The Influence of Smoking, Gender, and Family History on Colorectal Adenomas

Table 3

(a) Comparison of adenoma occurrence among men and women in a colorectal screening population in relation to smoking history.

Men (N, column%)						Women (N, column %)
Adenoma Status	No Pack-Years	≤15 Pack-Years	>15 Pack-Years	𝑃^a	No Pack-Years	≤15 Pack-Years	>15 Pack-Years	𝑃^a
None	969 (85)	402 (82)	514 (78)	<.001	1,570 (91)	693 (92)	541 (86)	<.001
One or more	166 (15)	90 (18)	143 (22)		160 (9)	58 (8)	89 (14)

(b) Comparison of adenomas among a colorectal screening population with and without a family history of colorectal cancer or polyps, in relation to smoking status.

		No Family History				Family History
Adenoma Status	No Pack-Years	≤15 Pack-Years	>15 Pack-Years	𝑃^a	No Pack-Years	≤15 Pack-Years	>15 Pack-Years	𝑃^a
None	2,195 (90)	935 (88)	944 (83)	<.001	344 (83)	160 (86)	111 (75)	.019
One or more	257 (10)	123 (12)	195 (17)		69 (17)	25 (14)	37 (25)

^a𝑃-values based on Pearson's 𝜒².