Table 4.

Least-squares means for the effect of Intervention Treatment and Birth Weight Category on immunoglobulin immunocrit values at 24 h after birth

	Intervention Treatment1					Birth Weight Category2
Item.	Control	Warming	Drying+ Warming	SEM	P-value	Light	Medium	Heavy	SEM	P-value
Number of piglets	54	56	55	—	—	15	80	70	—	—
Birth weight, kg	1.44	1.47	1.45	0.055	0.93	0.88	1.31	1.75	0.027	<0.0001
Immunoglobulin immunocrit, %3	13.1a	13.2a	11.7b	0.42	0.03	12.0	12.3	13.3	0.51	0.10

¹Control = no treatment; Warming = placed in a plastic box under a heat lamp for 30 min; Drying+Warming = dried with desiccant, placed in a plastic box under a heat lamp for 30 min.

²Light = <1.0 kg; Medium = 1.0 to 1.5 kg; Heavy = >1.5 kg.

³Blood samples obtained at 24 h after birth on a subsample of four piglets per litter, one from each birth weight quartile.