TABLE 1.

Demographics of the control, adenoma and carcinoma groups

Demographic characteristic	No. of patients in group:			P valuea
	Control (n = 102)	Adenoma (n = 102)	Carcinoma (n = 36)
Age (yr)
50–59	18	17	6	0.994
60–69	49	50	19
>70	35	35	11
Sex
Female	40	40	16	0.833
Male	62	62	20
Race
White	95	96	33	0.799
Hispanic	4	2	1
Black	2	2	2
Other/unknown	1	2	0
Smoking history
Smoker	58	66	18	0.340
Nonsmoker	43	36	18
Missing	1	0	0

^aFisher’s exact test was used to calculate the P values.