Table III.
Mixed model of the factors associated with grower-finisher culling rate (1996 to 2000, 1502 pig barn groups)
| Random effects | Estimate (%) | sχ̄ | 95% CI | LMS (In) |
|---|---|---|---|---|
| Production turn | 0.1604 (31.8)a | 0.0658 | 0.0822,0.4398 | — |
| Site nested within turn | 0.1077 (21.3)a | 0.0152 | 0.0832,0.1450 | — |
| Residual | 0.2361 (46.8)a | 0.0093 | 0.2189,0.2553 | — |
| Total | 0.5042 (100.0) | — | — | — |
| Fixed effects | β | sχ̄ | 95% CI | |
| Average entry weight | −0.2298a | 0.0105 | −0.0323, −0.1365 | 0.43 (1.54)d |
| Average entry weight quadratic | 0.0042a | 0.0001 | 0.0022,0.0062 | — |
| Days on feed | −0.0098a | 0.0025 | −0.019, −0.0002 | −0.37 (0.69)e |
| Quarter 1 | 0.0847b | 0.0077 | −0.0663, −0.2357 | −0.07 (0.92) |
| Quarter 2 | 0.1942c | 0.0824 | 0.0325,0.3559 | 0.03 (1.03) |
| Quarter 3 | 0.2021c | 0.0739 | 0.0571,0.3470 | 0.08 (1.09) |
| Quarter 4 | Referenceb | — | — | −0.16 (0.85) |
LMS — least mean square in the log scale and the back transformed estimate; sχ̄ — standard error
a
P < 0.01
bc
Values within a column with a different letter means significant difference (P < 0.05)
d
LMS for a close-out group of 15 kg at entry and 120 d on feed
e
LMS for a close-out group with 24 kg at entry and 140 d on feed