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

Table 5 Outcome variables, stratified by NLR ratio tertile groups

	Total	Low NLR group	Middle NLR group	High NLR group	P
No. of cases	206	68	69	69
Major postoperative complications	40 (19.42%)	8 (11.76%)	11 (15.94%)	21 (30.43%)	0.015a
Neurological complications	16 (7.77%)	4 (5.88%)	4 (5.80%)	8 (11.59%)	0.346
Cardiac complications	6 (2.91%)	0 (0.00%)	3 (4.35%)	3 (4.35%)	0.218
Respiratory complications	14 (6.80%)	2 (2.94%)	5 (7.25%)	7 (10.14%)	0.242
AKI	9 (4.37%)	2 (2.94%)	1 (1.45%)	6 (8.70%)	0.089
Fever	10 (4.85%)	1 (1.47%)	2 (2.90%)	7 (10.14%)	0.040a
Surgical site infections	3 (1.46%)	1 (1.47%)	1 (1.45%)	1 (1.45%)	1.000
Urinary infections	3 (1.46%)	0 (0.00%)	1 (1.45%)	2 (2.90%)	0.367
DVT	5 (2.43%)	2 (2.94%)	1 (1.45%)	1 (1.45%)	0.766
Length of stay in the ICU (d)	1.0 (0–1.0)	1.0 (0–1.0)	1.0 (0–1.0)	1.0 (1.0–1.0)	0.079
Hospitalization stay (d)	15.56 ± 4.30	15.44 ± 4.40	15.28 ± 4.27	15.96 ± 4.26	0.627
Cost of hospitalization (CNY)	26886.26 ± 11277.49	24371.70 ± 5233.73	26837.07 ± 12681.34	29413.56 ± 13520.49	0.032a

^aStatistically significant difference was observed between the groups.

AKI: Acute kidney injury; CEA: Carotid endarterectomy; CNY: Chinese Yuan; DVT: Deep venous thrombosis; ICU: Intensive care unit; NLR: Neutrophil-to-lymphocyte ratio.