Table 1.

Characteristics of Patients

Variables	Group 1 (n = 40)	Group 2 (n = 69)	Group 3 (n = 122)	p
Age (years) (mean, range)	63 31–78	60 23–83	65 42–91	0.15
Male sex (number, %)	36, 90.0%	48, 69.6%	114, 93.4%	< 0.01*
Treatment for primary site				0.11
Surgery (number, %)	26, 65.0%	60, 87.0%	110, 83.8%
Chemotherapy	8, 20.0%	4, 5.8%	12, 9.8%
Radiotherapy or ablation	1, 2.5%	1, 1.4%	2, 1.6%
Unknown	5, 12.5%	4, 5.8%	7, 5.8%
Disease-free interval (month)	33.6 ± 28.8	20.5 ± 14.7	27.1 ± 20.2	0.02*
Pathological maximum diameter (mm)	24.2 ± 28.9	30.8 ± 37.3	27.8 ± 24.3	0.09
Procedures (number, percent)				0.21
Sublobar	28, 70.0%	41, 59.4%	64, 52.5%
Lobectomy or more	12, 30.0%	28, 40.6%	58, 47.5%

Note: *p < 0.05 indicates significant values.