Investigating the patterns and determinants of seasonal variation in Vitamin D status in Australian adults: The Seasonal D Cohort Study

Laura King, Keith Dear, Simone L. Harrison, Ingrid Van Der Mei, Alison M. Brodie, Michael G. Kimlin, Robyn M. Lucas*

*Corresponding author for this work

Research output: Contribution to journalArticleResearchpeer-review

13 Citations (Scopus)
12 Downloads (Pure)

Abstract

Background: 

Vitamin D status generally varies seasonally with changing solar UVB radiation, time in the sun, amount of skin exposed, and, possibly, diet. The Seasonal D Study was designed to quantify the amplitude and phase of seasonal variation in the serum concentration of 25-hydroxyvitamin D, (25OH)D)) and identify the determinants of the amplitude and phase and those of inter-individual variability in seasonal pattern. 

Methods: 

The Seasonal D Study collected data 2-monthly for 12 months, including demographics, personal sun exposure using a diary and polysulphone dosimeters over 7 days, and blood for serum 25(OH)D concentration. The study recruited 333 adults aged 18-79 years living in Canberra (35°S, n = 168) and Brisbane (27°South, n = 165), Australia. 

Discussion: 

We report the study design and cohort description for the Seasonal D Study. The study has collected a wealth of data to examine inter- and intra-individual seasonal variation in vitamin D status and serum 25(OH)D levels in Australian adults.

Original languageEnglish
Article number892
JournalBMC Public Health
Volume16
Issue number1
DOIs
Publication statusPublished - 26 Aug 2016
Externally publishedYes

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