Association of body mass index with perioperative blood transfusion and short-term clinical outcomes in patients undergoing isolated coronary artery bypass grafting

Table 7 Post-hoc analysis of laboratory and clinical indicators during operation in different BMI groups in patients undergoing isolated CABG.

Variables	BMI<18.5 kg/m² (n = 130)	18.5 ≤ BMI < 24 kg/m² (n = 130)	MD (95%CI)	p value
Prealbumin (mg/L), mean ± SD	226.322 ± 46.06	237.76 ± 46.03	−11.438 (−22.684 ~−0.192)	0.046
Total protein (g/L), mean ± SD	68.44 ± 8.85	69.13 ± 6.77	−0.690 (−2.614 ~ 1.234)	0.447
Albumin (g/L), mean ± SD	41.47 ± 4.74	43.94 ± 4.08	−2.470 (−3.550~−1.390)	<0.001
Total cholesterol (mmol/L), mean ± SD	3.80 ± 1.20	3.90 ± 1.39	−0.100 (−0.417 ~ 0.217)	0.520
Albumin/globulin ratio, mean ± SD	1.64 ± 0.44	1.82 ± 0.39	−0.180 (−0.282~−0.078)	0.001
Pre-induction SBP (mmHg), mean ± SD	148.20 ± 23.64	146.35 ± 22.04	1.850 (−3.732 ~ 7.432)	0.515
Post-induction SBP (mmHg), mean ± SD	96.42 ± 15.04	112.02 ± 17.20	−15.600(−19.546~−11.654)	<0.001
SBP change rate (%), mean ± SD	34.31 ± 8.47	23.06 ± 8.14	11.250 (9.221 ~ 13.279)	<0.001

Abbreviations: BMI, body mass index; MD, mean difference; CI, confidence interval; SD, standard deviation; SBP, systolic blood pressure

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