Table 13. Basic information of each mutation type of EGFR.
| Clinicopathological features | Classification | EGFR mutation types | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Exon 2 | Exon 4 | Exon 6 | Exon 18 | Exon 19 | Exon 20 | Exon 21 | Exon 22 | Amplification | ||
| Gender | Male | 1 | 1 | 0 | 1 | 13 | 6 | 9 | 1 | 7 |
| Female | 0 | 0 | 1 | 0 | 12 | 6 | 10 | 0 | 6 | |
| Age | ≥60 | 1 | 1 | 0 | 1 | 11 | 5 | 8 | 1 | 6 |
| <60 | 0 | 0 | 1 | 0 | 14 | 7 | 11 | 0 | 7 | |
| TNM staging | IV | 1 | 1 | 1 | 0 | 25 | 12 | 16 | 1 | 11 |
| Non-IV | 0 | 0 | 0 | 1 | 0 | 0 | 3 | 0 | 2 | |
| Smoking history | Yes | 1 | 1 | 0 | 1 | 12 | 5 | 7 | 1 | 8 |
| No | 0 | 0 | 1 | 0 | 13 | 7 | 12 | 0 | 5 | |
| Pathological type | ADC | 1 | 1 | 1 | 0 | 25 | 12 | 19 | 1 | 12 |
| SCC | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | |
ADC, adenocarcinoma; SCC, squamous cell carcinoma.