Table 3.
Postoperative Outcome within 30 Days
| Normal weight | Underweight | Overweight | Obese | p value | |
|---|---|---|---|---|---|
| BMI 18.5–25(kg/m2) | BMI < 18.5(kg/m2) | BMI 25–30(kg/m2) | BMI > 30(kg/m2) | ||
| (N = 1815) | (N = 100) | (N = 1635) | (N = 743) | ||
| Wound infection | 87 (4.8 %) | 11 (11.0 %)a | 127 (7.8 %)a | 81 (10.9 %)a | P < 0.001 |
| Pneumonia | 31 (1.7 %) | 4 (4.0 %) | 41 (2.5 %) | 16 (2.2 %) | P = 0.231 |
| Deep vein thrombosis and/or pulmonary embolism | 7 (0.4 %) | 1 (1.0 %) | 5 (0.3 %) | 5 (0.7 %) | P = 0.474 |
| ICU admission | 232 (12.8 %) | 27 (27.0 %)a | 198 (12.1 %) | 95 (12.8 %) | P < 0.001 |
| Reoperation | 87 (4.8 %) | 11 (11.0 %)a | 72 (4.4 %) | 39 (5.2 %) | P = 0.028 |
| Readmission | 57 (3.1 %) | 5 (5.0 %) | 67 (4.1 %) | 34 (4.6 %) | P = 0.246 |
| Length of hospital stay (days) (median + IQR) | 3 (1–8) | 7 (3–16) a | 2 (1–7) a | 2 (1–7) | P < 0.001 |
| Operation time (minutes) (median + IQR) | 39 (24–65) | 41 (27–90) | 41 (26–66) | 50 (27–80) a | P < 0.001 |
| Blood loss (mL)b (median + IQR) | 10 (5–50) | 25 (5–138) a | 15 (5–50) | 20 (10–100) a | P < 0.001 |
| 30 days mortality | 27 (1.5 %) | 4 (4.0 %) | 11 (0.7 %)a | 10 (1.3 %) | P = 0.008 |
| Cardiovascular complication | 67 (3.7 %) | 4 (4.0 %) | 53 (3.2 %) | 26 (3.5 %) | P = 0.897 |
| Any complication | 339 (18.7 %) | 28 (28.0 %) | 345 (21.1 %) | 185 (24.9 %) | P = 0.001 |
aSignificantly different (p < .05) compared to normal weight
bData was available in 84.3 % of patients