Table 2. Participation in the screening colonoscopy program according to enclosure of the risk check questionnaire in the invitation letter.

	With risk check			Without risk check
	Men	Women	Total	Men	Women	Total
Invited	22 340	20 023	42 363	22 227	20 136	42 363
Participation	437	339	776	453	345	798
Percentage	2.0%	1.7%	1.8%	2.0%	1.7%	1.9%
p Risk check				0.54	0.88	0.58

p Risk check = p value for the difference in participation rates according to risk check