Table 5.
Final selected linear mixed-effects model (M4) using the VNT titer in the piglets (n = 50) as continuous response variable, the age, VNT titer at birth, VNT titer of the sows, and strains as possible explanatory variables.
| Random effects | Variance | SD | ||
|---|---|---|---|---|
| Piglet | 0.01 | 0.10 | ||
| Residual | 0.04 | 0.20 | ||
| Fixed effects | Estimate | SE | t-Value | |
| Intercept | 0.2 | 0.07 | 2.8 | |
| Age (days) | −0.02 | 0.002 | −8.3 | |
| VNT titer at birth | 0.8 | 0.06 | 12 | |
| VNT titer dam | 0.4 | 0.1 | 3.9 | |
| Strain A TUR/14/98 | −0.8 | 0.4 | −2.0 | |
| Strain O Manisa | −0.05 | 7 | −0.8 | |
| Interaction age and strain A TUR/14/98 | −0.002 | 0.002 | −0.8 | |
| Interaction age and strain O Manisa | 0.006 | 0.001 | 6.4 | |
| Interaction age and VNT titer at birth | −0.005 | 0.001 | −5.3 | |
| Interaction VNT titer dam and strain A TUR/14/98 | 0.8 | 0.4 | 1.9 | |
| Interaction VNT titer dam and strain O Manisa | −0.1 | 0.09 | −1.6 | |
The piglet was included as random variable. Strain Asia-1 was the baseline variable.