Table 3. The effects of pre-weaning environmental enrichment-based materials on uniformity in pigs
| Control1) | WBW-1 | WBW-2 | SEM | p-value |
| X2) | O | X | O | X | O | BWN | AWN | Interaction |
| CV |
| Phase 1 (d 14) | 12.31 | 10.73 | 10.27 | 8.69 | 11.97 | 9.68 | 1.06 | 0.033 | 0.006 | 0.864 |
| Phase 2 (d 28) | 13.24 | 12.87 | 11.12 | 8.22 | 10.96 | 9.11 | 1.05 | 0.001 | 0.009 | 0.250 |
Control, no environmental enrichment installation during lactation; WBW-1, environmental enrichment installation 1 week before weaning; WBW-2, environmental enrichment installation 2 weeks before weaning.
X, without object installation as environmental enrichment after weaning; O, with object installation as environmental enrichment after weaning.
CV, coefficient of variation.