Association of BTLA Polymorphisms with Susceptibility to Non-Small-Cell Lung Cancer in the Chinese Population

Table 2

Distribution of selected demographic variables and risk factors in NSCLC cases and controls.

Variable	Cases ()		Controls ()		^a
		%		%
Age (years)					0.139
Age (years)					0.292
<59	465	46.36	396	43.95
≥59	538	53.64	505	56.05
Sex					<0.001
Male	520	51.84	552	61.27
Female	483	48.16	349	38.73
Tobacco use					<0.001
Never	634	63.21	717	79.58
Ever	369	36.79	184	20.42
Alcohol use					<0.001
Never	789	78.66	804	89.23
Ever	214	21.34	97	10.77
BMI (kg/m^2)					<0.001
<24	672	67.00	497	55.16
≥24	331	33.00	404	44.84
Type of NSCLC
SCC	145	14.46
Non-SCC	858	85.54

Notes: ^atwo-sided test and Student’s -test. Abbreviations: BMI: body mass index; NSCLC: non-small-cell lung cancer; SCC: squamous cell carcinoma.