Table 3.

The number and incidence of colorectal tumors in each group at 21th and 24th weeks.

Time	Group	n	No. of tumor-bearing rats	Number of gross tumors (No. of rats)				The incidence of visible tumors in rats (%)
				0	1-2	3-4	>4
21th week	Control	6	0	0	0	0	0	0.00
	Model	6	6	2	4	0	0	66.67
	Heat M	6	6	2	4	0	0	66.67
	Cold M	6	6	1	5	0	0	83.33
24th week	Control	6	0	0	0	0	0	0.00
	Model	6	4	2	4	0	0	66.67
	Heat M	6	6	0	6	0	0	100.00
	Cold M	6	6	0	5	1	0	100.00