Table 1:
Characteristics of training and testing cohorts.
| Training | Testing | ||
|---|---|---|---|
| Date ranges | June 2014-Feb 2018 (n=40560) |
March 2018-Feb 2019 (n=11969) |
|
| Average age (years) | 56.5 | 57.5 | |
| Ethnicity, n (%) | Not Hispanic | 38116 (93.9) | 11210 (93.6) |
| Hispanic | 1772 (4.4) | 599 (5) | |
| Missing | 717 (1.8) | 171 (1.4) | |
| Race, n (%) | White | 31399 (77.3) | 9376 (78.3) |
| African American | 6136 (15.1) | 1739 (14.5) | |
| Other | 2483 (6.1) | 702 (5.9) | |
| Missing | 587 (1.5) | 163 (1.4) | |
| Gender, n (%) | Male | 20614 (50.8) | 6072 (50.7) |
| Female | 19991 (49.2) | 5908 (49.3) | |
| Primary Insurance, n (%) | Medicare | 18581 (45.8) | 5774 (48.2) |
| Private | 12463 (30.7) | 3308 (27.6) | |
| Medicaid | 6577 (16.2) | 1928 (16.1) | |
| Uninsured | 2984 (7.4) | 970 (8.1) | |
| Outcomes, n (%) | ICU Stay > 48 hours | 10355 (25.5) | 3408 (28.5) |
| MV Duration > 48 hours | 2372 (5.9) | 767 (6.4) | |
| Neurological Complications and Delirium | 5860 (14.5) | 2364 (19.8) | |
| Acute Kidney Injury | 6098 (15) | 2111 (17.6) | |
| Cardiovascular Complication | 5866 (14.5) | 2240 (18.7) | |
| Venous Thromboembolism | 2283 (5.6) | 943 (7.9) | |
| Wound | 7548 (18.6) | 3044 (25.4) | |
| Hospital Mortalitya | 192 (2.3) | 93 (2.6) |
a
Models for hospital mortality were developed using 8,378 surgeries and validated using 3,591surgeries among 11,969 surgeries in the test cohort.