TITLE

Vitamin D deficiency in Spain: a population-based cohort study

AUTHOR(S)
González-Molero, I; Morcillo, S; Valdés, S; Pérez-Valero, V; Botas, P; Delgado, E; Hernández, D; Olveira, G; Rojo, G; Gutierrez-Repiso, C; Rubio-Martín, E; Menéndez, E; Soriguer, F
PUB. DATE
March 2011
SOURCE
European Journal of Clinical Nutrition;Mar2011, Vol. 65 Issue 3, p321
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Background:Vitamin D deficiency is common worldwide. No homogenous reference values have yet been established and no studies of values have been conducted in Spain involving a large number of participants.Objective:To study the population concentrations of vitamin D in a representative sample of the Spanish population.Subjects/Methods:The study involved two cohorts from Spain, the Asturias study and the Pizarra study, which are two prospective, population-based studies involving 2260 participants. In 1262 subjects (age: 20-83 years) we studied 25-hydroxyvitamin D, intact parathyroid hormone (iPTH), calcium, phosphorus and creatinine.Results:The median population values of 25-hydroxyvitamin D and iPTH were 22.46 ng/ml and 42.29 pg/ml, respectively. The values of 25-hydroxyvitamin D were significantly higher in summer and correlated with age (β=−0.05±0.01, P<0.0001), creatinine (β=6.42±1.17, P<0.0001) and iPTH (−0.07±0.01, P<0.0001), but not with calcium, phosphorus or sex. The increase in iPTH with age was seen whatever the values of 25-hydroxyvitamin D, and was greater in the older persons. The concentration of iPTH rose continuously with effect from 25-hydroxyvitamin D values below ≈30 ng/ml. Values above ≈35 ng/ml were associated with a significantly lower concentration of iPTH.Conclusions:One-third (33.9%) of the Spanish population may be at risk for Vitamin D deficiency. The 25-hydroxyvitamin D values above 30 ng/ml can safely discard 'hyper PTH'. The increase in iPTH concentration is greater in older persons for similar values of 25-hydroxyvitamin D.
ACCESSION #
58731275

 

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