Maternal and cord serum 25-hydroxyvitamin D and serum parathyroid hormone concentration at baseline and delivery. (A) Maternal and cord serum 25-hydroxyvitamin D (25(OH)D) concentrations, and (B) maternal serum parathyroid hormone (PTH) concentrations. Kernel density plots, boxplots and jittered scatterplots illustrate the distribution of each subgroup. The limits of the box indicate the 25th and 75thpercentiles, and the black horizontal line within the box represents the median. (A) Black horizontal line within the scatterplot represents the mean; (B) the black horizontal line within the scatterplot represents the geometric mean.
Roth et al. Nutrition Journal 2013 12:47 doi:10.1186/1475-2891-12-47