01 (1.06, 3.80) |
| Nadir Hematocrit on pump <20 | 1.50 (1.06, 2.11) | 1.40 (0.99, 1.98) |
| Mediastinitis | 6.80 (2.32, 19.87) | 5.16 (1.72, 15.43) |
| Model Parameters | ||
| Hosmer-Lemeshow goodness of fit | χ2=4.44, p=0.3 | χ2=5.25, p=0.4 |
| ROC curve | 0.60 (0.56, 0.63) | 0.65 (0.61, 0.68) |
| ROC compared to Other Risk Factors | 0.001 | |
*
AKI: Acute Kideny Injury. ROC: receiver operating characteristic curve. χ2: chi-square value for Hosmer-Lemeshow goodness of fit test.