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Table 1 Characteristics of studies included in meta-analysis

From: Predictive model for the probability of malignancy in solitary pulmonary nodules: a meta-analysis

Studies

Year

Design

Blind

Sample size

M/B

Reference standard

PET/CT

Tumor markers

Cao [11]

2021

Retrospective

Unclear

80

55/25

S

No

Yes

Chen [12]

2020

Retrospective

Unclear

216

160/56

S

No

No

Chen [13]

2016

Retrospective

Unclear

289

207/82

S

No

No

Chen [14]

2013

Retrospective

Unclear

109

67/42

S, B

Yes

No

Cheng [15]

2019

Retrospective

Unclear

362

291/71

S, B

Yes

No

Dong [16]

2014

Retrospective

Unclear

1679

1296/383

S, B

No

Yes

Hu [17]

2016

Retrospective

Yes

112

82/30

S

No

No

Lin [18]

2015

Retrospective

Yes

186

123/63

S, B

Yes

No

Ma [19]

2020

Retrospective

Unclear

161

131/30

S, B

Yes

No

Tian [20]

2012

Retrospective

Unclear

105

61/44

S, B

Yes

No

Wang [21]

2018

Retrospective

Yes

268

156/112

S

No

No

Xiang [22]

2016

Retrospective

Yes

110

80/30

S

Yes

Yes

Xiao [23]

2019

Retrospective

Unclear

242

209/33

S, B

No

Yes

Xu [24]

2020

Retrospective

Unclear

160

122/38

S

Yes

Yes

Yang [25]

2012

Retrospective

Unclear

145

98/47

S

No

No

Yu [26]

2016

Retrospective

Unclear

139

73/66

S

No

No

Zhang [27]

2015

Retrospective

Unclear

120

72/48

S, B

No

Yes

Zhang [28]

2016

Retrospective

Unclear

270

110/160

S

No

No

Zhao [29]

2021

Retrospective

Yes

250

156/94

S, B

No

Yes

Zhong [30]

2017

Retrospective

Unclear

168

113/55

S, B

No

No

  1. M: malignant; B: benign; S: surgery; B: biopsy; PET/CT: positron emission tomography/computed tomography