Meta-analysis of vitamin D supplementation and hemoglobin concentration: methodological faults obscure the interpretation of the data

We read the review by Arabi et al. with great interest which tried to examine the effects of vitamin D supplementation on hemoglobin concentration. It seems that the article suffers from fundamental methodological issues and the conclusions are likely to be erroneous. In this regard, we would like t...

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Autores principales: Zimorovat, Alireza, Mohammadi-Sartang, Mohsen, Barati-Boldaji, Reza, Raeisi-Dehkordi, Hamidreza
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2021
Materias:
Letter to the Editor
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7980619/
https://www.ncbi.nlm.nih.gov/pubmed/33740966
http://dx.doi.org/10.1186/s12937-021-00681-w
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author Zimorovat, Alireza
Mohammadi-Sartang, Mohsen
Barati-Boldaji, Reza
Raeisi-Dehkordi, Hamidreza
author_facet Zimorovat, Alireza
Mohammadi-Sartang, Mohsen
Barati-Boldaji, Reza
Raeisi-Dehkordi, Hamidreza
author_sort Zimorovat, Alireza
collection PubMed
description We read the review by Arabi et al. with great interest which tried to examine the effects of vitamin D supplementation on hemoglobin concentration. It seems that the article suffers from fundamental methodological issues and the conclusions are likely to be erroneous. In this regard, we would like to ask the authors to address the mentioned limitations and to update the analysis in order to provide robust and trustful results. We are concerned that such meta-analyses may lead to the biased findings and conclusions.
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spelling pubmed-79806192021-03-22 Meta-analysis of vitamin D supplementation and hemoglobin concentration: methodological faults obscure the interpretation of the data Zimorovat, Alireza Mohammadi-Sartang, Mohsen Barati-Boldaji, Reza Raeisi-Dehkordi, Hamidreza Nutr J Letter to the Editor We read the review by Arabi et al. with great interest which tried to examine the effects of vitamin D supplementation on hemoglobin concentration. It seems that the article suffers from fundamental methodological issues and the conclusions are likely to be erroneous. In this regard, we would like to ask the authors to address the mentioned limitations and to update the analysis in order to provide robust and trustful results. We are concerned that such meta-analyses may lead to the biased findings and conclusions. BioMed Central 2021-03-19 /pmc/articles/PMC7980619/ /pubmed/33740966 http://dx.doi.org/10.1186/s12937-021-00681-w Text en © The Author(s) 2021 Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.
spellingShingle Letter to the Editor
Zimorovat, Alireza
Mohammadi-Sartang, Mohsen
Barati-Boldaji, Reza
Raeisi-Dehkordi, Hamidreza
Meta-analysis of vitamin D supplementation and hemoglobin concentration: methodological faults obscure the interpretation of the data
title Meta-analysis of vitamin D supplementation and hemoglobin concentration: methodological faults obscure the interpretation of the data
title_full Meta-analysis of vitamin D supplementation and hemoglobin concentration: methodological faults obscure the interpretation of the data
title_fullStr Meta-analysis of vitamin D supplementation and hemoglobin concentration: methodological faults obscure the interpretation of the data
title_full_unstemmed Meta-analysis of vitamin D supplementation and hemoglobin concentration: methodological faults obscure the interpretation of the data
title_short Meta-analysis of vitamin D supplementation and hemoglobin concentration: methodological faults obscure the interpretation of the data
title_sort meta-analysis of vitamin d supplementation and hemoglobin concentration: methodological faults obscure the interpretation of the data
topic Letter to the Editor
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7980619/
https://www.ncbi.nlm.nih.gov/pubmed/33740966
http://dx.doi.org/10.1186/s12937-021-00681-w
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AT baratiboldajireza metaanalysisofvitamindsupplementationandhemoglobinconcentrationmethodologicalfaultsobscuretheinterpretationofthedata
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