Study population characteristics.
| Characteristic | 30-day Mortality Cohort, mean (SD) or % | 90-day Mortality Cohort mean (SD) or % |
|---|---|---|
| Mean age (SD), yrs | 67.4 (7.0) | 68.0 (6.8) |
| % Female | 52.8 | 61.3 |
| % Caucasian | 80.5 | 91.2 |
| % Osteoarthritis | 65.1 | 82.5 |
| Mean body mass index | 28.9 (1.6) | 28.1 (2.7) |