Table 2. Postoperative outcome parameters by subgroup of body mass index (mean ± SD).
| Variable | BMI | p | ||
|---|---|---|---|---|
| <24 kg/m2 | 24–28 kg/m2 | >28 kg/m2 | ||
| (n = 323) | (n = 493) | (n = 191) | ||
| Surgery time (min) | 236. ± 87.5 | 233 ± 74.5 | 236 ± 55.6 | 0.257 |
| Fluid input (mL/kg) | 17.3 ± 8.01 | 14.1 ± 7.14* | 12.8 ± 6.23*# | <0.01 |
| Transfusion (mL/kg) | 1.69 ± 6.99 | 0.55 ± 2.60* | 0.24 ± 1.46* | <0.01 |
| Bleeding (mL/kg) | 5.04 ± 1.89 | 4.37 ± 1.28* | 4.07 ± 1.13*# | <0.01 |
| RBC (1012/L) | 3.43 ± 0.50 | 3.49 ± 0.46 | 3.59 ± 0.53 | 0.419 |
| Hb (g/L) | 103 ± 15.48 | 106 ± 13.65* | 108 ± 15.2* | <0.01 |
| PLT (109/L) | 121 ± 48.5 | 127.69 ± 45.77* | 140.45 ± 45.86*# | <0.01 |
| Glucose (mmol/L) | 7.19 ± 2.46 | 7.22 ± 2.12 | 7.60 ± 2.25 | 0.91 |
| Chest tube drainage (ml/kg) | 13.6 ± 7.92 | 10.42 ± 4.87* | 8.43 ± 3.96*# | <0.01 |
| ICU stay (min) | 3932 ± 4330 | 3279 ± 2924* | 3265 ± 3726* | 0.025 |
| Ventilation time (h) | 25.6 ± 54.2 | 9.76 ± 22.5 | 18.7 ± 13.2 | <0.01 |
| Reoperation (%) | 4 (1.2%) | 3 (0.6%) | 0 | 0.052 |
| Total blood loss (mL) | 298 ± 93.2 | 315 ± 87.3* | 338 ± 103.7*# | <0.01 |
*Indicating a difference on comparison with BMI: <24 kg/m2 with p <0.05; #Indicating a difference on comparison with BMI: 24–28 kg/m2 with p <0.05. RBC: red blood cell; Hb: hemoglobin; PLT: platelet; BMI: body mass index; ICU: intensive care unit