Evidence map›Paper›PMID 29479197›Full record

ArticlePaediatrics & child health2017

Prevalence and predictors of low serum 25-hydroxyvitamin D levels in rural Canadian children.

Michelle Science, Jonathon L Maguire, Margaret L Russell, Marek Smieja, Stephen D Walter, Mark Loeb

Open access · bronzeAbstract read
In one paragraph

Article in Paediatrics & child health, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed
2.2field-weighted citation impact, top 13% 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

4 citing papers in PubMed, 18 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Observational
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

6 authors at 5 institutions in 2 countries.

Michelle ScienceDivision of Infectious Diseases, The Hospital for Sick Children, Toronto, Ontario.
Jonathon L MaguireApplied Health Research Centre, Li Ka Shing Knowledge Institute of St. Michael's Hospital, Toronto, Ontario.
Margaret L RussellDepartment of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta.
Marek SmiejaDepartment of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton Health Sciences, Hamilton, Ontario.
Stephen D WalterDepartment of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton Health Sciences, Hamilton, Ontario.
Mark LoebDepartment of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton Health Sciences, Hamilton, Ontario.
McMaster University · CAHamilton Health Sciences · CAHospital for Sick Children · CAUniversity of Calgary · CAUniversity of Toronto · CA

Funding

A randomized trial of influenza vaccination of Hutterite childrenU01AI076208 · NIAID · MCMASTER UNIVERSITY · PI LOEB, MARK · 2008 to 2010
$1.5M
NIAID NIH HHS U01 AI076208
6 · The paper itself

Abstract

objectivesStudies in Canada have reported varying prevalences of low serum 25-hydroxyvitamin D (25(OH)D) levels, but none have been conducted in rural paediatric populations. The purpose of this study was to determine the prevalence and predictors of low vitamin D levels in rural communities.

methodsWe conducted a cross-sectional study of children aged 3 to 15 living in Canadian Hutterite communities. Serum 25(OH)D levels were measured between October 2008 and April 2009 using a chemiluminescence assay. Predictors of vitamin D levels were evaluated using multivariable linear regression. A multilevel model was used to evaluate the impact of individual, household and colony factors on the variation in vitamin D levels.

resultsSerum 25(OH)D levels were available on 743 children/adolescents. The median was 62.0 nmol/L (interquartile range 51.0, 74.0). Levels lower than 50 nmol/L and 75 nmol/L were found in 152 (20.5%) and 565 (76%) children, respectively. Adolescents were at highest risk for levels <75 nmol/L (odds ratio 3.38, 95% confidence interval 2.00, 5.80). Age and latitude were negatively correlated with serum 25(OH)D level. In the multilevel model, most of the variation in levels was associated with individual children.

conclusionLow vitamin D levels are a significant problem in rural Hutterite communities in Canada. Adolescents were at greatest risk for low levels and represent an important target group for supplementation. Variation in serum 25(OH)D levels was explained mostly at the individual level. Additional studies are needed to explore factors associated with individuals (e.g., genetics) leading to lower 25(OH)D levels.

Indexed as

CanadaNutrition disordersPrimary careSerum 25-hydroxyvitamin DVitamin D.

Identifiers

PMID29479197
PMCPMC5804950
OpenAlexW2615817100

What OpenQuestion holds

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Registered trials

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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.