Table 1. Clinical characteristics of 109 patients with lung adenocarcinoma.
| Characteristic | No. of Patients(N = 109) | Percentage(%) |
|---|---|---|
| Age, years | ||
| <60 | 31 | 28.4 |
| ≥60 | 78 | 71.6 |
| Sex | ||
| Male | 51 | 46.8 |
| Female | 58 | 53.2 |
| Stage | ||
| IIIB | 20 | 18.3 |
| IV | 89 | 81.7 |
| Smoking history | ||
| Never smokers | 73 | 67.0 |
| Current or former | 36 | 33.0 |
| Stage of treatment | ||
| Newly diagnosed | 100 | 91.7 |
| PD after EGFR-TKIs | 4 | 3.7 |
| Recurrence after surgery | 5 | 4.6 |
| Tissue | ||
| Biopsy under bronchoscopy | 22 | 20.2 |
| Pulmonary aspiration | 60 | 55.1 |
| Intraoperatively | 1 | 0.9 |
| Lymph nodes | 7 | 6.4 |
| Pleura | 8 | 7.3 |
| Pleural effusion cell blocks | 11 | 10.1 |
PD: progressive disease; EGFR-TKIs: epidermal growth factor receptor-tyrosine kinase inhibitors.