Table 2.

Model averaged parameter estimates and parameter weights for the effect of host traits in Platycercus elegans on (a) beak and feather disease virus infection status (infected or uninfected), and (b) viral load (viral gene expression, log₁₀). The set of candidate models included all combinations of one or more predictors, except HL and APR which were not included together because their correlation may bias estimates.

Parameter		Estimate/odds-ratio	SE	Lower 95% CI	Upper 95% CI	Parameter weight
(a) Infection status
Subspecies*	P. e. elegans	0.79	0.06	0.66	0.91	>0.99
	Western Slopes	0.22	0.06	0.11	0.33
	P. e. flaveolus	0.87	0.07	0.73	>0.99
	P. e. adelaidae	0.36	0.06	0.24	0.48
Age*	Subadult	0.79	0.06	0.68	0.91	>0.99
	Young adult	0.52	0.09	0.34	0.69
	Old adult	0.40	0.08	0.25	0.55
HL**		10.79		1.11	105.21	0.67
Sex*	Male	0.65	0.07	0.51	0.79	0.46
	Female	0.52	0.07	0.38	0.66
APR**		4.30		0.01	2090.15	0.09
(b) Viral load
Subspecies	P. e. elegans	−0.67	0.29	−1.23	−0.11	>0.99
	Western Slopes	−3.06	0.45	−3.95	−2.18
	P. e. flaveolus	−0.72	0.35	−1.4	−0.03
	P. e. adelaidae	−2.64	0.33	−3.29	−1.99
Age	Subadult	−0.99	0.23	−1.45	−0.53	0.96
	Young adult	−2.15	0.36	−2.86	−1.44
	Old adult	−2.20	0.35	−2.88	−1.52
Sex	Male	−1.36	0.23	−1.82	−0.90	0.89
	Female	−2.20	0.26	−2.70	−1.69
APR		6.00	2.98	0.16	11.85	0.63
HL		0.48	0.5	−0.51	1.46	0.10

APR = average pairwise relatedness, HL = homozygosity-by-loci, OR = odds-ratio, SE = standard error, CI = confidence interval. *For the binary response variable (BFDV infection status), parameter estimates for categorical variables (subspecies, age, sex) represent the proportion of infected individuals in each group (±SE). ** For the binary response variable (BFDV infection status), parameter estimates for continuous variables (HL, APR) represent the odds-ratio (increased likelihood of infection). Bold indicates continuous variables for which the 95% confidence interval does not span one (for odds-ratios) or zero (for estimates).