Table 1 The clinical information of patients with lung adenocarcinoma (LUAD), training (Fudan) and validation (TCGA) cohorts

Fudan (training group)

 Age—year (no.)

  < 60 year

40

  ≥ 60 year

62

 Pathological_stage no

  IA

59

  IB

27

  IIIA

16

 Smoking status—no

  Former/current

31

  Never

71

 Tumor_size—no

  < 3 cm

70

  ≥ 3 cm

32

 Sex—no

  Male

49

  Female

53

 T—no

  T1a

40

  T1b

27

  T2a

33

  T2b

1

  T4

1

TCGA (validation group)

 Age—year (no.)

  < 60 year

87

  ≥ 60 year

240

 Stage—no

  I

168

  II

78

  III

60

  IV

21

 N—no

  N0/N1

208/67

  N2/N3

51/1

 Sex—no

  Male

160

  Female

167

 T—no

  T1

100

  T2

182

  T3

28

  T4

17

 M—no

  M0

306

  M1

21