Table 1. Clinical characteristics of patients (N=53).

Characteristics	Value
Age, years
Median [range]	57 [32–84]
Sex, n (%)
Male	29 (54.7)
Female	24 (45.3)
Smoking history, n (%)
Current (1–20 packs/day)	5 (9.4)
Current (>20 packs/day)	3 (5.7)
Former	2 (3.8)
Never	42 (79.2)
Unknown	1 (1.9)
Nodule diameter, cm
Median (range)	1.3 (1.0–2.0)
Clinical diagnosis, n (%)
Benign	21 (39.6)
Stage I adenocarcinoma	20 (37.7)
Stage II–IIIA adenocarcinoma	5 (9.4)
Stage IIIB–IV adenocarcinoma	7 (13.2)
Treatment history, n (%)
Treatment naïve	49 (92.5)
Relapse after surgery/anti-tumor therapy	4 (7.5)
Other complemental assay, n (%)
Bronchoscopy biopsy	38 (71.7)
Bronchial brushing cytology	51 (96.2)
Lavage cytology	53 (100.0)