Table 3.
Complications, Resource use, and Mortality by NHLBI body mass index groups
| Outcome Variable | NHLBI BMI Classification | P | ||||
|---|---|---|---|---|---|---|
| Underweight ≤18.4 kg/m2 N = 17 |
Normal 18.5–24.9 kg/m2 N = 652 |
Overweight 24.9–29.9 kg/m2 N = 1,075 |
Obese 30–39.9 kg/m2 N = 908 |
Extremely Obese ≥40 kg/m2 N = 142 |
||
| Any Complication | 9 (52.9) | 260 (39.9) | 448 (41.7) | 354 (39.0) | 70 (49.3) | 0.13 |
| Deep Sternal Wound | - | 2 (0.3) | 5 (0.5) | 10 (1.1) | 1 (0.7) | 0.31 |
| Stroke/Neurocognitive | 2 (11.8) | 21 (3.2) | 43 (4.0) | 22 (4.0) | 4 (2.8) | 0.10 |
| Reoperation | 1 (5.9) | 8 (1.2) | 17 (1.6) | 13 (1.4) | 1 (0.7) | 0.51 |
| Atrial Fibrillation | 1 (5.9) | 117 (17.9) | 208 (19.3) | 174 (19.2) | 43 (30.3) | 0.01 |
| GI Complication | 1 (5.9) | 10 (1.5) | 21 (2.0) | 22 (2.4) | 4 (2.8) | 0.53 |
| Pneumonia | 4 (23.5) | 19 (2.9) | 23 (2.1) | 25 (2.8) | 5 (3.5) | <0.001 |
| Prolonged Ventilation | 1 (5.9) | 50 (7.7) | 87 (8.1) | 66 (7.3) | 12 (8.5) | 0.96 |
| Dialysis | - | 5 (0.8) | 11 (1.0) | 11 (1.2) | 4 (2.8) | 0.31 |
| Renal Failure | - | 32 (4.9) | 48 (4.5) | 59 (6.5) | 15 (10.6) | 0.02 |
| Total ICU stay, hours | 59.2 (52.9) | 53.5 (109.1) | 47.2 (76.6) | 48.8 (90.2) | 58.0 (85.9) | 0.52 |
| Length of stay, days | 8.9 (2.7) | 8.8 (7.2) | 8.7 (8.0) | 9.2 (9.7) | 9.8 (8.2) | 0.50 |
| Surgery to Discharge, days | 5.9 (2.1) | 6.5 (6.6) | 6.4 (7.4) | 7.0 (9.3) | 7.5 (7.3) | 0.35 |
| 30D Readmission | 1 (5.9) | 53 (8.1) | 85 (7.9) | 88 (9.7) | 16 (11.3) | 0.46 |
| Major Complications | 2 (11.8) | 93 (14.3) | 158 (14.7) | 129 (14.2) | 27 (19.0) | 0.65 |
| Mortality | 2 (11.8) | 20 (3.1) | 40 (3.7) | 19 (2.1) | 3 (2.1) | 0.05 |
Data shown as n (%) or mean (SD), as appropriate
NHLBI, National Heart, Lung, and Blood Institute
BMI, Body mass index
TIA, Transient ischemic attack
MI, Myocardial infarction
GI, Gastrointestinal
MODS, Multi-organ dysfunction syndrome
ICU, Intensive care unit
30D, Thirty-day