Table 2. Correlation coefficients among parity, average daily feed intake (ADFI), lactation length, and wean-to-estrus interval in sows

Item	ADFI (g/d)	Lactation length (d)	Wean-to-estrus interval (d)
Parity	0.186**	−0.159**	−0.129**
ADFI (g/d)	-	0.186*	−0.124*
Lactation length (d)	-	-	−0.017

p < 0.05
p < 0.001.