Table 1.

Numbers of calves that fall into the different categories used for the statistical analysis of the effects of heterozygosity and introgression on likelihood of death and clinical illness

	Low heterozygosity		High heterozygosity
	Introgressed	Non-introgressed	Introgressed	Non-introgressed
Died	2	11	11	44
Survived with clinical episode	6	13	64	160
Survived without clinical episode	1	4	29	173

Cut-offs for high/low heterozygosity and introgressed/non-introgressed are defined in Methods.