Construction and Validation of a Lung Cancer Diagnostic Model Based on 6-Gene Methylation Frequency in Blood, Clinical Features, and Serum Tumor Markers

Table 2

Basic information of included samples.

Samples	Lung cancer patients ()	Healthy subjects ()
Age
≤60	34	42	0.17
>60	36	28
Gender
Male	45	36	0.12
Female	25	34
Smoking history
Smokers	32	22	0.21
Nonsmokers	22	26
Former smokers	16	22
Pathological type
Adenocarcinoma	31	—
Squamous cell carcinoma	39	—
Primary lesion
Left lung	34	—
Right lung	36	—
Stage
I+II	31	—
III+IV	16	—
Unknown	23	—