Table 2.

Analysis of association between numbers of carried copies of either allele A (Ser225) or allele C (deletion) and CWD risk in wild reindeer from Nordfjella zone 1. Regression coefficients and associated statistics from Firth logistic regression. Asterisk indicates a significant value. Abbreviations: S.E. = standard error; C.I. = confidence interval.

Predictor	Regression coefficient	S.E.	95% C.I.		P-value	Odds ratio
Constant	−4.04	1.452	−8.89	−2.08	<0.001	-
No copies	Baseline
Single copy of allele A or C	1.75	1.52	−0.48	6.64	0.144	5.75
Two copies of allele A or C	3.75	1.494	1.63	8.62	<0.001*	42.39