Table 1. The incidence of colorectal tumor, tumor incidence and tumors/polyps per tumor bearing rats.

No.	Group	No. of rats	Tumor bearing rats	Tumor incidence	Total number of tumor/polyps	No. of tumors/polyps per tumor‑bearing rat
1	Normal	10	0	0	0	0
2	DMH	10	10	100	25	2.5
3	DMH + BB (5 mg/kg)	10	8	80	18	2.25
4	DMH + BB (10 mg/kg)	10	5	50	10	2
5	DMH + BB (15 mg/kg)	10	2	20	2	1

DMH, 1,2-dimethylhydrazine; BB, boeravinone B.