Table 1.
Patient Characteristics
| Characteristic | Total | % |
|---|---|---|
| Total | 447 | |
| Median age, years | 66 | |
| Range | 33-86 | |
| Sex | ||
| Male | 373 | 83.4 |
| Female | 74 | 16.6 |
| Smoking history | ||
| Never | 40 | 8.9 |
| Former | 232 | 51.9 |
| Current | 157 | 35.1 |
| Unknown | 18 | 4.1 |
| Histology | ||
| Adenocarcinoma + bronchioloalveolar | 241 | 53.9 |
| Squamous cell carcinoma | 139 | 31.1 |
| Other* | 67 | 15.0 |
| Pathologic stage | ||
| I | 166 | 37.1 |
| II | 99 | 22.2 |
| III | 155 | 34.7 |
| IV | 27 | 6.0 |
| Grade | ||
| I | 32 | 7.2 |
| II | 255 | 57.3 |
| III | 158 | 35.2 |
| Not defined | 2 | 0.3 |
*
Other histology included seven patients with large cell carcinoma, 28 cases with neuroendocrine differentiation, and 32 undifferentiated non–small-cell lung cancer.