Table 1. Pairwise comparisons evaluating the virulence of Ascosphaera apis strains.

Variable		Hazard ratio	95% CI	χ2	Corrected P
Strains
	Strain D vs Strain A	1.08	0.39–3.07	0.0193	5.337
	Strain G vs Strain A	4.71	2.19–11.66	13.5700	0.0012
	Strain F vs Strain A	6.62	3.13–16.25	20.8383	< 0.0006
	Strain F vs Strain D	6.16	3.01–14.28	21.5207	< 0.0006
	Strain G vs Strain D	4.38	2.11–10.25	13.7430	0.0012
	Strain F vs Strain G	1.41	0.86–2.27	1.8926	1.0134
Colony
	Colony 3 vs Colony 1	1.22	1.22–0.64	0.3576	1.6494
	Colony 2 vs Colony 1	2.67	2.67–1.58	12.5807	0.0012
	Colony 3 vs Colony2	0.46	0.26–0.77	8.1108	0.0132

Confidence intervals are 95% Hazard Ratio Profile Likelihood Limits. Significant differences are given in bold-faced print. Bonferonni correction was used to adjust the p-values.