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

Table 5 Comparison of transfusion utilization between different BMI groups in off-pump CABG surgery

Variables	PSM				Logistic
Variables	BMI<18.5 kg/m² (n = 69)	18.5 ≤ BMI < 24 kg/m² (n = 69)	MD or OR (95%CI)	p value	BMI<18.5 kg/m2 (n = 69)	18.5 ≤ BMI < 24 kg/m² (n = 3905 )	OR (95%CI)	p value
Transfusion requirement (quantity if used and percentage of usage)
Red blood cell (u), mean ± SD	1.26 ± 1.97	0.44 ± 1.08	0.826 (0.291 ~ 1.362)	0.003	1.26 ± 1.97	0.71 ± 2.07	/	/
n (%)	27 (39.1)	11 (15.9)	3.630 (1.326 ~ 9.937)	0.012	27 (39.1)	504 (12.9)	3.156 (1.875 ~ 5.313)	<0.001
Plasma (mL), mean ± SD	86.96 ± 287.95	46.38 ± 146.11	40.580 (-36.534 ~ 117.693)	0.299	86.96 ± 287.95	82.38 ± 237.164	/	/
n (%)	10 (14.5)	7 (10.1)	1.201 (0.036 ~ 4.228)	0.778	10 (14.5)	492 (12.6)	1.334 (0.674 ~ 2.641)	0.048
Platelets (u), mean ± SD	0.07 ± 0.40	0 ± 0	0.072 (-0.023~-0.167)	0.133	0.07 ± 0.40	0.02 ± 0.25	/	/
n (%)	3 (4.3)	0 (0)	/	/	3 (4.3)	40 (1.0)	4.028 (1.135 ~ 14.303)	0.031
Any, n (%)	29 (42.0)	16 (23.2)	2.462 (0.955 ~ 6.349)	0.062	29 (42.0)	812 (20.8)	2.261 (1.383 ~ 3.696)	0.001

Abbreviations: PSM, propensity score matching; BMI, body mass index; MD, mean difference; OR, odds ratio; CI, confidence interval; SD, standard deviation

ISSN: 1471-2253