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Table 1 General characteristics of the enrolled studies

From: Sublobectomy versus Lobectomy for stage IA (T1a) non-small-cell lung cancer: a meta-analysis study

Study

Stage

Tumor size

Comparison

Outcome

Sample size

Sublobectomy

Lobectomy

Koike et al.[5]

Ia

≤2 cm

segmentectomy vs lobectomy

5-year survival

233

74

159

Okada et al.[9]

Ia

≤2 cm

sublobectomy vs lobectomy

5-year survival

567

305

262

Whitson et al.[21]

Ia

≤2 cm

segmentectomy vs lobectomy

5-year survival

5626

291

5335

Wolf et al.[18]

Ia

≤2 cm

sublobectomy vs lobectomy

5-year survival

238

154

84

Kates et al.[24]

Ia

≤1 cm

sublobectomy vs lobectomy

5-year survival

2064

688

1376

Okada et al.[23]

Ia

≤2 cm

segmentectomy vs lobectomy

5-year survival

209

70

139

Okami et al.[22]

Ia

≤2 cm

sublobectomy vs lobectomy

5-year survival

764

146

618

Warren and Faber [12]

Ia

≤2 cm

segmentectomy vs lobectomy

5-year survival

72

38

34

Wisnivesky et al.[20]

Ia

≤2 cm

sublobectomy vs lobectomy

5-year survival

1165

196

969

Wisnivesky et al.[19]

Ia

≤2 cm

sublobectomy vs lobectomy

5-year survival

249

47

202

Yendamuri et al. (1987-1997) [17]

Ia

≤2 cm

sublobectomy vs lobectomy

5-year survival

1961

469

1492

Yendamuri et al. (1998-2004) [17]

Ia

≤2 cm

segmentectomy vs lobectomy

5-year survival

2691

150

2541

Yendamuri et al. (2005-2008) [17]

Ia

≤2 cm

segmentectomy vs lobectomy

5-year survival

2761

162

2599

Zhong et al.[16]

Ia

≤2 cm

segmentectomy vs lobectomy

5-year survival

120

39

81

  1. The sublobectomy group did not distinguish between segmentectomy and wedge resection. In the study of Yendamuri et al. in 2013 [17], three groups of data in different time periods were compared.