Table III.

Patient demographics.

Variables	No. of patients	%
Gender (n=1,472)
Male	1,077	73.00
Female	358	27.00
Age (n=1,046)
<40	24	2.29
40–60	384	36.71
>60	638	60.99
Histology (n=497)
Adenomas	410	82.49
Squamous	62	12.47
Adenosquamous	14	2.82
Large-cell	11	2.21
Smoking status (n=561)
Smokers	334	59.54
Ex-smokers	75	13.37
Non smokers	152	27.09