<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0120-4157</journal-id>
<journal-title><![CDATA[Biomédica]]></journal-title>
<abbrev-journal-title><![CDATA[Biomédica]]></abbrev-journal-title>
<issn>0120-4157</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Salud]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-41572018000500043</article-id>
<article-id pub-id-type="doi">10.7705/biomedica.v38i0.3683</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Vitamina D y riesgo de preeclampsia: revisión sistemática y metaanálisis]]></article-title>
<article-title xml:lang="en"><![CDATA[Vitamin D and risk of preeclampsia: A systematic review and meta-analysis]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Serrano-Díaz]]></surname>
<given-names><![CDATA[Norma Cecilia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gamboa-Delgado]]></surname>
<given-names><![CDATA[Edna Magaly]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Domínguez-Urrego]]></surname>
<given-names><![CDATA[Clara Lucía]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vesga-Varela]]></surname>
<given-names><![CDATA[Andrea Liliana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Serrano-Gómez]]></surname>
<given-names><![CDATA[Sergio Eduardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Quintero-Lesmes]]></surname>
<given-names><![CDATA[Doris Cristina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Fundación Cardiovascular de Colombia Grupo de Investigación Biomédica Traslacional ]]></institution>
<addr-line><![CDATA[Bucaramanga ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Industrial de Santander Grupo de Investigación en Demografía, Salud Pública y Sistemas de Salud ]]></institution>
<addr-line><![CDATA[Bucaramanga ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Fundación Cardiovascular de Colombia Grupo de Investigación en Estudios Epidemiológicos y de Salud Pública ]]></institution>
<addr-line><![CDATA[Bucaramanga ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Grupo Latinoamericano de Investigaciones Epidemiológicas  ]]></institution>
<addr-line><![CDATA[Bucaramanga ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad Autónoma de Bucaramanga Grupo de Investigaciones Clínicas ]]></institution>
<addr-line><![CDATA[Bucaramanga ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>05</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>05</month>
<year>2018</year>
</pub-date>
<volume>38</volume>
<fpage>43</fpage>
<lpage>53</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-41572018000500043&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-41572018000500043&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-41572018000500043&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción.  Cada vez son más los hallazgos sobre la relación entre las concentraciones de vitamina D en el ser humano y diversas condiciones clínicas. Hay una gran cantidad de estudios que informan sobre dicha asociación, especialmente con complicaciones obstétricas, incluidas la preeclampsia y la diabetes mellitus de la gestación, entre otras, pero sus resultados todavía no son definitivos, por lo que se requieren estudios de intervención de calidad que confirmen la relación de la vitamina D con dichos resultados.  Objetivo.  Revisar la información plasmada en estudios en torno al papel de la vitamina D materna y el desarrollo de la preeclampsia.  Materiales y métodos.  La metodología usada siguió las recomendaciones de la guía Cochrane para la elaboración de revisiones sistemáticas y de la guía del grupo Meta-analysis of Observational Studies in Epidemiology (MOOSE) para los metaanálisis. La búsqueda incluyó estudios observacionales y ensayos clínicos controlados.  Resultados.  Los niveles bajos de vitamina D, medida con el examen de 25-hidroxivitamina D, son comunes en el embarazo. Los resultados de esta revisión sistemática y del metaanálisis sugieren una asociación inversa entre los niveles de vitamina D y el desarrollo de preeclampsia. Hubo heterogeneidad en los estudios en cuanto a su diseño, población y ubicación geográfica, así como a las definiciones de exposición y resultado. Los ensayos clínicos controlados aleatorizados se excluyeron del metaanálisis.  Conclusión.  Se encontró una asociación inversa que sugiere que, a mayores concentraciones de vitamina D, menor es la probabilidad de desarrollar preclampsia, a pesar de la heterogeneidad de la medida global en este tipo de análisis.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction:  Human vitamin D levels have been increasingly related to a wide range of clinical outcomes. There is a large amount of reports on its associations, especially with obstetric complications, including preeclampsia and gestational diabetes. These results are scarcely consistent and there is still a lack of quality intervention studies to confirm the role of vitamin D in those outcomes.  Objective: To review the available scientific evidence on the role of maternal vitamin D in the development of preeclampsia.  Materials and methods: The methodology used followed the recommendations of the Cochrane guide for the preparation of systematic reviews, and for metaanalysis, the Guide of the Metaanalysis of Observational Studies in Epidemiology group (MOOSE). The search included both observational studies and controlled clinical trials.  Results: Low vitamin D levels, measured by the 25-hydroxyvitamin D test, are common in pregnancy. The results of this systematic review and metaanalysis suggest an inverse ratio between vitamin D levels and the development of preeclampsia. There was heterogeneity among the studies with regard to the design, population, geographic location, definitions of exposure, and the outcome. We excluded randomized controlled trials from this meta-analysis.  Conclusion: The inverse association we found suggests that the higher the levels of vitamin D the lesser the probability of developing preeclampsia, in spite of the heterogeneity of the global measurement in this type of analysis.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[vitamina D]]></kwd>
<kwd lng="es"><![CDATA[preeclampsia]]></kwd>
<kwd lng="es"><![CDATA[colecalciferol]]></kwd>
<kwd lng="es"><![CDATA[calcitriol]]></kwd>
<kwd lng="es"><![CDATA[calcifediol]]></kwd>
<kwd lng="es"><![CDATA[embarazo]]></kwd>
<kwd lng="es"><![CDATA[revisión]]></kwd>
<kwd lng="es"><![CDATA[metanálisis]]></kwd>
<kwd lng="en"><![CDATA[Vitamin D]]></kwd>
<kwd lng="en"><![CDATA[preeclampsia]]></kwd>
<kwd lng="en"><![CDATA[cholecalciferol]]></kwd>
<kwd lng="en"><![CDATA[calcitriol]]></kwd>
<kwd lng="en"><![CDATA[calcifediol]]></kwd>
<kwd lng="en"><![CDATA[pregnancy]]></kwd>
<kwd lng="en"><![CDATA[review]]></kwd>
<kwd lng="en"><![CDATA[metaanalysis]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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<article-title xml:lang=""><![CDATA[UK Food Standards Agency Workshop Consensus Report: The choice of method for measuring 25-hydroxyvitamin D to estimate vitamin D status for the UK National Diet and Nutrition Survey]]></article-title>
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