The Ratio of Platelets to Lymphocytes Predicts the Prognosis of Metastatic Colorectal Cancer: A Review and Meta-Analysis

Table 1

Characteristics of studies included in the meta-analysis.

Study	Year	Country	Time	No.	TNM stage	Treatment	Follow-up (median)	Cutoff	Outcome	NOS
Neofytou	2014	UK	2005-2012	140	IV	None surgery	33 (1–103)	150	OS/DFS	8
Li	2015	China	2003-2012	110	IV	None surgery	NR	162	OS	7
Wu	2016	China	2008-2013	55	IV	None surgery	NR	150	OS/PFS	6
Peng	2017	China	2000-2012	150	IV	Surgery	36 (2–126)	150.17	OS/RFS	8
Ramos	2018	Spain	2003-2015	110	IV	None surgery	NR	172.4	OS/PFS	6
Mercier	2018	Canada	2008-2014	152	IV	None surgery	NR	330	OS/PFS	6
Jiang	2019	China	2010-2017	102	IV	None surgery	33.2 (2.6–94.5)	171.45	OS/PFS	7
Chang	2019	China	2012-2016	264	IV	None surgery	NR	173.48	OS	7
Matsuda	2020	Japan	2018-2019	21	IV	None surgery	13.1	193.2	OS/PFS	8
Yan	2020	China	1997-2013	103	IV	Surgery	55.4	144	OS	8
Erstad	2020	US	1995-2017	151	IV	Surgery	41.3 (2-186)	220	OS	8
Bulut	2021	Turkey	2010-2020	94	IV	None surgery	NR	180.36	OS/PFS	7