Table 1.
Clinical and pathological patient characteristics
| Patients (N) | EGFR mut + (N) | EGFR mut + (%) | |
|---|---|---|---|
| Total group | 297 | 32 | 11 |
| Gender | |||
| Female | 113 | 26 | 23 |
| Male | 184 | 6 | 3 |
| Age | |||
| <60 | 80 | 7 | 9 |
| 60-70 | 99 | 10 | 10 |
| >70 | 118 | 15 | 13 |
| Smoking | |||
| Never | 40 | 16 | 40 |
| Former | 109 | 8 | 7 |
| Current | 99 | 7 | 7 |
| Missing | 49 | 1 | - |
| Specimen | |||
| Cytology | 84 | 8 | 10 |
| Biopsy | 213 | 24 | 11 |
| Tumour histology | |||
| Adeno | 274 | 31 | 11 |
| NSCLC-NOS | 9 | 1 | 11 |
| Squamous | 14 | 0 | 0 |
| EGFR IHC | |||
| Positive | 254 | 29 | 12 |
| Negative | 9 | 0 | 0 |
| Missing | 34 | 3 | - |
| TTF-1 IHC | |||
| Positive | 171 | 29 | 17 |
| Negative | 45 | 1 | 2 |
| Missing | 81 | 2 | - |
EGFR mut+: presence of activating EGFR mutation; N: number; NSCLC-NOS: non-small cell lung cancer not otherwise specified; IHC: immunohistochemistry; TTF-1: thyroid transcription factor 1.