Unadjusted rates of postoperative 30-day complication by nutritional profile group
| Postoperative 30-day complications | Underweight short n=656 | Overweight short n=733 | Underweight tall n=252 | Overweight tall n=1534 | Normal n=26 862 | P values* |
| Surgical-site infection | 13 (2.0) | 34 (4.6) | 6 (2.4) | 41 (2.7) | 913 (3.4) | 0.31 |
| Postoperative sepsis | 16 (2.4) | 6 (0.8) | 1 (0.4) | 26 (1.7) | 224 (0.8) | 0.0002 |
| Return to operating room | 32 (4.9) | 39 (5.3) | 5 (2.0) | 64 (4.2) | 769 (2.9) | <0.0001 |
| Dehiscence | 4 (0.6) | 6 (0.8) | 3 (1.2) | 10 (0.7) | 111 (0.4) | 0.03 |
| Transfusion within 72 hours | 16 (2.4) | 7 (1.0) | 3 (1.2) | 19 (1.2) | 162 (0.6) | <0.0001 |
| Reintubation | 16 (2.4) | 5 (0.7) | 3 (1.2) | 7 (0.5) | 106 (0.4) | <0.0001 |
| Acute renal failure | 2 (0.3) | 2 (0.3) | 0 (0) | 3 (0.2) | 34 (0.1) | 0.18 |
| Central line-associated infection | 3 (0.5) | 1 (0.1) | 0 | 6 (0.4) | 51 (0.2) | 0.24 |
| Pneumonia | 8 (1.2) | 7 (1.0) | 2 (0.8) | 7 (0.5) | 135 (0.5) | 0.01 |
| Cardiac arrest | 3 (0.5) | 1 (0.1) | 1 (0.4) | 5 (0.3) | 35 (0.1) | 0.02 |
| Deep vein thrombosis | 1 (0.2) | 1 (0.1) | 1 (0.4) | 4 (0.3) | 56 (0.2) | 0.82 |
| Urinary tract infections | 4 (0.6) | 5 (0.7) | 0 (0) | 11 (0.7) | 155 (0.6) | 0.84 |
| Mortality | 4 (0.6) | 3 (0.4) | 1 (0.4) | 5 (0.3) | 51 (0.2) | 0.005 |
| Composite 30-day morbidity | 66 (10.1) | 61 (8.3) | 20 (7.9) | 107 (7.0) | 1634 (6.1) | <0.0001 |
| Healthcare-associated infections | 34 (5.2) | 46 (6.3) | 9 (3.6) | 79 (5.2) | 1287 (4.8) | 0.18 |
| Reintervention events | 48 (7.3) | 43 (5.9) | 8 (3.2) | 71 (4.6) | 881 (3.3) | <0.0001 |
*Derived from a χ2 test comparing complications among nutritional profile group.