Table 3.
Outcomes by BMI Strata
| Outcome | Normal/Overweight (BMI 18.5–30) n=8051 | Obese (BMI 30–40) n=4797 | Morbidly Obese (BMI >40) n=789 |
|---|---|---|---|
| Stroke | 137 (1.7%) | 67 (1.8%) | 14 (1.8%) |
| Renal failure | 249 (3.1%) | 206 (4.3%)a | 54 (6.8%)a |
| w/Hemodialysis | 115 (1.5%) | 98 (2.0%)a | 28 (3.5%)a |
| DSWI | 16 (0.2%) | 19 (0.4%)a | 10 (1.3%) a |
| MI | 228 (2.9%) | 112 (2.3%) | 36 (4.6%) |
| AF | 1769 (22.3%) | 1090 (22.7%) | 193 (24.5%) |
| Prolonged ventilation | 843 (10.6%) | 584 (12.2%)a | 133 (16.9%)a |
| Pneumonia | 241 (3.0%) | 149 (3.1%) | 34 (4.3%)a |
| Composite major morbidity | 1197 (15%) | 809 (16.9%)a | 175 (22.2%)a |
| ICU LOS | 46 (25, 76) | 47 (25, 80) | 50 (27, 98)a |
| Hospital LOS in days | 6.1 (4, 8) | 6.4 (4, 8)a | 6.4 (5, 9)a |
| Mortality | 228 (2.9%) | 112 (2.3%) | 36 (4.6%)a |
| Total hospital cost ($) | 35 866 (28 341, 48 117) | 36 209 (27 846, 48 353) | 39 684a (30 378, 54 910) |
Composite major morbidity includes stroke, renal failure, DSWI, MI, AF, prolonged ventilation, pneumonia. All continuous variables are presented as median and 25% and 75% percentiles. AF indicates atrial fibrillation; BMI, body mass index; DSWI, deep sternal wound infection; ICU LOS, intensive care unit length of stay; MI, myocardial infarction.
a
P<0.05 compared to normal.