Table 1.

Characteristics of patients with lung cancer and controls

Characteristics	Patients (n = 322)	Controls (n = 384)
Age, years	59.00 ± 9.83	51.16 ± 11.50
≤ 50 years	58 (18.01%)	156 (40.62%)
>  50 years	264 (91.99%)	228 (59.38%)
Gender
Male	245 (76.1%)	278 (72.4%)
Female	77 (23.9%)	106 (27.6%)
Histology
Adenocarcinoma	150
Squamous cell	98
small cell carcinoma	74
Stage
I-II	95
III-IV	213
Missing	34
Lymphatic metastasis
Yes	193
No	127