Table 1.

Probabilities and sources of the Markov model

Variable	Value (%)	Ref
10 year risk of a metachronous CRC after:
Proctocolectomy	0
Subtotal colectomy with ileorectal anastomosis	4	9,12
Segmental resection or hemicolectomy	16	9
Distribution of screen detected CRC stages ⩽2 year		7–9
Dukes’ A	32
Dukes’ B	54
Dukes’ C	14
Colorectal cancer 5 year survival rates		13
Dukes’ A	98
Dukes’ B	80
Dukes’ C	60
Mortality rate associated with colorectal surgery	0.5	14–18

CRC, colorectal cancer.