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Clinical characteristics of 358 never-smokers with non-small cell lung cancer.
| Variable | Patients, n (%) |
|---|---|
| Gender | |
| Male | 84 (23.5) |
| Female | 274 (76.5) |
| Age, years | |
| <40 | 5 (1.4) |
| 40–49 | 74 (20.7) |
| 50–59 | 130 (36.3) |
| ≥60 | 149 (41.6) |
| Differentiation | |
| Poorly | 115 (32.1) |
| Moderately | 128 (35.8) |
| Well | 115 (32.1) |
