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Table 1 Characteristics of included studies

From: Prognostic role of neutrophil-to-lymphocyte ratio in breast cancer: a systematic review and meta-analysis

Study Year Number of patients Disease stage NLR cutoff value
Overall survival
 Azab et al. [23]a 2012 316 Mixed 3.3
 Azab et al. [13]a 2013 437 Mixed 3.3
 Bozkurt et al. [24] 2015 85 Early 2.0
 Dirican et al. [25] 2015 1527 Mixed 4.0
 Forget et al. [10] 2014 720 Early 3.3
 Jia et al. [14] 2015 1570 Early 2.0
 Koh et al. [8] 2014 157 Early 2.3
 Koh et al. [15] 2015 1435 Mixed 5.0
 Nakano et al. [9] 2015 167 Early 2.5
 Noh et al. [26]a 2013 442 Early 2.5
 Pistelli et al. [27] 2015 90 Early 3.0
 Rimando et al. [28] 2016 461 Mixed 3.8
 Yao et al. [11] 2014 608 Early 2.6
Disease-free survival
 Asano et al. [12] 2016 61 Early 3.0
 Bozkurt et al. [24] 2015 85 Early 2.0
 Dirican et al. [25] 2015 1527 Mixed 4.0
 Forget et al. [10] 2014 720 Early 3.3
 Hong et al. [29] 2015 487 Early 1.9
 Jia et al. [14] 2015 1570 Early 2.0
 Koh et al. [8] 2014 157 Early 2.3
 Nakano et al. [9] 2015 167 Early 2.5
 Pistelli et al. [27] 2015 90 Early 3.0
  1. NLR neutrophil-to-lymphocyte
  2. aIncluded in previous meta-analysis [4]