Table 8 For low prolific sowsa, estimates of fixed factors and random effect variance included in the final linear mixed effects models for number of piglets born alive and for piglets weaned
Piglets born alive | Piglets weaned | |||
|---|---|---|---|---|
Fixed and random effectsb,c | Estimate (± SE) | P-value | Estimate (± SE) | P-value |
Intercept | 11.36 (0.14) | < 0.01 | 9.66 (0.13) | < 0.01 |
Farm groupsd | < 0.01 | < 0.01 | ||
High-performing (HP) farms | 1.34 (0.18) | 1.45 (0.18) | ||
Intermediate-performing (IP) farms | 0.52 (0.16) | 0.68 (0.16) | ||
Parity groups (Py) | < 0.01 | < 0.01 | ||
1 | - 6.24 (0.12) | - 1.38 (0.10) | ||
2 | - 1.00 (0.12) | 0.18 (0.10) | ||
3 | - 0.18 (0.13) | 0.23 (0.10) | ||
4 | - 0.20 (0.13) | 0.32 (0.11) | ||
5 | - 0.09 (0.13) | 0.25 (0.11) | ||
Farm x Py | < 0.01 | < 0.01 | ||
HP farms x Py 1 | - 1.38 (0.17) | 0.79 (0.13) | ||
HP farms x Py 2 | 0.09 (0.17) | 0.01 (0.14) | ||
HP farms x Py 3 | - 0.02 (0.17) | - 0.07 (0.14) | ||
HP farms x Py 4 | 0.33 (0.18) | - 0.06 (0.14) | ||
HP farms x Py 5 | 0.30 (0.17) | - 0.10 (0.15) | ||
IP farms x Py 1 | - 0.26 (0.15) | 0.61 (0.12) | ||
IP farms x Py 2 | 0.16 (0.15) | - 0.06 (0.12) | ||
IP farms x Py 3 | - 0.04 (0.16) | - 0.06 (0.13) | ||
IP farms x Py 4 | 0.16 (0.16) | - 0.26 (0.13) | ||
IP farms x Py 5 | - 0.07 (0.16) | - 0.25 (0.13) | ||
Intercept variance at farm level | 0.15 (0.03) | – | 0.23 (0.04) | – |
Intercept variance at sow level | 0.16 (0.01) | – | 0.07 (0.01) | – |
ICC (records within the same farm), % | 1.9 | – | 4.5 | – |
ICC (records within the same sow), % | 3.9 | – | 6.0 | – |