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Table 1 The basic characteristics of enrolled studies

From: Meta-analysis of association between CT-based features and tumor spread through air spaces in lung adenocarcinoma

author

year

region

N(M/F)

year

STAS(+/−)

subtype

stage

Lobectomy/sublobar Resection

NOS

CT-based features

Kadota et al. [4]

2015

Japan

411 (164/247)

68

155/256

ADC

I

291/120

7

part-solid nodule.

Shiono et al. [15]

2016

Japan

318 (149/169)

70

47/271

ADC

I

202/116

5

pure solid nodule.

Dai et al. [10]

2017

China

383 (178/205)

60

116/267

ADC

I

364/19

6

radiological tumor size>2 cm.

Masai et al. [16]

2017

Japan

508 (248/260)

66

76/432

ADC

I

0/508

7

part-solid nodule.

Toyokawa et al. [17]

2018

Japan

327 (153/174)

69

191/136

ADC

I-IV

235/84

7

radiological tumor size>2 cm,pure solid nodule,part-solid nodule.

de Margerie-Mellon et al. [18]

2018

USA

80 (27/53)

68

40/40

ADC

NA

NA

6

radiological tumor size>2 cm, part-solid nodule.

Kim et al. [19]

2018

Republic of Korea

276 (129/147)

59

92/184

ADC

I-III

226/50

6

pure solid nodule, part-solid nodule.

Toyokawa et al. [20]

2018

Japan

82 (40/42)

71

31/51

ADC

I

0/82

7

radiological tumor size>2.0 cm.