Table 4.
Significance of preoperative measures of performance and functional status on perioperative adverse outcomes.
| Outcome | Model | C-Statistic | Increased ability to distinguish outcome beyond chance |
Pseudo- R2 |
AIC | LRT |
|---|---|---|---|---|---|---|
| Clavian IV complications |
Age | 0.594 | 18.8% | 0.0162 | 9,413.064 | 144.21 |
| Functional status | 0.519 | 3.8% | 0.0098 | 9,467.744 | 87.53 | |
| ASA | 0.620 | 24.0% | 0.0164 | 9,415.644 | 145.63 | |
| Modified frailty index | 0.610 | 22.0% | 0.0214 | 9,368.425 | 190.85 | |
| Combined functional indices | 0.670 | 34.0% | - | 9,148.331 | - | |
| Full model | 0.730 | - | - | 8,759.190 | - | |
| Wound complications |
Age | 0.516 | 3.2% | 0.0006 | 16,965.325 | 8.90 |
| Functional status | 0.503 | 0.6% | 0.0005 | 16,964.595 | 7.63 | |
| ASA | 0.592 | 18.4% | 0.0179 | 16,709.570 | 268.65 | |
| Modified frailty index | 0.557 | 11.4% | 0.0076 | 16,862.088 | 114.13 | |
| Combined functional indices | 0.616 | 23.2% | - | 16,662.320 | - | |
| Full model | 0.680 | - | - | 16,180.610 | - | |
| Any complication |
Age | 0.561 | 12.2% | 0.0083 | 23,304.586 | 163.9 |
| Functional status | 0.509 | 1.8% | 0.0042 | 23,384.079 | 82.41 | |
| ASA | 0.578 | 15.6% | 0.0150 | 23,175.429 | 297.06 | |
| Modified frailty index | 0.555 | 11.0% | 0.0082 | 23,307.873 | 162.62 | |
| Combined functional indices | 0.602 | 20.4% | - | 23,057.360 | - | |
| Full model | 0.629 | - | - | 27,748.430 | - |
*
Full model includes route of hysterectomy, age, race, BMI, ASA class, functional status, albumin, year of surgery, frailty index, and presence of preoperative conditions (diabetes mellitus, tobacco use, COPD, CHF, hypertension, bleeding disorders, disseminated cancer, weight loss, preoperative transfusion, and steroid use).
**
Combined functional indices includes age, functional status, ASA class, and frailty index
***
Increased ability to distinguish outcome beyond chance was calculated as (c-statistics-0.5)/0.5