. Author manuscript; available in PMC: 2021 Aug 17.

Published in final edited form as: Vet Pathol. 2010 Nov 9;48(1):147–155. doi: 10.1177/0300985810386469

Table 5.

Mast Cell Tumors–Related Mortality by Percentage Class for Histologic Grades According to Institutional Grading System That Uses a Subclassification for Grade 2 Mast Cell Tumors From 95 Cases

Grade^a	n	Mortality, %		χ²	P	Fisher P	Odds Ratio
Grade^a	n	In This Class	In Other Classes	χ²	P	Fisher P	Point Estimate	CI
3	6	66.67	10.11	15.06	.0001	.0029	17.78	2.85–111.04
2b	4	25.00	13.19	0.45	.5033	.4506	2.19	0.21–22.85
2a	50	2.00	26.67	12.08	.0005	.0005	0.06	0.01–0.45
1	3	0.00	14.13	0.49	.4857	1.0000	0.84	0.04–17.22

More than 50% of 6 observers reported this grade. CI, confidence interval.