Table 3.

Results of generalized linear model (n = 492^*).

Explanatory variable	P-value	OR [IC 95%]
Intercept	<2e-16	0.11 [0.07–0.17]
Species (ref=chicken)	3.89e-7	3.01 [1.97–4.63]
Province (ref=Kandal)	1.39e-3	2.01 [1.31–3.09]
Age	7.29e-5	1.05# [1.02–1.07]

^*Birds with unknown or only estimated age (e.g., “>12 months”) were removed from the analysis.

^#Odds ratio of being seropositive for an additional month of age is 1.04.