Table 6. The effects of pre-weaning environmental enrichment-based materials on skin lesion score in pigs

	Control1)		WBW-1		WBW-2		SEM	p-value
	X2)	O	X	O	X	O		BWN	AWN	Interaction
Skin lesion score
D 14	41.67	35.59	42.53	37.39	40.34	34.83	4.04	0.710	0.023	0.986
D 28	80.41	78.63	80.87	79.64	83.48	79.28	3.31	0.729	0.219	0.800

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.