Table 1. Clinicopathological characteristics of patients with lung adenocarcinoma.
| Characteristic | Number | % |
|---|---|---|
| Age | ||
| <60 | 56 | 50.9 |
| ≥60 | 54 | 49.1 |
| Gender | ||
| Male | 44 | 40.0 |
| Female | 66 | 60.0 |
| Smoking status | ||
| Yes | 37 | 33.6 |
| No | 73 | 66.4 |
| Stage | ||
| I | 58 | 52.7 |
| II | 16 | 14.5 |
| III | 36 | 32.7 |
| Tumor size (cm) | ||
| ≤3 | 85 | 77.3 |
| >3 | 25 | 22.7 |
| Tumor differentiation | ||
| Poorly differentiated | 28 | 25.5 |
| Moderately differentiated | 44 | 40.0 |
| Well differentiated | 38 | 34.5 |
| Lymph node metastasis | ||
| Yes | 47 | 42.7 |
| No | 63 | 57.3 |
| EGFR status | ||
| Mutant | 62 | 56.4 |
| Wild type | 48 | 43.6 |
| PD-L1 expression | ||
| Positive | 42 | 38.2% |
| Negative | 68 | 61.8% |
EGFR, epidermal growth factor receptor.