Exhibit 68. Results of logistic regression using the derivation dataset for only appendectomy surgeries
| Variable | Estimate | tValue | Probability |
|---|---|---|---|
| Intercept | -2.31 | -0.88 | 0.3806 |
| Age | 0.01 | 1.12 | 0.2634 |
| Charlson score* | 0.20 | 1.96 | 0.0496 |
| Diabetes | -1.07 | -1.12 | 0.2646 |
| General anesthesia | -1.25 | -0.82 | 0.4100 |
| History of MRSA | 1.51 | 1.32 | 0.1860 |
| Postop admission | 2.21 | 4.56 | 0.0000 |
| Postop hematocrit | -0.14 | -2.00 | 0.0478 |
| Postop hemoglobin | 0.27 | 1.02 | 0.3178 |
| Preop glucose* | 0.01 | 0.99 | 0.3222 |
| Preop hemoglobin | -0.16 | -0.68 | 0.5045 |
*Additional Intermountain risk factor.
Exhibit 69. Results of logistic regression using the validation dataset for only appendectomy surgeries.
| Variable | Estimate | tValue | Probability |
|---|---|---|---|
| Intercept | -4.95 | -1.27 | 0.2050 |
| Age | -0.01 | -0.21 | 0.8311 |
| Charleson score* | -0.32 | -0.78 | 0.4367 |
| Diabetes | 1.90 | 1.24 | 0.2134 |
| General anesthesia@ | |||
| History of MRSA@ | |||
| Postop admission | 2.40 | 2.92 | 0.0035 |
| Postop hematocrit | -0.28 | -2.09 | 0.0392 |
| Postop hemoglobin | 0.84 | 2.06 | 0.0434 |
| Preop glucose* | -0.01 | -0.92 | 0.3632 |
| Preop hemoglobin | -0.09 | -0.31 | 0.7564 |
@No patients in this dataset had the specific risk factor and no probability could be calculated.
*Additional Intermountain risk factor.
Exhibit 70. Results of logistic regression using the combined dataset for only appendectomy surgeries
| Variable | Estimate | tValue | Probability |
|---|---|---|---|
| Intercept | -3.34 | -1.48 | 0.1399 |
| Age | 0.01 | 1.01 | 0.3142 |
| Charlson score* | 0.16 | 1.65 | 0.0995 |
| Diabetes | -0.62 | -0.79 | 0.4299 |
| General anesthesia | -1.72 | -1.33 | 0.1823 |
| History of MRSA | 0.97 | 0.89 | 0.3710 |
| Postop admission | 2.27 | 5.43 | 0.0000 |
| Postop hematocrit | -0.13 | -2.24 | 0.0263 |
| Postop hemoglobin | 0.40 | 2.15 | 0.0317 |
| Preop glucose* | 0.00 | 0.65 | 0.5150 |
| Preop hemoglobin | -0.16 | -0.97 | 0.3379 |
*Additional Intermountain risk factor.
