Vitamin D data
Table of Contents
Description
These data come from a large cross-sectional observational study on vitamin D status in four European countries (Andersen et al., 2005). The data provide age, body mass index and vitamin D status for 420 women from 4 European countries. Vitamin D status is given via a measurement of 25-hydroxy-vitamin D (25OHD) in serum and among the questions to be addressed using these data is whether the 25OHD-level depends on BMI and on age.
Variable Names
| Variable | Explanation (Unit) |
|---|---|
| age | age of the individual |
| bmi | body mass index (kg/m2) |
| country | country of residence |
| 1: Denmarka | |
| 2: Finland | |
| 4: Ireland | |
| 6: Poland | |
| category | 1: girls |
| 2: women | |
| vitd | the level of vitamin D (nmol/l), i.e, serum 25-hydroxyvitamin D (S-25OHD) |
| sunexp | sun exposure |
| 1: avoid sun | |
| 2: sometimes | |
| 3: prefer sun | |
| vitdintake | dietary Vitamin D intake (nmol/L, from the food and possiblly supplements) |
Download
| Format | Download |
|---|---|
| text (csv) | vitaminD.csv |
| rda (for R) | vitaminD.rda |
Load data into R
load(url("http://paulblanche.com/files/vitaminD.rda")) head(vitaminD)
References
Andersen, Per Kragh, and Lene Theil Skovgaard. Regression with linear predictors. Springer, 2010.
Andersen R, Molgaard C, Skovgaard LT, Brot C, Cashman KD, Chabros E, Charzewska J, Flynn A, Jakobsen J, Karkkainen M, Kiely M, Lamberg-Allardt C, Moreiras O, Natri AM, O’Brien M, Rogalska-Niedzwiedz M, Ovesen L (2005) Teenage girls and elderly women living in northern Europe have low winter vitamin D status. Eur J Clin Nutr 59:533–41.