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The clinical characteristics of lung squamous cell carcinoma with sensitizing EGFR mutations (n = 38)
| Characteristics | No. | Present, % |
| Age, y | ||
| Median (range) | 67 (39–84) | |
| Sex | ||
| Male | 31 | 81.6 |
| Female | 7 | 18.4 |
| Smoking status | ||
| Never/light* | 5 | 13.2 |
| Former/current | 33 | 86.8 |
| EGFR mutation status | ||
| 19del | 22 | 57.9 |
| 21L858R | 16 | 42.1 |
Light smokers were defined as patients who had smoked less than 100 cigarettes in their lifetime.
