Exhibit 56. Results of logistic regression using the derivation dataset for only CABG surgeries
| Variable | Estimate | tValue | Probability |
|---|---|---|---|
| Intercept | -10.72 | -2.92 | 0.0035 |
| Elective surgery | -1.88 | -2.43 | 0.0150 |
| BMI | 0.12 | 3.21 | 0.0013 |
| History of cancer | 3.30 | 2.56 | 0.0104 |
| Charlson score* | -0.63 | -1.88 | 0.0597 |
| Emergency surgery | -1.31 | -1.45 | 0.1479 |
| History of MRSA | 3.02 | 3.57 | 0.0004 |
| No. of procedures | -1.31 | -1.99 | 0.0466 |
| No. of surgeons* | 1.07 | 2.14 | 0.0326 |
| Postop admission | 1.57 | 2.44 | 0.0149 |
| Postop glucose* | 0.01 | 0.96 | 0.3370 |
| Postop hemoglobin | -0.33 | -1.99 | 0.0471 |
| Preop albumin | 0.98 | 1.72 | 0.0863 |
| Preop glucose | 0.01 | 2.02 | 0.0437 |
| Preop stay | -0.45 | -1.36 | 0.1745 |
* Additional Intermountain risk factor.
Exhibit 57. Results of logistic regression using the validation dataset for only CABG surgeries.
| Variable | Estimate | tValue | Probability |
|---|---|---|---|
| Intercept | -3.96 | -1.18 | 0.2365 |
| Elective surgery | -0.21 | -0.35 | 0.7255 |
| BMI | 0.09 | 2.55 | 0.0109 |
| History of cancer@ | |||
| Charlson score* | -0.33 | -1.26 | 0.2071 |
| Emergency surgery | 1.08 | 1.83 | 0.0672 |
| History of MRSA | 0.91 | 0.94 | 0.3456 |
| No. of procedures | -0.22 | -0.46 | 0.6476 |
| No. of surgeons* | 0.50 | 0.65 | 0.5161 |
| Postop admission | 1.58 | 2.75 | 0.0059 |
| Postop glucose* | 0.00 | -0.44 | 0.6635 |
| Postop hemoglobin | -0.19 | -1.35 | 0.1782 |
| Preop albumin | -0.28 | -0.49 | 0.6246 |
| Preop glucose* | -0.01 | -0.84 | 0.3995 |
| Preop stay | 0.12 | 1.68 | 0.0923 |
@ No patients in this dataset with had the specific risk factor and no probability could be calculated.
* Additional Intermountain risk factor.
Exhibit 58. Results of logistic regression using the combined dataset for only CABG surgeries
| Variable | Estimate | tValue | Probability |
|---|---|---|---|
| Intercept | -7.42 | -3.28 | 0.0011 |
| Elective surgery | -0.53 | -1.18 | 0.2365 |
| BMI | 0.10 | 4.19 | 0.0000 |
| History of cancer | 1.60 | 1.71 | 0.0875 |
| Charlson score* | -0.45 | -2.48 | 0.0132 |
| Emergency surgery | 0.14 | 0.31 | 0.7555 |
| History of MRSA | 1.90 | 3.37 | 0.0008 |
| No. of procedures | -0.65 | -1.68 | 0.0920 |
| No. of surgeons* | 0.68 | 1.73 | 0.0831 |
| Postop admission | 1.50 | 3.71 | 0.0002 |
| Postop glucose* | 0.00 | 0.53 | 0.5975 |
| Postop hemoglobin | -0.24 | -2.35 | 0.0186 |
| Preop albumin | 0.28 | 0.72 | 0.4716 |
| Preop glucose* | 0.00 | 0.44 | 0.6570 |
| Preop stay | 0.10 | 1.37 | 0.1712 |
* Additional Intermountain risk factor.
