Table 1.

The study group

Dukes' stage	n	Sex	Median age (years)	%
A	55	34 M	69	30
		21 F	70
B	46	31 M	67	25
		15 F	69
C	43	28 M	67	23
		15 F	64
D	23	11 M	70	13
		10 F	69
Other	16	9 M	72	9
		7 F	80