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Table 1 The characteristics and evaluation index of the included studies

From: Survival after lobectomy versus sub-lobar resection in elderly with stage I NSCLC: a meta-analysis

Study

Year

Design

Country

Mean age(L/S)

Gender(M/F)

NO(L/S)

NO(W/Se)

5-y Survival %(L/S)

Assessment

Score

Okami [26]

2010

OC

Japan

77/78

84/59

79/54

21/33

74.3/67.6

20

Richard [20]

2013

OC

UK

72/70

NR

375/158

158/0

58.7/55.1

18

Zhang [42]

2012

OC

China

83.6

39/13

32/20

16/4

21.5/18.7

17

Lin [41]

2013

OC

China

73/74

29/18

33/14

14/0

NR

19

Andrea [30]

2013

OC

Italy

78.1

257/62

202/71

NR

40.0/38.0

15

Liu [4]

2014

OC

China

≥70

96/71

122/45

NR

63.4/60.9

14

  1. OC Observational cohort, L Lobectomy, S Sub-Lobar Resection, NR Not reported, W Wedge resection, Se Segmentectomy, M Male, F Female