Evidence map›Paper›PMID 26692013›Full record

Trial reportPloS one2015

Re-Examining the Association between Vitamin D and Childhood Caries.

Tom Dudding, Steve J Thomas, Karen Duncan, Debbie A Lawlor, Nicholas J Timpson

Registry-linked trialOpen access · goldAbstract readMulticenter StudyRandomized Controlled Trial
In one paragraph

Trial report in PloS one, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT03158155 (Prevalence of Early Childhood Caries in Egyptian Children With Serum Vitamin D Deficiency.), which is not on this map. Cited by 23 papers, 7 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed, 7 pooled it
2.0field-weighted citation impact, top 14% 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.

NCT03158155 unknown statusnot on this mapstarted 2017, after this paper: background citation

Prevalence of Early Childhood Caries in Egyptian Children With Serum Vitamin D Deficiency.

Typeobservational_patient_registrySponsorNancy Ahmed El SalmawyRan2017 to 2018Enrolled288ConditionsVitamin D Deficiency
3 · Its place in the literature

Who cites it

23 citing papers in PubMed, 7 syntheses or guidelines pooled it, 48 citations in OpenAlex.

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  7. The Role of Vitamins in Oral Health. A Systematic Review and Meta-Analysis.International journal of environmental research and public health · 2020
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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

5 authors at 2 institutions in 1 country.

Tom DuddingMRC Integrative Epidemiology Unit, School of Community and Social Medicine, University of Bristol, Bristol, United Kingdom.
Steve J ThomasSchool of Oral and Dental Science, Bristol University, Bristol, United Kingdom.
Karen DuncanSchool of Oral and Dental Science, Bristol University, Bristol, United Kingdom.
Debbie A LawlorMRC Integrative Epidemiology Unit, School of Community and Social Medicine, University of Bristol, Bristol, United Kingdom.
Nicholas J TimpsonMRC Integrative Epidemiology Unit, School of Community and Social Medicine, University of Bristol, Bristol, United Kingdom.
University of Bristol · GBUniversity Of Bristol Dental Hospital · GB

Funding

Medical Research Council G0701603Medical Research Council MC_PC_15018Medical Research Council MC_UU_12013/3Medical Research Council MC_UU_12013/5Wellcome Trust 102215Wellcome Trust 102215/2/13/2
6 · The paper itself

Abstract

backgroundPrevious studies have reported an inverse association between vitamin D and childhood dental caries, but whether this is causal is unclear.

objectiveTo determine the causal effect of circulating 25-hydroxyvitamin D concentration on dental caries experience, early caries onset and the requirement for a dental general anesthetic.

designA Mendelian randomization study was undertaken, using genetic variants known to be associated with circulating 25-hydroxyvitamin D concentrations in 5,545 European origin children from the South West of England. Data on caries and related characteristics were obtained from parental and child completed questionnaires between 38 and 91 months and clinical assessments in a random 10% sample at 31, 44 and 61 months.

resultsIn multivariable confounder adjusted analyses no strong evidence for an association of 25-hydroxyvitamin D with caries experience or severity was found but there was evidence for an association with early caries onset, or having a general anesthetic for dental problems. In Mendelian randomization analysis the odds ratio for caries experience per 10 nmol/L increase in 25-hydroxyvitamin D was 0.93 (95% confidence interval: 0.83, 1.05; P = 0.26) and the odds ratio for dental general anaesthetic per 10 nmol/L increase in 25-hydroxyvitamin D was 0.96 (95% confidence interval: 0.75, 1.22; P = 0.72).

conclusionsThis Mendelian randomization study provides little evidence to support an inverse causal effect of 25-hydroxyvitamin D on dental caries. However, the estimates are imprecise and a larger study is required to refine these analyses.

Indexed as

Surveys and QuestionnairesChildChild, PreschoolDental CariesEnglandFemaleFollow-Up StudiesHumansHydroxycholecalciferolsMaleHydroxycholecalciferols

Identifiers

PMID26692013
PMCPMC4686942
OpenAlexW2216913878

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

Registered trials

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.