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Vitamin D Status in a Rural Postmenopausal Female Population

Joan M. Lappe, PhD, RN, K. Michael Davies, PhD, Dianne Travers-Gustafson, MS, RN, CS and Robert P. Heaney, MD

Creighton University, Osteoporosis Research Center, Omaha, Nebraska


Figure 1
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  		Fig. 1. Frequency distribution of seasonally adjusted 25(OH)D values in a rural cohort of women aged 55 and older. N = 1179. The smooth curve is the best fit Gaussian curve for the distribution. (Copyright, Robert P. Heaney, 2005. Used with permission.)

 

Figure 2
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  		Fig. 2. Plot of serum 25(OH)D concentrations as a function of supplemental vitamin D intake. N = 1179. The diagonal line is the least squares best fit regression line through the data, together with its confidence interval. (To convert IU to µg, divide the horizontal axis values by 40.) (Copyright, Robert P. Heaney, 2005. Used with permission.)

 

Figure 3
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  		Fig. 3. Plot of serum PTH as a function of serum 25(OH)D. The solid line is the best fit regression line through the data using an exponentially decreasing model. (Copyright, Robert P. Heaney, 2005. Used with permission.)

 

Figure 4
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  		Fig. 4. Plot of the least-squares regression lines for a three-parameter exponential fit describing the relationship of serum PTH to serum 25(OH)D for normal weight, overweight, and obese women in our study cohort. The equations are identical in form to that employed in Fig. 3. The general similarity of the three curves is evident. (Copyright, Robert P. Heaney, 2005. Used with permission.)

 




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