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Patients demographics and clinical characteristics
| Characteristics | No. (%) |
|---|---|
| Age at baseline, years | |
| Median | 63 |
| range | 34-83 |
| Sex | |
| Male | 15 (37.5) |
| Female | 25 (62.5) |
| M stage at diagnosis | |
| M0 | 3 (7.5) |
| M1a | 6 (15) |
| M1b | 31 (77.5) |
| EGFR mutation | |
| 19del | 19 (47.5) |
| L858R | 16 (40) |
| Others | 5 (12.5) |
| EGFR-TKI received | |
| Gefitinib | 2 (5) |
| Erlotinib | 9 (22.5) |
| Afatinib | 29 (72.5) |
