Figures & data
Table 1. National health and nutrition surveys participating in the Vitamin D Standardization Program (VDSP).
Figure 1. Mean Concentrations of Total plasma 25(OH)D (nmol/L) from the 2007–2009 Canadian Health Measures Survey and serum 25(OH)D (nmol/L) from the 2001–2006 National Health and Nutrition Examination Survey by Age Group. [Citation21] and analysis of NHANES public use data sets, by Sempos CT.
![Figure 1. Mean Concentrations of Total plasma 25(OH)D (nmol/L) from the 2007–2009 Canadian Health Measures Survey and serum 25(OH)D (nmol/L) from the 2001–2006 National Health and Nutrition Examination Survey by Age Group. [Citation21] and analysis of NHANES public use data sets, by Sempos CT.](/cms/asset/e8e4c023-2b80-4b78-9657-c65af5935eca/iclb_a_681935_f0001_b.gif)
Figure 3. Vitamin D Standardization Program (VDSP) Metrological Traceability Plan. Baseline or Interlaboratory Comparison Study Design.
![Figure 3. Vitamin D Standardization Program (VDSP) Metrological Traceability Plan. Baseline or Interlaboratory Comparison Study Design.](/cms/asset/d3bdfea9-d214-489b-a564-fcb5d6890fdd/iclb_a_681935_f0003_b.gif)
Figure 4. Centers for Disease Control and Prevention (CDC) Certification Program. Vitamin D Standardization Scheme.
![Figure 4. Centers for Disease Control and Prevention (CDC) Certification Program. Vitamin D Standardization Scheme.](/cms/asset/963e2144-4a65-4ca9-a10a-718ecedb4de3/iclb_a_681935_f0004_b.gif)