Table 3.
Postoperative complications of patients according to body mass index categories
| Underweight < 18.5 (n = 1315) | Normal BMI 18.5–24.9 (n = 46,209) |
Overweight 25–29.9 (n = 58,945) |
Obesity Class 1 30–34.9 (n = 46,687) |
Obesity Class 2 35–39.9 (n = 28,307) |
Obesity Class 3 ≥ 40.0 (n = 25,481) |
p value | |
|---|---|---|---|---|---|---|---|
| Any complication | 87 (6.6) | 2986 (6.5) | 3705 (6.3) | 3009 (6.4) | 2042 (7.2) | 2058 (8.1) | < 0.001 |
| Any major complication | 37 (2.8) | 1302 (2.8) | 1467 (2.5) | 1184 (2.5) | 743 (2.6) | 747 (2.9) | 0.001 |
| Any minor complication | 62 (4.7) | 1926 (4.2) | 2503 (4.2) | 2056 (4.4) | 1411 (5.0) | 1472 (5.8) | < 0.001 |
| Minor complication | |||||||
| Transfusion | 22 (1.7) | 519 (1.1) | 622 (1.1) | 454 (1.0) | 334 (1.2) | 313 (1.2) | 0.003 |
| Superficial surgical site infection | 15 (1.1) | 373 (0.8) | 542 (0.9) | 498 (1.1) | 397 (1.4) | 493 (1.9) | < 0.001 |
| Urinary tract infection | 24 (1.8) | 1041 (2.3) | 1348 (2.3) | 1116 (2.4) | 692 (2.4) | 676 (2.7) | 0.007 |
| Renal insufficiency | 1 (0.1) | 2 (0.0) | 4 (0.0) | 5 (0.0) | 0 (0.0) | 8 (0.0) | < 0.001 |
| Pneumonia | 0 (0.0) | 31 (0.1) | 54 (0.1) | 49 (0.1) | 38 (0.1) | 42 (0.2) | 0.001 |
| Major complication | |||||||
| Organ space surgical site infection | 19 (1.4) | 497 (1.1) | 609 (1.0) | 509 (1.1) | 342 (1.2) | 335 (1.3) | 0.004 |
| Deep incisional surgical site infection | 1 (0.1) | 65 (0.1) | 75 (0.1) | 54 (0.1) | 49 (0.2) | 44 (0.2) | 0.203 |
| Wound dehiscence | 2 (0.2) | 105 (0.2) | 110 (0.2) | 103 (0.2) | 51 (0.2) | 74 (0.3) | 0.048 |
| Pulmonary embolism | 0 (0.0) | 75 (0.2) | 105 (0.2) | 93 (0.2) | 55 (0.2) | 56 (0.2) | 0.290 |
| Cardiac arrest | 0 (0.0) | 6 (0.0) | 5 (0.0) | 9 (0.0) | 10 (0.0) | 4 (0.0) | 0.101 |
| Myocardial infarction | 0 (0.0) | 5 (0.0) | 16 (0.0) | 8 (0.0) | 8 (0.0) | 7 (0.0) | 0.404 |
| Cerebrovascular accident | 0 (0.0) | 8 (0.0) | 5 (0.0) | 5 (0.0) | 2 (0.0) | 6 (0.0) | 0.412 |
| Deep venous thromboembolism | 2 (0.2) | 52 (0.1) | 54 (0.1) | 56 (0.1) | 38 (0.1) | 35 (0.1) | 0.401 |
| Ventilation > 48 h | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | NA |
| Sepsis | 4 (0.3) | 133 (0.3) | 168 (0.3) | 160 (0.3) | 101 (0.4) | 117 (0.5) | 0.001 |
| Septic shock | 1 (0.1) | 12 (0.0) | 12 (0.0) | 13 (0.0) | 11 (0.0) | 15 (0.1) | 0.062 |
| Reoperation | 17 (1.3) | 661 (1.4) | 668 (1.1) | 505 (1.1) | 294 (1.0) | 263 (1.0) | < 0.001 |
| Reintubation | 0 (0.0) | 16 (0.0) | 17 (0.0) | 22 (0.0) | 20 (0.1) | 15 (0.1) | 0.059 |
| Progressive renal insufficiency | 1 (0.1) | 14 (0.0) | 20 (0.0) | 13 (0.0) | 8 (0.0) | 12 (0.0) | 0.704 |
| Death | 0 (0.0) | 5 (0.0) | 6 (0.0) | 6 (0.0) | 5 (0.0) | 6 (0.0) | 0.672 |
BMI, body mass index
Data are n (%)