Table 2 Estimates (standard error: SE) and P-values of piglets born alive and sow herd size in the mixed-effects model for pre-weaning mortality in 91 herds
Effects | Pre-weaning mortality (%) | |
|---|---|---|
Estimate (SE) | P-value | |
Intercept (SE)a | 12.388 (0.625) | < 0.01 |
Piglets born alive | 1.217 (0.366) | < 0.01 |
Piglets born alive squared | −0.202 (0.079) | 0.01 |
Sow herd size group | 1.845 (0.779) | 0.03 |
Sow herd size group x Piglets born alive | 0.577 (0.290) | 0.04 |
Year | 0.090 (0.147) | 0.96 |
Year x Year | −0.020 (0.012) | 0.05 |
Year x Piglets born alive | −0.012 (0.052) | 0.77 |
Year x Sow herd size group | −0.014 (0.102) | 0.04 |
Stillborn piglets | 2.621 (0.686) | < 0.01 |
Piglets born alive x Stillborn piglets | 0.059 (0.275) | 0.82 |
Year x Stillborn piglets | 0.112 (0.101) | 0.30 |
Sow herd size group x Stillborn piglets | −0.471 (0.633) | 0.46 |