Table 2 P-values of fixed factors included in the mixed-effects logistic regression models for pre-weaning piglet mortality risk for sows (probabilities of a sow having a piglet death) during early (0–1 days), mid- (2–8 days) and late (9–28 days) lactation
Fixed factors1,2 | Pre-weaning piglet mortality risk | ||
|---|---|---|---|
Early | Mid | Late | |
P-value | P-value | P-value | |
Parity groups | 0.04 | < 0.01 | < 0.01 |
Season groups | 0.02 | 0.01 | 0.10 |
Piglets born alive (PBA) | < 0.01 | < 0.01 | 0.15 |
Stillborn piglets (SB) | < 0.01 | < 0.01 | < 0.01 |
Gestation length (GL) | < 0.01 | < 0.01 | < 0.01 |
Two-way interactions | |||
Parity × season | 0.63 | 0.42 | 0.05 |
Parity × PBA | < 0.01 | 0.04 | < 0.01 |
Parity × GL | 0.13 | 0.27 | 0.16 |
Parity × SB | 0.02 | 0.03 | 0.23 |
Season × PBA | 0.20 | 0.20 | 0.05 |
Season × GL | 0.98 | 0.54 | 0.37 |
Season × SB | 0.33 | 0.45 | 0.08 |
PBA × GL | < 0.01 | 0.28 | 0.44 |
PBA × SB | < 0.01 | 0.06 | 0.09 |
SB × GL | < 0.01 | 0.05 | 0.03 |