Table 1.

Baseline participant characteristics classified by presence or absence of a metachronous colorectal adenoma

Characteristic	Metachronous adenoma n=50	No metachronous adenoma n=50	P-value
Male, n (%)	26 (52.0)	33 (66.0)	0.16
Age (years; mean ± SD)	68.1 ± 7.0	64.6 ± 9.0	0.03
Body mass index (kg/m2; mean ± SD)	27.6 ± 4.5	27.4 ± 4.5	0.83
Family history of colon cancer* Yes, n (%)	11 (22.0)	19 (38.0)	0.08
Polyps prior to baseline colonoscopy† Yes, n (%)	25 (53.2)	16 (34.4)	0.06
Current smoking Yes, n (%)	6 (12.0)	6 (12.0)	1.00
Race white, n (%)	43 (86.0)	39 (78.0)	0.29

^*History of colorectal cancer in one or more first-degree relatives,

^†History of polyps prior to qualifying colorectal adenoma;

data are missing for six study participants.