Neutrophil-to-Lymphocyte Ratio Is a Potential Prognostic Biomarker in Patients with Ovarian Cancer: A Meta-Analysis

Table 1

Characteristics of the included studies.

Study	Country	Ethnicity	Sample size	Cut-off	Therapy	Progression-free survival	Overall survival
Cho et al. 2009 [14]	South Korea	Asian	192	2.6	Operation		8.42 [1.09, 65.04]	7
Thavaramara et al. 2011 [16]	Thailand	Asian	129	2.6	Operation	0.70 [0.35, 1.40]	0.70 [0.31, 1.60]	6
Asher et al. 2011 [15]	United Kingdom	Caucasian	235	4.0	Operation		0.87 [0.52, 1.44]	6
Williams et al. 2014 [17]	United States	Caucasian	519		Operation		1.43 [1.13, 1.81]	6
Wang et al. 2015 [18]	China	Asian	126		Chemotherapy	2.26 [1.34, 3.81]	3.25 [1.74, 6.08]	8
Zhang et al. 2015 [19]	China	Asian	190	3.4	Chemotherapy	0.50 [0.36, 0.68]	0.46 [0.33, 0.65]	6
Miao et al. 2016 [22]	China	Asian	344	3.02	Chemotherapy	1.73 [1.23, 2.45]	1.62 [1.14, 2.29]	6
Kim et al. 2016 [21]	South Korea	Asian	109	2.8	Operation	2.04 [1.01, 4.12]	3.45 [1.47, 8.10]	6
Nakamura et al. 2016 [23]	Japan	Asian	30	3.91	Chemotherapy		14.13 [1.21, 165.36]	6
Wang et al. 2016 [24]	China	Asian	143	3.43	Operation	2.20 [1.03, 4.70]	3.37 [1.39, 8.15]	6
Feng et al. 2016 [20]	China	Asian	875	3.24	Operation	1.25 [1.05, 1.49]	1.19 [0.94, 1.50]	8

, not reported; , Newcastle-Ottawa Scale.