Table 1. Clinical characteristics of recruited participants.

	Lung cancer (n=50)	Noncancer control (n=38)	P value
Age, years			0.135
Mean ± SD	63.0 ± 9.6	60.1 ± 7.8
Range	37-81	45-79
Gender, n (%)			0.765
Male	42 (84%)	31 (81.6%)
Female	8 (16%)	7 (18.4%)
Smoking status, n (%)			0.888
Smokers	31 (62%)	23 (60.5%)
Nonsmokers	19 (38%)	15 (39.5%)
Pack-years	54.8 ± 6.3	41.4 ± 5.6	0.134
Cell type, n (%)
Squamous cell carcinoma	19 (38%)
Adenocarcinoma	19 (38%)
Small-cell lung cancer	12 (24%)
TNM stage, n (%)
I	12 (24%)
II	12 (24%)
III	12 (24%)
IV	14 (28%)