Table 4.

Final selected logistic mixed-effects model (M3) using the presence of a VNT titer (<0.3 is negative, 0.3 or higher is positive) in the piglets (n = 50) as binary response variable, the age (days), the VNT titer at birth, and strains as possible explanatory variables.

Random effects	Variance	SD
Piglet	2.7	1.7
Fixed effects	Estimate	SE	z-Value	p-Value
Intercept	−0.2	0.9	−4.5	0.8
VNT titer at birth	6.5	0.8	8.1	≪0.001
Age (days)	−0.2	0.02	−8.8	≪0.001
Strain A TUR/14/98	2.7	2.6	1.0	0.3
Strain O Manisa	−1.2	1.2	−0.9	0.3
Interaction age and strain A TUR/14/98	−0.4	0.05	−0.8	0.4
Interaction age and strain O Manisa	0.1	0.02	3.6	0.0003

The piglet was included as random variable. Strain Asia-1 was the baseline variable.