Marker of vitamin D status in healthy children: Free or total 25-hydroxyvitamin D?

To assess if serum free 25-hydroxyvitamin D (25OHD) is a better indicator of vitamin D status than total 25OHD in healthy children. Cross-sectional prospective clinical study was designed. We measured serum free 25OHD concentrations and its correlation with calculated free 25OHD, total 25OHD, intact...

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Veröffentlicht in:PloS one 2018-08, Vol.13 (8), p.e0202237-e0202237
Hauptverfasser: Mantecón, Laura, Alonso, Mª Agustina, Moya, Vanessa, Andrés, Ana Gloria, Avello, Noelia, Martínez-Morillo, Eduardo, Santos, Fernando
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container_issue 8
container_start_page e0202237
container_title PloS one
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creator Mantecón, Laura
Alonso, Mª Agustina
Moya, Vanessa
Andrés, Ana Gloria
Avello, Noelia
Martínez-Morillo, Eduardo
Santos, Fernando
description To assess if serum free 25-hydroxyvitamin D (25OHD) is a better indicator of vitamin D status than total 25OHD in healthy children. Cross-sectional prospective clinical study was designed. We measured serum free 25OHD concentrations and its correlation with calculated free 25OHD, total 25OHD, intact parathyroid hormone (PTH), and vitamin D binding protein (DBP) in children. The influence of age, sex, ethnicity, body mass index (BMI), season of the year, diet intake, vitamin supplements, time spent outdoors and albumin concentrations on free 25OHD was also analyzed. 241 children aged from 0 days to 14 years, and living in the northern Spain (latitude 43° N), were included. Mean (SD) free 25OHD concentrations were 2.48 (1.39), 5.46 (3.12), 4.12 (1,72), 3.82 (1.43) pg/ml in children aged 0 days, 1 month-2 years, 2-6 years and >6 years, respectively. Correlation between directly measured and calculated free 25OHD was high and significant (r = 0.66) as well as the correlation between serum free and total 25OHD concentrations (r = 0.61). No significant correlation was found between PTH and free 25OHD (r = -0.08). The total 25OHD and PTH concentrations' correlation was inverse (r = -0.25) and significant. Neither free nor total 25OHD concentrations correlated with DBP concentrations. Among the analyzed variables, free 25OHD values were higher in spring/summer than in autumn/winter in children older than 6 years. : These findings do not support that free 25OHD is a better marker of vitamin D deficiency than total 25OHD in healthy pediatric population.
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Cross-sectional prospective clinical study was designed. We measured serum free 25OHD concentrations and its correlation with calculated free 25OHD, total 25OHD, intact parathyroid hormone (PTH), and vitamin D binding protein (DBP) in children. The influence of age, sex, ethnicity, body mass index (BMI), season of the year, diet intake, vitamin supplements, time spent outdoors and albumin concentrations on free 25OHD was also analyzed. 241 children aged from 0 days to 14 years, and living in the northern Spain (latitude 43° N), were included. Mean (SD) free 25OHD concentrations were 2.48 (1.39), 5.46 (3.12), 4.12 (1,72), 3.82 (1.43) pg/ml in children aged 0 days, 1 month-2 years, 2-6 years and &gt;6 years, respectively. Correlation between directly measured and calculated free 25OHD was high and significant (r = 0.66) as well as the correlation between serum free and total 25OHD concentrations (r = 0.61). No significant correlation was found between PTH and free 25OHD (r = -0.08). The total 25OHD and PTH concentrations' correlation was inverse (r = -0.25) and significant. Neither free nor total 25OHD concentrations correlated with DBP concentrations. 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subjects 25-Hydroxyvitamin D
Adult children
Alonso, Fernando
Analysis
Binding proteins
Bioavailability
Biochemistry
Biological markers
Biology and Life Sciences
Body mass
Body mass index
Body size
Bone density
Children
Correlation
Correlation analysis
Dietary supplements
Health aspects
Health services
Hormones
Hypotheses
Mathematical analysis
Medicine and Health Sciences
Metabolism
Minority & ethnic groups
Newborn babies
Nutrient deficiency
Parathyroid
Parathyroid hormone
Pediatrics
People and Places
Physical sciences
Proteins
Studies
Vitamin D
Vitamin deficiency
title Marker of vitamin D status in healthy children: Free or total 25-hydroxyvitamin D?
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