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Clinicopathological characteristics of patients
| Characteristics | No. | % |
|---|---|---|
| Age, years | 57 ± 10.3 | |
| Sex | ||
| Male | 107 | 48.9 |
| Female | 112 | 51.1 |
| ECOG PS | ||
| 0-1 | 207 | 94.5 |
| 2 | 11 | 5 |
| TNM | ||
| IIIB | 56 | 25.6 |
| IV | 163 | 74.4 |
| Smoking status | ||
| Never | 151 | 68.9 |
| Current | 47 | 21.5 |
| Former | 17 | 7.8 |
| Unkown | 4 | 1.8 |
| Histology | ||
| Adenocarcinoma | 194 | 88.6 |
| Other | 25 | 11.4 |
