Table 1.

Baseline Characteristics.

Characteristics	Value
Number of cases, n	18
Male, n (%)	11 (61.1)
Age (years), mean ± SD	55.4 ± 11.8
< 40 years, n (%)	2 (11.1)
≥ 40 to < 50 years, n (%)	6 (33.3)
≥ 50 to < 60 years, n (%)	2 (11.1)
≥ 60 years, n (%)	8 (44.4)
Smoking, n (%)	5 (27.8)
Single nodule, n (%)	18 (100)
Size of the nodule
≥ 8 to < 10 mm, n (%)	2 (11.1)
≥ 10 to < 20 mm, n (%)	7 (38.9)
≥ 20 to < 30 mm, n (%)	9 (50.0)
Diagnosis
Lung cancer, n (%)	12 (66.7)
Sarcoidosis, n (%)	4 (22.2)
Tuberculosis, n (%)	1 (5.6)
Pneumonia, n (%)	1 (5.6)