TABLE 1.
Characteristics of lung cancer patients with brain metastases.
| Characteristics | Small cell carcinoma (N = 13) | Adenocarcinoma (N = 58) | Squamous cell carcinoma (N = 9) | p-value |
| Age (years) | 67.08 ± 9.32 | 65.78 ± 10.74 | 70.11 ± 8.46 | 0.61 |
| Sex | 0.05 | |||
| Male | 12 (92.3%) | 21 (36.2%) | 1 (11.1%) | |
| Female | 1 (7.7%) | 37 (63.8%) | 8 (88.9%) | |
| Smoking history | 0.01 | |||
| Yes | 9 (75%) | 24 (43.6%) | 8 (88.8%) | |
| No | 3 (25%) | 31 (56.4%) | 1 (11.2%) | |
| RPA | 0.01 | |||
| 1 | 0 (0%) | 0 (0%) | 1 (11.1%) | |
| 2 | 8 (72.7%) | 49 (90.7%) | 5 (55.5%) | |
| 3 | 3 (27.3%) | 5 (9.3%) | 3 (33.4%) | |
| Number of BMs | 107 | 432 | 23 | |
| Number of BMs per patient | 8.23 ± 11.00 | 7.45 ± 7.41 | 2.56 ± 2.07 | 0.13 |
| BM volume (mm3) | 544.36 ± 2767.97 | 350.86 ± 1795.51 | 4097.30 ± 15793.24 | 0.04 |
RPA, recursive partitioning analysis, BM, brain metastasis.