Open AccessHigh Prevalence of Vitamin D Insufficiency in Farming and Nonfarming Populations in South Dakota
Author(s) -
Lee A. Weidauer,
Lacey McCormack,
Brittany K. GorresMartens,
Bonny L. Specker
Publication year - 2016
Publication title -
topics in clinical nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.151
H-Index - 13
eISSN - 1550-5146
pISSN - 0883-5691
DOI - 10.1097/tin.0000000000000073
Subject(s) - vitamin d and neurology , parathyroid hormone , medicine , endocrinology , vitamin d deficiency , sunlight , agriculture , bone mineral , physiology , biology , calcium , osteoporosis , ecology , physics , astronomy
The purpose of this study was to investigate the role of lifestyle (farming vs nonfarming), age, season, and percent body fat on serum 25-hydroxyvitamin D (25-OHD) and parathyroid hormone (PTH). Serum 25-OHD concentrations were lower in winter than in summer and in older than in younger individuals. Dietary intake of vitamin D was associated with greater serum 25-OHD concentrations. A significant inverse relationship between PTH and 25-OHD was observed in older but not younger individuals. Trabecular volumetric bone mineral density was inversely associated with serum PTH, but not 25-OHD concentrations. Modern farm practices do not necessitate excessive sunlight exposure and that may help explain the lack of differences between farming and nonfarming populations.