Variable | KRAS wt (n = 284) | KRAS mt (n = 159) | p-value |
---|---|---|---|
Age (years) | 64.7 ± 12.0 | 63.3 ± 9.4 | 0.193 |
Gender | Â | Â | 0.108 |
 Male | 153 (53.9) | 73 (45.9) |  |
 Female | 131 (46.1) | 86 (54.1) |  |
Smoking status | |||
 Never smokers | 83 (29.2) | 7 (4.4) | < 0.001 |
 Ex-smokers | 99 (34.9) | 61 (38.4) | 0.461 |
 Current smokers | 102 (35.9) | 91 (57.2) | < 0.001 |
Clinical stage | |||
 I | 19 (6.7) | 11 (6.9) | 0.927 |
 II | 24 (8.5) | 10 (6.3) | 0.412 |
 III | 60 (21.1) | 38 (23.9) | 0.500 |
 IV | 181 (63.7) | 100 (62.9) | 0.860 |
T stage | |||
 T1 | 39 (13.7) | 26 (16.4) | 0.455 |
  T1a | 7 (2.5) | 2 (1.3) | 0.499 |
  T1b | 16 (5.6) | 11 (6.9) | 0.588 |
  T1c | 16 (5.6) | 13 (8.2) | 0.299 |
 T2 | 78 (27.5) | 30 (18.9) | 0.043 |
  T2a | 51 (18.0) | 18 (11.3) | 0.065 |
  T2b | 27 (9.5) | 12 (7.5) | 0.485 |
 T3 | 52 (18.3) | 37 (23.3) | 0.211 |
 T4 | 115 (40.5) | 66 (41.5) | 0.835 |
LN metastasis/−es | 212 (74.6) | 121 (76.1) | 0.734 |
N stage | |||
 N0 | 72 (25.4) | 38 (23.9) | 0.734 |
 N1 | 33 (11.6) | 27 (17.0) | 0.114 |
 N2 | 82 (28.9) | 48 (30.2) | 0.771 |
 N3 | 97 (34.2) | 46 (28.9) | 0.259 |
Extrathoracic metastasis/−es | 124 (43.7) | 74 (46.5) | 0.559 |
M stage | |||
 M0 | 101 (35.6) | 59 (37.1) | 0.746 |
 M1a | 59 (20.8) | 26 (16.4) | 0.257 |
 M1b | 37 (13.0) | 30 (18.9) | 0.100 |
 M1c | 87 (30.6) | 44 (27.7) | 0.512 |
Localization | |||
 Right upper lobe | 71 (25.0) | 44 (27.7) | 0.538 |
 Right lower lobe | 45 (15.8) | 17 (10.7) | 0.134 |
 Middle lobe | 11 (3.9) | 6 (3.8) | 0.958 |
 Left upper lobe | 52 (18.3) | 31 (19.5) | 0.759 |
 Left lower lobe | 33 (11.6) | 34 (21.4) | 0.006 |
 Lingula | 11 (3.9) | 3 (1.9) | 0.252 |
 Involvement of two lobes | 61 (21.5) | 24 (15.1) | 0.102 |
Distribution | |||
 Central | 64 (22.5) | 27 (17.0) | 0.165 |
 Peripheral | 189 (66.5) | 117 (73.6) | 0.124 |
 Central and peripheral | 31 (10.9) | 15 (9.4) | 0.624 |
Size (mm) | 45.8 ± 25.8 | 45.6 ± 25.8 | 0.937 |