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Table 2 Clinicopathologic parameters of the studies included in this meta-analysis

From: Clinicopathological and prognostic significance of programmed death ligand-1 expression in breast cancer: a meta-analysis

Study

Race

Age

Tumor size (2 cm ≤)

Tumor size (>2 cm)

HG1

HG2

HG3

LN (−)

LN (+)

ER (+)

ER (−)

PR (+)

PR (−)

HER-2 (+)

HER-2 (−)

KI-67 ≤ 14

KI-67 > 14

Qin T (2015)

Eastern Asian

median 47 (21-84)

282

57

37

338

495

427

443

630

240

617

253

18

852

123

440

Baptista M (2016)

N/A

N/A

57

132

33a

136

62

127

94

83

89

88

25

150

N/A

N/A

Ali HR (2015)

N/A

N/A

2739

2741

896

2270

2101

2823

2527

3086

1298

N/A

N/A

672

3805

N/A

N/A

Muenst S (2014)

N/A

median 64 (27-101)

181

469

143

259

248

355

294

457

191

N/A

N/A

129

519

118

525

Park IH (2016)

N/A

median 47 (28-78)

191

125

N/A

N/A

N/A

199

117

HRb (+) 176

HRb (−) 140

HRb (+) 176

HRb (−) 140

102

209

155

157

  1. HG histologic grade, LN lymph node metastasis, N/A not applicable, HR hormonal receptor
  2. aThe histologic grade was classified as 1/2 and 3 in the study
  3. bHormonal receptor (+) was defined as ER (+) or PR (+) and hormonal receptor (−) was defined as ER (−) and PR (−) in the study