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- W2916645441 abstract "Objectives The objective of this study was to assess vitamin D status of US non-pregnant adults using a standardised assay across 15 mL/min/1.73 m 2 increments of kidney function, report the use of dietary supplements containing vitamin D and assess relationships between vitamin D and markers of bone resorption. Design This study is a cross-sectional evaluation. Setting The study is from the US National Health and Nutrition Evaluation Survey in 2001–2012. Participants The participants were non-institutionalised, non-pregnant adults, age ≥20 years. Primary and secondary outcome measures The primary outcome measure was serum 25OHD evaluated using liquid chromatography-tandem mass spectroscopy traceable to international reference standards. Secondary outcome measures were use of dietary supplements containing vitamin D and the serum intact parathyroid hormone and bone-specific alkaline phosphatase in a subset of participants. Results The median 25OHD concentration in 27 543 US non-pregnant adults was 25.7 ng/mL (range, 2.2–150.0 ng/mL). Vitamin D supplements were used by 38.0%; mean (SE)=757 (43) international units/day. The range of 25OHD concentration across groups, stratified by kidney function, was 23.0–28.1 ng/mL. The lowest concentration of 25OHD observed was in people with higher kidney function (23.0 ng/mL for estimated glomerular filtration rate >105 mL/min/1.73 m 2 ). Only 24% of people not taking a dietary supplement had a 25OHD concentration >30 ng/mL. Serum intact parathyroid hormone inversely correlated with 25OHD within all kidney function groups. Bone-specific alkaline phosphatase was also negatively associated with 25OHD concentration. Conclusions These data indicate that 25OHD concentrations and supplement use may be suboptimal in a significant proportion of the population, across all kidney function levels. The response of bone resorption markers further suggests that 25OHD levels could be improved. Together, these data support a re-evaluation of the 25OHD concentration associated with health in adults." @default.
- W2916645441 created "2019-03-02" @default.
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- W2916645441 date "2019-02-01" @default.
- W2916645441 modified "2023-10-16" @default.
- W2916645441 title "Cross-sectional evaluation of the relationship between vitamin D status and supplement use across levels of kidney function in adults" @default.
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- W2916645441 doi "https://doi.org/10.1136/bmjopen-2018-022471" @default.
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