Evidence map›Paper›PMID 26346690›Full record

ArticleMultidisciplinary respiratory medicine2015

Association of vitamin D receptor gene polymorphisms and vitamin D levels with asthma and atopy in Cypriot adolescents: a case-control study.

Anna Papadopoulou, Panayiotis Kouis, Nikos Middleton, Ourania Kolokotroni, Themistokles Karpathios, Polyxeni Nicolaidou, Panayiotis K Yiallouros

Open access · goldAbstract read
In one paragraph

Article in Multidisciplinary respiratory medicine, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed, 1 pooled it
2.4field-weighted citation impact, top 12% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

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.

2 · The registry

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.

3 · Its place in the literature

Who cites it

22 citing papers in PubMed, 1 synthesis or guideline pooled it, 43 citations in OpenAlex.

  1. Pooled it
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  4. Exploring the Influence ofJournal of personalized medicine · 2023
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  6. Review
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  9. Vitamin D receptor gene polymorphisms in atopy.Immunity, inflammation and disease · 2021
    Review
  10. Journal of personalized medicine · 2021
    Article
  11. Article
  12. Article
  13. Review
  14. Article
  15. Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 3 institutions in 2 countries.

Anna PapadopoulouThird Department of Pediatrics, Athens University Medical School, University General Hospital "Attikon", Athens, Greece.
Panayiotis KouisCyprus International Institute for Environmental & Public Health in association with Harvard School of Public Health, Cyprus University of Technology, Limassol, Cyprus.
Nikos MiddletonDepartment of Nursing, School of Health Sciences, Cyprus University of Technology, Limassol, Cyprus.
Ourania KolokotroniCyprus International Institute for Environmental & Public Health in association with Harvard School of Public Health, Cyprus University of Technology, Limassol, Cyprus ; Department of Nursing, School of Health Sciences, Cyprus University of Technology, Limassol, Cyprus ; St George University of London Medical Programme, University of Nicosia, Nicosia, Cyprus.
Themistokles KarpathiosAthens University Medical School, Athens, Greece.
Polyxeni NicolaidouAthens University Medical School, Athens, Greece.
Panayiotis K YiallourosCyprus International Institute for Environmental & Public Health in association with Harvard School of Public Health, Cyprus University of Technology, Limassol, Cyprus ; Department of Pediatrics, Hospital "Archbishop Makarios III", Nicosia, Cyprus ; 95 Irenes Street, 3041 Limassol, Cyprus.
Cyprus University of Technology · CYAthens Medical Center · GRUniversity General Hospital Attikon · GR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundPolymorphisms in the vitamin D receptor (VDR) gene have been studied in immune-related disorders either as independent contributors or in combination with vitamin D concentration. Vitamin D and VDR have been independently linked to asthma susceptibility. We investigated whether VDR variants were associated independently or in relation to vitamin D levels with asthma in Cypriot adolescents.

methodsWe studied 190 current wheezers, 69 of which were categorized as active asthmatics and 671 healthy controls. We determined three VDR genotypes (BsmI, TaqI, ApaI) and measured serum 25(OH)D levels. Logistic regression and stratified analyses by the presence of hypovitaminosis D (≤20 ng/ml) were used to evaluate the association of the VDR variants with asthma.

resultsThe distribution of TaqI genotypes was significantly different between controls and current wheezers (p = 0.030) or active asthmatics (p = 0.014). The tt genotype was over-represented in wheezers (19.2 %) and asthmatics (21.3 %) compared to respective controls (12.9 %). No difference was observed between controls, current wheezers and active asthmatics in the genotypic distribution of BsmI and ApaI polymorphic sites. After stratification by the presence of hypovitaminosis D, a significant association was detected between tt genotype of TaqI polymorphism with wheezing (OR: 1.97, 95 % CI: 1.12, 3.46) and asthma (OR: 2.37, 95CI%: 1.02, 5.52) only in those with normal vitamin D levels (>20 ng/ml) but not in subjects with low vitamin D.

conclusionsThe minor TaqI genotype of VDR is associated with asthma in Cypriot adolescents. This polymorphism may contribute to asthma susceptibility primarily under conditions of normal vitamin D levels (>20 ng/ml).

Indexed as

AdolescentsAsthmaPolymorphismsVDRVitamin D

Identifiers

PMID26346690
PMCPMC4559891
OpenAlexW2136293149

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.