Table 1. Clinicopathological characteristics of patients with primary lung adenocarcinoma.
| Factors | Value or no. of patients | |
|---|---|---|
| Age (years) | Median | 69 |
| Range | 29–85 | |
| Sex | Male | 205 |
| Female | 212 | |
| Smoking status | Never smoked | 218 |
| Smoker | 199 | |
| Grade | G1 | 202 |
| G2 | 158 | |
| G3 | 57 | |
| T | T1 | 247 |
| T2 | 138 | |
| T3 | 22 | |
| T4 | 10 | |
| N | N0 | 337 |
| N1–3 | 80 | |
| Stage | I | 305 |
| II | 63 | |
| III | 49 | |
| IV | 0 | |
| pl | No | 323 |
| Yes | 94 | |
| ly | No | 357 |
| Yes | 60 | |
| v | No | 300 |
| Yes | 117 | |
| Histological subtype | AAH/AIS/MIA | 42 |
| Lepidic predominant | 26 | |
| Papillary predominant | 307 | |
| Acinar predominant | 7 | |
| Micropapillary predominant | 1 | |
| Solid predominant | 26 | |
| Variants | 8 | |
| Surgical procedure | Lobectomy | 310 |
| Bilobectomy | 4 | |
| Pneumonectomy | 3 | |
| Sublobar resection | 100 | |
| EGFR* | Wild-type | 123 |
| Mutant | 112 |
*cases for which data were available.
pl: pleural invasion, ly: lymphatic invasion, v: vascular invasion, EGFR: epidermal growth factor receptor gene, AAH: atypical adenomatous hyperplasia, AIS: adenocarcinoma in situ, MIA: minimally invasive adenocarcinoma.