Table 1.

Summary of results.

Year	First author	Country	Study design	Patients (n)	Age median	NOS	Cut off value NLR
2018	Zhang LX	China	R	904	N/A	7	2
2016	Pang W	China	R	927	63	7	1.59
2017	Song S	China	P	1990	62	5	2.10
2015	Yu L	China	R	291	N/A	8	3.5
2015	Kim EY	S. Korea	P	1986	58.2	6	3
2014	Jiang N	China	R	377	64	6	1.44
2015	Hsu JT	Taiwan	R	1030	N/A	6	3.44
2010	Ubukata H	Japan	R	157	65	6	5
2010	Shimada H	Japan	R	1028	65	5	4
2018	Zhang Y	China	P	182	65	7	2.88
2018	Mori M	Japan	R	100	66	6	1
2019	Kosuga T	Japan	R	429	67	7	1.6
		9401

NLR = neutrophil to lymphocyte ratio, NOS = Newcastle Ottawa Scale, P = prospective, R = retrospective.