Table 2.

Cumulative incidence of colorectal cancer (CRC) during the screening and follow up phases

Group	Subjects enrolled (n)	CRC incidence in screening phase	Subjects followed (n)	CRC incidence in follow up phase	CRC incidence in screening and follow up phases
1	2538	13 (0.51)*	2525	21 (0.88)†	34 (1.35)
2	1010	6 (0.59)	1004	23 (2.28)	29 (2.89)
3	1376	7 (0.51)	1369	13 (0.94)	20 (1.46)
1+2	3548	19 (0.54)	3529	44 (1.25)‡	63 (1.78)

Values are number (%).

*There was no difference in the incidence of CRC between the groups during screening.

†Incidence was higher in group 2 compared with group 1 (p<0.001) and group 3 (p=0.013).

‡There was no significant difference in incidence comparing group 1 or group 1+2 and group 3.