Table 1. Participant characteristics.
| Group | n = 130 | ||
|---|---|---|---|
| Patients with lung cancer | 92 | ||
| Adenocarcinoma | 60 | ||
| Squamous cell carcinoma | 20 | ||
| Non-small cell carcinoma not otherwise specified | 8 | ||
| Small cell carcinoma | 4 | ||
| Stage | Ⅰ | 42 | |
| Ⅱ | 11 | ||
| Ⅲ | 16 | ||
| Ⅳ | 22 | ||
| Unknown | 1 | ||
| Without extrathoracic metastasis | 73 | ||
| With extrathoracic metastasis | 18 | ||
| Metastatic status unknown | 1 | ||
| EGFR mutation status (adenocarcinoma) | |||
| Ex19 deletion | 8 | ||
| L858R | 14 | ||
| Negative or unknown | 38 | ||
| Patients with benign pulmonary disease* | 18 | ||
| Healthy individuals | 20 | ||
* Bacterial pneumonia: 3, Lung abscess: 1, Nontuberculous mycobacterial disease: 3, Tuberculosis: 2, Aspergillosis: 2, Cryptogenic organizing pneumonia: 1, Chronic eosinophilic pneumonia: 1, Sarcoidosis: 1, Pneumothorax: 1, Others: 3