Table 2.

Predictive value of NLR for postoperative infectious complications in all studies.

Author (year)	TP	FP	FN	TN	Sensitivity 95% (CI)	Specificity (95% CI)	AUC	Cut-off value
Bolat 2017 [6]	12	1	6	134	0.67 (0.41–0.87)	0.99 (0.96–1.00)	0.91	6.20
Inose 2019 [7]	7	62	3	170	0.70 (0.35–0.93)	0.73 (0.67–0.79)	0.69	3.87
Liu YC 2019 [26]	19	135	1	143	0.95 (0.75–1.00)	0.51 (0.45–0.57)	0.71	2.13
Shen CJ 2019 [8]	9	104	4	176	0.69 (0.39–0.91)	0.63 (0.57–0.69)	0.66	3.85
Hani SM 2020 [14]	14	70	6	93	0.70 (0.46–0.88)	0.57 (0.49–0.65)	NR	4.56
Inose 2020 [27]	6	55	1	192	0.86 (0.42–1.00)	0.78 (0.72–0.83)	0.80	3.21
Rotem 2020 [11]	81	85	32	139	0.72 (0.62–0.80)	0.62 (0.55–0.68)	0.67	6.80
Yao S 2020 [12]	10	13	5	77	0.67 (0.38–0.88)	0.85 (0.77–0.92)	0.80	11.10
Zhao G 2020 [28]	22	8	4	70	0.85 (0.65–0.96)	0.90 (0.81–0.95)	0.93	2.77
Imabayashi 2021 [29]	6	48	3	272	0.67 (0.30–0.93)	0.85 (0.81–0.89)	0.77	4.50
Zhuo YY 2021 [10]	38	338	1	800	0.97 (0.87–1.00)	0.70 (0.68–0.73)	0.88	2.44
Lu K 2022 [9]	10	180	14	696	0.42 (0.22–0.63)	0.79 (0.77–0.82)	NR	6.40

NLR neutrophil-lymphocyte ratio, TP True-positive, FP False-positive, FN False-negative, TP True-negative, AUC the area under curve, NR not reported.