Trial reportJournal of bone and mineral metabolism2017
The role of serum total and free 25-hydroxyvitamin D and PTH values in defining vitamin D status at the end of winter: a representative survey.
Trial report in Journal of bone and mineral metabolism, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
10 citing papers in PubMed, 23 citations in OpenAlex.
- Randomized clinical trial to comparing efficacy of daily, weekly and monthly administration of vitamin DEndocrine · 2017Trial
- The Relationship between Bone Health Parameters, Vitamin D and Iron Status, and Dietary Calcium Intake in Young Males.Nutrients · 2024Article
- Reconsidering vitamin D optimal values based on parathyroid hormone levels in a North Algerian cohort: stratification by gender and season.Archives of osteoporosis · 2022Article
- Vitamin D food fortification in European countries: the underused potential to prevent cancer deaths.European journal of epidemiology · 2022Review
- Incidence rate of vitamin D deficiency and FGF23 levels in 12- to 13-year-old adolescents in Japan.Journal of bone and mineral metabolism · 2021Article
- Genetic variants of VDR and CYP2R1 affect BMI independently of serum vitamin D concentrations.BMC medical genetics · 2020Article
- Evaluation of Vitamin D Fractions in Obese Hypertensive Patients.International journal of environmental research and public health · 2020Article
- Lower serum 25-hydroxyvitamin D3 concentration is associated with higher pain and disability in subjects with low back pain: a case-control study.BMC research notes · 2019Article
- Vitamin D Binding Protein and the Biological Activity of Vitamin D.Frontiers in endocrinology · 2019Review
- Directly measured free 25-hydroxy vitamin D levels show no evidence of vitamin D deficiency in young Swedish women with anorexia nervosa.Eating and weight disorders : EWD · 2018Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
10 authors at 4 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
We sought the lowest serum total 25-hydroxyvitamin D (t-25OHD) values in geographic areas with four seasons and investigated whether the calculation of serum free 25-hydroxyvitamin D (f-25OHD) could provide additional information on vitamin D status. This is a representative, cross-sectional study restricted to a sampling period at the end of winter, using a non-probability, stratified sample of the adult community-dwelling Hungarian population (n = 882). We measured t-25OHD, vitamin D binding protein (DBP), parathyroid hormone (PTH), and albumin levels. f-25OHD concentrations were calculated. We assessed environmental factors that could affect vitamin D levels and diseases possibly related to vitamin D deficiency. Mean t-25OHD values of the total population were 41.3 ± 20.6 nmol/L. t-25OHD levels were below 75, 50, and 30 nmol/L in 97, 77, and 34 % of participants not receiving vitamin D supplementation, respectively. t-25OHD values weakly positively correlated with DBP (r = 0.174; p = 0.000), strongly with f-25OHD (r = 0.70; p = 0.000). The association between t-25OHD and f-25OHD and between t-25OHD and PTH were non-linear (p
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