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Institute of Medicine (US) Committee to Review Dietary Reference Intakes for Vitamin D and Calcium; Ross AC, Taylor CL, Yaktine AL, et al., editors. Dietary Reference Intakes for Calcium and Vitamin D. Washington (DC): National Academies Press (US); 2011.
Dietary Reference Intakes for Calcium and Vitamin D.
Show details%20and%20UVB%20dose%20rate.%20Surface%20is%20hyperboloid%2C%20plotting%20equation%201%2C%20and%20was%20fitted%20to%20data%20using%20least%20squares%20regression%20methods.&p=BOOKS&id=56061_ch3f5.jpg "Click on image to zoom")
FIGURE 3-5Three-dimensional scatter-plot of 4-week change in serum 25OHD concentration above baseline expressed as a function of both basic skin lightness (L*) and UVB dose rate. Surface is hyperboloid, plotting equation 1, and was fitted to data using least squares regression methods
NOTE: Equation 1 is z = b * x * y, where z is the induced increase in serum 25OHD level from baseline (in nmol/L); x is UVB dose (in mJ/cm2 per session); y is skin lightness (expressed as the L* score value from the reflective meter); and b is the sole parameter to be fitted.
SOURCE: Reprinted with permission from Robert Heaney.
- FIGURE 3-5, Three-dimensional scatter-plot of 4-week change in serum 25OHD conce...FIGURE 3-5, Three-dimensional scatter-plot of 4-week change in serum 25OHD concentration above baseline expressed as a function of both basic skin lightness (L*) and UVB dose rate. Surface is hyperboloid, plotting equation 1, and was fitted to data using least squares regression methods - Dietary Reference Intakes for Calcium and Vitamin D
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