<?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>2174-5145</journal-id>
<journal-title><![CDATA[Revista Española de Nutrición Humana y Dietética]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Esp Nutr Hum Diet]]></abbrev-journal-title>
<issn>2174-5145</issn>
<publisher>
<publisher-name><![CDATA[Academia Española de Nutrición y Dietética]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2174-51452021000300294</article-id>
<article-id pub-id-type="doi">10.14306/renhyd.25.3.1244</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Reproducibility and validity ELSA-Brasil Food Frequency Questionnaire]]></article-title>
<article-title xml:lang="es"><![CDATA[Reproducibilidad y validez del cuestionario de frecuencia alimentaria ELSA-Brasil]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martinez]]></surname>
<given-names><![CDATA[Oscar Geovanny Enriquez]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aprelini]]></surname>
<given-names><![CDATA[Carla Moronari de Oliveira]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Moreira]]></surname>
<given-names><![CDATA[Taiz Karla Brunetti]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alves]]></surname>
<given-names><![CDATA[Silian Angela Ávila]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pereira]]></surname>
<given-names><![CDATA[Taísa Sabrina Silva]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Siqueira]]></surname>
<given-names><![CDATA[Jordana Herzog]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ferriani]]></surname>
<given-names><![CDATA[Lara Onofre]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Faria]]></surname>
<given-names><![CDATA[Carolina Perim de]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bisi Molina]]></surname>
<given-names><![CDATA[Maria del Carmen]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Federal University of Espírito Santo Health Sciences Center Public Health Program]]></institution>
<addr-line><![CDATA[Vitória ]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,University of the Americas Puebla  ]]></institution>
<addr-line><![CDATA[San Andrés Cholula ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Federal University of Ouro Preto Health and Nutrition Program ]]></institution>
<addr-line><![CDATA[Ouro Preto ]]></addr-line>
<country>Brazil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2021</year>
</pub-date>
<volume>25</volume>
<numero>3</numero>
<fpage>294</fpage>
<lpage>302</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_arttext&amp;pid=S2174-51452021000300294&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_abstract&amp;pid=S2174-51452021000300294&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_pdf&amp;pid=S2174-51452021000300294&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction  To investigate the association between diet and health effects in population surveys, it is necessary to have precise tools that allow estimating the habitual consumption of the population. Aim: To evaluate the reproducibility and validity of the ELSA-Brasil food frequency questionnaire (FFQ) to assess macro and micronutrients intake.  Material and Methods  We collected dietary information of 281 participants which completed two ELSA-Brasil food frequency questionnaires over a year period and three records. To assess the reproducibility of the FFQ, we compared the macro and micronutrients intake from the two FFQ while to assess the validity, we compared the intakes of FFQ with the mean of three records. The intraclass correlation test (ICC) and agreement percentages of nutrient intake were calculated after categorization by tertiles.  Results  ICC coefficients for reproducibility ranged from 0.51 (polyunsaturated fat) to 0.70 (magnesium) while the ICC coefficients for validity ranged from 0.14 to 0.61 for omega 3 and magnesium, respectively. The exact concordances between methods ranged from 37% for omega 3 to 50.2% for magnesium (mean=44.6%). An average disagreement of 13.4% was found.  Conclusions  This study suggests that the ELSA-Brasil FFQ is suitable tool to assess dietary intake with a satisfactory reproducibility and relative validity.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción  Para investigar la asociación entre dieta y efectos en salud en encuestas poblacionales, es necesario disponer de herramientas precisas que permitan estimar el consumo habitual de la población. Objetivo: Evaluar la reproducibilidad y validez del cuestionario de frecuencia alimentaria (FFQ) del ELSA-Brasil para evaluar la ingesta de macro y micronutrientes.  Material y Métodos  Recopilamos información dietética de 281 participantes que completaron dos cuestionarios de frecuencia alimentaria del ELSA-Brasil durante un período de un año y tres registros. Para evaluar la reproducibilidad del FFQ, comparamos la ingesta de macro y micronutrientes de los dos FFQ mientras que, para evaluar la validez, comparamos las ingestas de FFQ con la media de tres registros. La prueba de correlación intraclase (ICC) y los porcentajes de acuerdo de la ingesta de nutrientes se calcularon después de la categorización por tertiles.  Resultados  En la evaluación de la reproducibilidad, los coeficientes ICC variaron de 0,51-0,70 para magnesio de grasas poliinsaturadas, respectivamente; en la evaluación de la validez, oscilaron entre 0,14 y 0,61 para omega 3 y magnesio, respectivamente. Las concordancias exactas entre los métodos oscilaron entre el 37% para omega 3 y el 50,2% para magnesio (media=44,6%). Se encontró un desacuerdo promedio del 13,4%.  Conclusiones  Este estudio sugiere que ELSA-Brasil FFQ es una herramienta adecuada para evaluar la ingesta dietética con una reproducibilidad satisfactoria y validez relativa.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Diet]]></kwd>
<kwd lng="en"><![CDATA[Reproducibility of Results]]></kwd>
<kwd lng="en"><![CDATA[Validation Study]]></kwd>
<kwd lng="en"><![CDATA[Surveys and Questionnaires]]></kwd>
<kwd lng="es"><![CDATA[Dieta]]></kwd>
<kwd lng="es"><![CDATA[Reproducibilidad de los Resultados]]></kwd>
<kwd lng="es"><![CDATA[Estudio de Validación]]></kwd>
<kwd lng="es"><![CDATA[Encuestas y Cuestionarios]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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