Table 3.

Correlation of the malignancy of thymoma with survival days, cause of death and sacrifice type in Fischer 344/N rats

	Benign	Malignant
		without metastasis	with metastasis
Number of animals	228 a, b	28	14
Mean survival days c	713 ± 4	609 ± 27	506 ± 42
Cause of death: thymoma	4	11	11
Sacrifice type
Natural death	16	8	8
Moribund sacrifice	48	9	6
Terminal sacrifice	164	11	0

^aSeven animals were not included in this table (2 accidental deaths and 5 animals that were sacrificed for interim necropsy).

^b227 animals were used for calculating mean survival days (1 rat from a study that was terminated early due to high mortality was not included), but 228 animals were used to calculate the number of animals in each sacrifice type.

^cStudy days on which animals were sacrificed. Value shown is group mean ± S.E.