Characteristic | EGFR mutation [cases (%)] | P | |
---|---|---|---|
Negative | Positive | ||
Total | 328 (67.4) | 159 (32.6) | Â |
Age | |||
 ≤58 years | 187 (57.0) | 74 (46.5) | 0.030 |
 >58 years | 141 (43.0) | 85 (53.5) |  |
Sex | |||
 Male | 231 (70.4) | 72 (45.3) | <0.001 |
 Female | 97 (29.6) | 87 (54.7) |  |
Histological type | |||
 Adenocarcinoma | 226 (68.9) | 156 (98.1) | <0.001 |
 Others | 102 (31.1) | 3 (1.9) |  |
Differentiation | |||
 Well | 118 (36.0) | 88 (55.3) | <0.001 |
 Poor | 210 (64.0) | 71 (44.7) |  |
Clinical stage | |||
 I + II | 153 (46.6) | 73 (45.9) | 0.879 |
 III + IV | 175 (53.4) | 86 (54.1) |  |
Smoking history | |||
 Non-smoker | 130 (39.6) | 109 (68.6) | <0.001 |
 Smoker | 198 (60.4) | 50 (31.4) |  |