Evidence map›Paper›PMID 39345833›Full record

ArticleBMJ open sport & exercise medicine2024

Influence of vitamin D supplementation on muscle strength and exercise capacity in Mongolian schoolchildren: secondary outcomes from a randomised controlled trial.

Davaasambuu Ganmaa, Stephanie Hemmings, David A Jolliffe, Uyanga Buyanjargal, Gantsetseg Garmaa, Unaganshagai Adiya, Tumenulzii Tumurbaatar, Khulan Dorjnamjil, Enkhtsetseg Tserenkhuu, Sumiya Erdenenbaatar and 8 more

Registry-linked trialAbstract read
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In one paragraph

Article in BMJ open sport & exercise medicine, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT02276755 (Vitamin D in TB Prevention in School Age Children), which is not on this map. Cited by 3 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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.

NCT02276755 phase3completednot on this map

Vitamin D in TB Prevention in School Age Children

TypeinterventionalSponsorHarvard School of Public Health (HSPH)Ran2015 to 2020Enrolled8,851ConditionsLatent TuberculosisArmsCholecalciferol (vitamin D3), Placebo
3 · Its place in the literature

Who cites it

3 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Trial
  3. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

18 authors.

Davaasambuu GanmaaHarvard Medical School, Boston, Massachusetts, USA.
Stephanie HemmingsUniversity of Brighton, Brighton, UK.
David A JolliffeBlizard Institute, Queen Mary University of London, London, UK.
Uyanga BuyanjargalMongolian Health Initiative, Ulaanbaatar, Mongolia.
Gantsetseg GarmaaMongolian Health Initiative, Ulaanbaatar, Mongolia.
Unaganshagai AdiyaMongolian Health Initiative, Ulaanbaatar, Mongolia.
Tumenulzii TumurbaatarMongolian Health Initiative, Ulaanbaatar, Mongolia.
Khulan DorjnamjilMongolian Health Initiative, Ulaanbaatar, Mongolia.
Enkhtsetseg TserenkhuuGlobal Laboratory, Ulaanbaatar, Mongolia.
Sumiya ErdenenbaatarMongolian Health Initiative, Ulaanbaatar, Mongolia.
Enkhjargal TsendjavMongolian Health Initiative, Ulaanbaatar, Mongolia.
Nomin EnkhamgalanMongolian Health Initiative, Ulaanbaatar, Mongolia.
Chuluun-Erdene AchtaiMongolian Health Initiative, Ulaanbaatar, Mongolia.
Yagaantsetseg TalhaasurenMongolia Ministry of Health, Ulaanbaatar, Mongolia.
Tuya ByambasurenMongolia Ministry of Health, Ulaanbaatar, Mongolia.
Erdenetuya GanbaatarMongolian National University of Medical Sciences, Ulaanbaatar, Mongolia.
Erkhembulgan PurevdorjMongolian Health Initiative, Ulaanbaatar, Mongolia.
Adrian R MartineauBlizard Institute, Queen Mary University of London, London, UK.ORCID 0000-0001-5387-1721

Funding

Trial of Vitamin D Supplementation to Prevent TB Infection in SchoolchildrenR01HL122624 · NHLBI · HARVARD SCHOOL OF PUBLIC HEALTH · PI DAVAASAMBUU, GANMAA · 2014 to 2018
$3.5M
NHLBI NIH HHS R01 HL122624
6 · The paper itself

Abstract

Objective: To determine whether weekly oral vitamin D supplementation influences grip strength, explosive leg power, cardiorespiratory fitness or spirometric lung volumes in Mongolian schoolchildren. Methods: Multicentre, randomised, placebo-controlled clinical trial conducted in children aged 6-13 years at baseline attending 18 schools in Ulaanbaatar. The intervention was weekly oral doses of 14 000 IU vitamin D Results: 99.8% of participants had serum 25(OH)D concentrations <75 nmol/L at baseline, and mean end-study 25(OH)D concentrations in children randomised to vitamin D versus placebo were 77.4 vs 26.7 nmol/L (mean difference 50.7 nmol/L, 95% CI 49.7 to 51.4). However, vitamin D supplementation did not influence mean grip strength, standing long jump distance, VO Conclusion: A 3-year course of weekly oral supplementation with 14 000 IU vitamin D Trial registration number: NCT02276755.

Indexed as

Children's health and exerciseFitness testingNutrition

Identifiers

PMID39345833
PMCPMC11429264

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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.