Table 4.
Relative Feature Importance for Complications or Readmission Following Primary aTSA.
| Feature | Rank in XGBoost (Rank in Logistic Regression) |
Change to Risk Prediction |
|---|---|---|
| Binary features | ||
| Complication of implants | 1 (1) | 0.0297 |
| Chronic kidney disease, severe | 2 (23) | 0.0117 |
| Teaching Hospital | 3 (63) | 0.0111 |
| Coronary atherosclerosis | 4 (2) | 0.0076 |
| Male sex | 5 (64) | 0.0070 |
| Dimentia without complications | 6 (21) | 0.0060 |
| Other circulatory diseases | 7 (14) | 0.0059 |
| Osteoarthritis of hip or knee | 8 (31) | −0.0058 |
| Osteoporosis | 9 (3) | 0.0051 |
| Morbid Obesity | 10 (18) | −0.0029 |
| Continuous features | ||
| Number of medical comorbidities | 1 (1) | 0.0650 |
| Age | 2 (3) | 0.0278 |
| Hospital volume | 3 (2) | −0.0101 |
| Insurance status | ||
| Medicare | Reference | 0 |
| Private | 1 (1) | −0098 |
| Medical | 2 (2) | 0.0051 |
| Workers Comp | 3 (3) | −0.0008 |
| Other | 3 (4) | −0.0008 |
| Race | ||
| White | Reference | 0 |
| Asian/Pacific Islander | 1 (2) | −0.0312 |
| Black | 2 (1) | 0.0124 |
| Other | 3 (4) | 0.0002 |
| Native American | 4 (3) | 5.02E-05 |
| Unknown | 4 (5) | 5.02E-05 |