TABLE 6.

IGF-I, IGFBP3, and BUN concentrations at 5 and 12 mo of age¹

	5 mo		12 mo		P
	Meat	Dairy	Meat	Dairy	Group-by-time interaction	Main effect of time
IGF-I, ng/mL	66 ± 20	61 ± 17	77 ± 27	70 ± 25	0.62	0.007
IGFBP3, ng/mL	2261 ± 420	2165 ± 421	2468 ± 545	2532 ± 532	0.89	0.00003
BUN, mg/dL	9 ± 2	8 ± 2	14 ± 5	15 ± 5	0.32	<0.00001

¹Values are means ± SDs; n = 30 for the meat-based protein group and n = 31 for the dairy-based protein group. BUN, blood urea nitrogen; Dairy, dairy-based complementary protein group; IGF-I, insulin-like growth factor I; IGFBP3, insulin-like growth factor-binding protein 3; Meat, meat-based complementary protein group.