Table 3.

Dukes' stage of colorectal cancer in the screening and follow up phases

Group	Total	Duke's A	Dukes' B	Dukes' C	Dukes' D	Dukes' A+B	Dukes' C+D
Screening phase
1	13	8 (61.5)	4 (30.7)	1 (7.6)	0	12 (92.3)*	1 (7.6)
2	6	0	0	5 (83.3)	1 (16.7)	0	6 (100.0)
3	7	1 (14.3)	1 (14.3)	3 (42.8)	2 (28.6)	2 (28.6)	5 (71.4)
Follow up phase
1	21	2 (9.5)	12 (57.0)	5 (23.7)	2 (9.5)	14 (66.5)†	7 (33.2)
2	23	1 (4.3)	12 (51.6)	6 (25.8)	4 (17.2)	13 (55.9)	10 (43.0)
3	13	1 (7.7)	5 (38.5)	5 (38.5)	2 (15.4)	6 (46.2)	7 (53.9)

*The difference between the Dukes' stage of tumours was significant (p<0.001). There were significantly more cases with tumours of Dukes' stage A+B in group 1 than group 2 (p<0.001) and group 3 (p=0.016).

†There was no difference in Dukes's stage between groups during follow up.