Table 1. Clinical characteristics of 203 lung adenocarcinoma patients.
| Characteristic | No. of patients (N=203) | Percentage (%) |
|---|---|---|
| Age, years | ||
| <60 | 57 | 28.1 |
| ≥60 | 146 | 71.9 |
| Sex | ||
| Male | 103 | 50.7 |
| Female | 100 | 49.3 |
| Stage | ||
| IIIB | 34 | 16.7 |
| IV | 169 | 83.3 |
| Smoking history | ||
| Never smokers | 139 | 68.5 |
| Current or former | 64 | 31.5 |
| Stage of treatment | ||
| Newly diagnosed | 184 | 90.6 |
| PD after EGFR-TKIs | 8 | 3.9 |
| Recurrence after surgery | 11 | 5.4 |
| Tissue | ||
| Biopsy under bronchoscopy | 32 | 15.8 |
| Pulmonary aspiration | 119 | 58.6 |
| Intraoperatively | 2 | 1.0 |
| Metastatic sites | ||
| Lymph nodes | 12 | 5.9 |
| Pleura | 12 | 5.9 |
| Pleural effusion cell blocks | 24 | 11.8 |
| Pericardial effusion cell blocks | 2 | 1.0 |
PD, progressive disease; EGFR-TKIs, epidermal growth factor receptor-tyrosine kinase inhibitors.