Table 4.

IGF-1 reference intervals

	n	ng/mL	ng/mL
		2.5th	97.5th
Females
3 mo–<1 yr	30	30	98
1–<3 yr	42	44	174
3–<10 yr	200	65	457
10–<13 yr	127	100	692
13–<15 yr	87	148	912
15–18 yr	58	162	708
>18 yr	41	69	490
Males
3 mo–<1 yr	30	30	98
1–<3 yr	45	32	91
3–<10 yr	227	45	295
10–<13 yr	143	100	437
13–<15 yr	136	132	692
15–18 yr	126	129	741
>18 yr	60	87	562

n=1352.