Table 3.

Geometric mean 25(OH)D concentration by total vitamin D intake

	All			Children/Adolescents			Young Adults / Adults
Total vitamin D intake (diet and supplements)	n	Mean 25(OH)D nmol/L (95% CI)	p	n	Mean 25(OH)D nmol/L (95% CI)	p	n	Mean 25(OH)D nmol/L (95% CI)	p
0 – 200 IU/day	35	62.5 (55.3–70.5)	<0.001	24	74.8 (66.2–84.2)	0.02	11	44.0 (34.2–56.0)	<0.001
>200 – 400 IU/day	26	83.8 (72.5–96.5)		11	87.0 (72.8–104.0)		15	84.2 (68.2–103.8)
>400 – 600 IU/day	20	101.8 (86.5–119.5)		6	102.0 (79.0–132.0)		14	97.0 (78.8–119.5)
>600 – 1000 IU/day	14	109.8 (90.5–133.0)		3	123.2 (87.8–173.2)		11	103.0 (81.5–130.5)

Abbreviations: CI = confidence interval, IU = International Units, L = liter, nmol = nanomoles.

^*Geometric means, adjusted for prednisone use at the time of blood draw (yes/no).