Table 2.
Patient Characteristics With or Without Brain Radiotherapy
| Characteristic | Brain Radiotherapy− (n = 18) | Brain Radiotherapy+ (n = 4) |
|---|---|---|
| Sex | ||
| Male | 7 | 4 |
| Female | 11 | 0 |
| Age (y) | ||
| Median | 66 | 57 |
| Range | 44–74 | 36–61 |
| Race | ||
| White | 16 | 4 |
| Black | 0 | 0 |
| Hispanic | 1 | 0 |
| Unknown | 1 | 0 |
| Histotype | ||
| Adenocarcinoma | 8 | 1 |
| Squamous cell carcinoma | 3 | 0 |
| Adenosquamous cell carcinoma | 2 | 1 |
| Large cell carcinoma | 3 | 2 |
| Not otherwise specified | 2 | 0 |
| EGFR mutation | ||
| Positive | 1 | 0 |
| Negative | 10 | 2 |
| Unknown | 7 | 2 |
| ALK fusion | ||
| Positive | 2 | 0 |
| Negative | 6 | 1 |
| Unknown | 10 | 3 |
| Smoking status | ||
| Current | 4 | 2 |
| Former | 11 | 1 |
| Never | 1 | 0 |
| Unknown | 2 | 1 |
| Interval between lung and brain tumor sampling (d) | ||
| Median | 255 | 287 |
| Range | 0–2234 | 42–668 |
| Clinical stage at the time of lung tumor sampling | ||
| Nonmetastatic | 11 | 1 |
| Metastatic | 6 | 2 |
| Unknown | 1 | 1 |