Table 1 The baseline characteristics of 258 patients with lung carcinoma
Variables | n = 258 patients | % |
|---|---|---|
Age (year) | ||
Median (range) | 69 (55–99) |  |
Gender | ||
 Male | 135 | 52.3% |
 Female | 123 | 47.7% |
Smoking status | ||
 Smokers | 90 | 34.9% |
 Never smoked | 160 | 62.0% |
 Unknown | 8 | 3.1% |
Histologic types | ||
 Adenocarcinoma (ADC) | 172 | 66.7% |
 Squamous cell carcinoma (SCC) | 20 | 7.8% |
 Adenosquamous carcinoma (ASC) | 3 | 1.2% |
 Large cell carcinoma | 1 | 0.4% |
 Small-cell carcinoma | 3 | 1.2% |
 Unknown | 59 | 22.9% |
Clinical stage | ||
 I | 5 | 1.9% |
 II | 4 | 1.6% |
 III | 35 | 13.6% |
 IV | 202 | 78.3% |
 Unknown | 12 | 4.7% |