Table 1.
The clinical characteristics of patients with primary lung cancer.
| Characteristics | LM group (n = 172) | NLM group (n = 1574) | P value |
|---|---|---|---|
| Gendera | |||
| Male | 133 (72.2%) | 1137 (77.3%) | 0.155 |
| Female | 39 (27.8%) | 437 (22.7%) | |
| Mean ageb | 61.3 ± 12.3 | 59.9 ± 11.0 | 0.105 |
| Histopathological type | |||
| Squamous cell carcinoma | 57 (33.1%) | 508 (32.3%) | |
| Adenocarcinoma | 70 (40.7%) | 771 (49.0%) | |
| Large-cell carcinoma | 3 (1.7%) | 22 (1.4%) | |
| Small-cell lung cancer (SCLC) | 28 (16.3%) | 178 (11.3%) | |
| Poorly differentiated | 11 (6.4%) | 57 (3.6%) | |
| Other NSCLC | 1 (0.6%) | 25 (1.6%) | |
| Unknown | 2 (1.2%) | 13 (0.8%) | |
| Treatment | |||
| Surgery | 17 (10.0%) | 269 (17.1%) | |
| Chemotherapy | 111 (64.5%) | 1000 (63.5%) | |
| Radiotherapy | 17 (9.9%) | 185 (11.8%) | |
| Symptomatic treatment | 42 (24.4%) | 355 (22.6%) | |
| Others | 13 (7.6%) | 85 (5.4%) |
Abbreviations: LM: liver metastasis; NLM: nonliver metastasis; NSCLC: non-small-cell lung cancer. aChi-squared test was performed. bIndependent t-test was performed. P < 0.05 revealed a significant difference.