An S-shaped curve that shows that approximately 60 percent of this population has serum 25OHD concentrations above 50 nmol/L.

FIGURE I-6Cumulative distribution of serum 25OHD (QC adjusted) for 31- to 50-year-olds in the United States for the 2003 to 2006 time period

SOURCE: NHANES 2003–2006.

From: I, Proportion of the Population Above and Below 40 nmol/L Serum 25-Hydroxyvitamin D Concentrations and Cumulative Distribution of Serum 25-Hydroxyvitamin D Concentrations: United States and Canada

Cover of Dietary Reference Intakes for Calcium and Vitamin D
Dietary Reference Intakes for Calcium and Vitamin D.
Institute of Medicine (US) Committee to Review Dietary Reference Intakes for Vitamin D and Calcium; Ross AC, Taylor CL, Yaktine AL, et al., editors.
Washington (DC): National Academies Press (US); 2011.
Copyright © 2011, National Academy of Sciences.

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