Table 8.

Pearson correlation coefficients between variables related to body fat, protein, and energy retention from days 3 to 25 in lactation: exp 2

Item	Body fat retention, g/d			Body protein retention, g/d		Body energy retention, kJ/d
	n	r	P-value	r	P-value	r	P-value
Piglet characteristics
Piglet weight day 3, g	36	0.31	NS	0.07	NS	0.25	NS
Piglet gain days 3 to 25, g/d	36	0.93	***	0.99	***	0.97	***
Milk composition
DM, %	29	−0.33	NS	−0.25	NS	−0.34	*
Fat, %	29	−0.45	**	−0.56	***	−0.50	**
Protein, %	32	0.02	NS	0.19	NS	0.08	NS
Lactose, %	31	−0.09	NS	−0.25	NS	−0.13	NS
Milk and nutrient intake1
Milk intake, g/d	32	0.92	***	0.93	***	0.94	***
DM intake, g/d	29	0.92	***	0.93	***	0.94	***
Fat intake, g/d	29	0.88	***	0.84	***	0.88	***
Protein intake, g/d	28	0.76	***	0.87	***	0.81	***
Lactose intake, g/d	29	0.90	***	0.90	***	0.91	***

¹Milk intake was measured by the deuterium dilution technique, and the intake of fat, protein, and lactose was calculated by multiplying the concentration with the intake of milk.

*P ≤ 0.05, **P ≤ 0.01, ***P ≤ 0.001; NS, not significant.