Potentially Functional Polymorphisms in POU5F1 Gene Are Associated with the Risk of Lung Cancer in Han Chinese

Table 1

Distributions of select variables in lung cancer cases and cancer-free controls.

Variables	Case ()	Control ()
Age (mean ± sd.)	61.06 ± 10.15	61.32 ± 11.07	0.473
≤60	596 (44.44%)	883 (44.55%)	0.980
>60	745 (55.56%)	1099 (55.45%)
Gender
Male	949 (70.77%)	1358 (68.52%)	0.179
Female	392 (29.23%)	624 (31.48%)
Smoking status
Current	634 (47.28%)	876 (44.20%)	<0.001
Former	185 (13.80%)	86 (4.34%)
Never	522 (38.92%)	1020 (51.46%)
Pack-year (py.)
≤25	774 (57.72%)	1505 (75.93%)	<0.001
>25	567 (42.28%)	477 (24.07%)
Histology type
Squamous cell carcinoma	481 (35.87%)
Adenocarcinoma	860 (64.13%)