. Author manuscript; available in PMC: 2015 Jan 1.

Published in final edited form as: Mol Carcinog. 2012 Apr 19;53(1):10.1002/mc.21917. doi: 10.1002/mc.21917

Table 1.

Characteristics of study population (N= 2410, 894/1516)

Variables	Control (n %)	Case (n %)	P value
Age, mean(SD)	63.23 (10.91)	59.69 (10.69)	<0.001
Sex
Male	1174 (77.44)	609 (68.12)
Female	342 (22.56)	285 (31.88)	<0.001
Smoking status
Ever	853 (56.27)	515 (57.61)
Never	663 (43.73)	379 (42.39)	0.52