Table 1.
Patients’ baseline characteristics
| Characteristic | BMs (n = 32) | Without BMs (n = 41) | p value |
|---|---|---|---|
| Sex, n (male/female) | 25/7 | 30/11 | 0.626 |
| Mean age, years | 57.7 ± 7.7 | 60.0 ± 11.2 | 0.324 |
| ECOG PS, n | 0.228 | ||
| 0–1 | 27 | 39 | |
| ≥ 2 | 5 | 2 | |
| Histological subtype, n | 0.020 | ||
| Squamous carcinoma | 7 | 20 | |
| Adenocarcinoma | 24 | 18 | |
| Others | 1 | 3 | |
| Stage, n | < 0.001 | ||
| IVA (M1a) | 0 | 18 | |
| IVA (M1b) | 2 | 0 | |
| IVB (M1c) | 30 | 20 | |
| IIIB/IIIC | 0 | 3 | |
| Lines of therapy, n | 0.295 | ||
| 2nd line | 28 | 32 | |
| ≥ 3rd line | 4 | 9 | |
| Driver gene status, n | 0.354 | ||
| EGFR mutations | 3 | 1 | |
| KRAS mutations | 1 | 3 | |
| Other mutations | 3 | 3 | |
| Negative | 16 | 15 | |
| Unknown | 9 | 19 | |