Association between neutrophil-to-lymphocyte ratio and major postoperative complications after carotid endarterectomy: A retrospective cohort study

Table 4 Correlation between neutrophil to lymphocyte ratio within 24 h after carotid endarterectomy and major postoperative complications

Exposure factors	Unadjusted	P value	Model I	P value	Model II	P
NLR	1.09 (1.01, 1.17)	0.026a	1.08 (1.00, 1.16)	0.041a	1.15 (1.03, 1.29)	0.014a
NLR tertile groups
Low NLR group	1.0		1.0		1.0
Middle NLR group	1.60 (0.63, 4.09)	0.322	1.52 (0.59, 3.92)	0.386	3.99 (1.03, 15.49)	0.046a
High NLR group	2.92 (1.21, 7.02)	0.017a	2.88 (1.17, 7.09)	0.022a	8.47 (2.20, 32.63)	0.002a

^aP < 0.05.

Model I-adjusted variables: Sex and age; Model II-adjusted variables: Sex, age, BMI, ASA grade, preoperative combined heart disease, anesthesia method, degree of stenosis on the surgical side, degree of stenosis on the contralateral side, operating time, intraoperative intake and output volume, duration of carotid artery occlusion, CV_SBP, and CV_DBP. ASA: American society of anesthesiologists; BMI: Body mass index; CEA: Carotid endarterectomy; CV_DBP: Coefficient of variation in diastolic blood pressure; CV_SBP: Coefficient of variation in systolic blood pressure; NLR: Neutrophil to lymphocyte ratio.