Table 4.
Linear mixed regression model of the variables associated with a change in BRSV percentage positivity (PP) from the beginning of gradual weaning (day -14) to 2 weeks post weaning (day +14)
| Variable | Categories | Coefficient | Standard error | P value |
|---|---|---|---|---|
| Intercept | 31.577 | 5.292 | <0.001 | |
| Maximum rectal temperature (°C) in the pre-weaning period (d-56 to d-14) | 38.9–39.4 | Baseline | ||
| 39.5–39.6 | 7.956 | 4.955 | 0.108 | |
| 39.7–40.0 | -7.442 | 4.513 | 0.099 | |
| 40.1–41.3 | -3.732 | 4.474 | 0.404 | |
| Random effects | Variance estimate | Standard error | ||
| Pen | 78.259 | 73.088 | <0.001 | |
| Residual | 194.018 | 34.026 | ||