<?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>2079-3480</journal-id>
<journal-title><![CDATA[Cuban Journal of Agricultural Science]]></journal-title>
<abbrev-journal-title><![CDATA[Cuban J. Agric. Sci.]]></abbrev-journal-title>
<issn>2079-3480</issn>
<publisher>
<publisher-name><![CDATA[Editorial del Instituto de Ciencia Animal]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2079-34802018000400383</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Scale design for evaluating the methodological quality of studies related to nutritional values of silages for ruminants. Pilot study]]></article-title>
<article-title xml:lang="es"><![CDATA[Diseño de escala para evaluar la calidad metodológica de estudios relacionados con el valor nutritivo de ensilajes para rumiantes. Estudio piloto]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Torres]]></surname>
<given-names><![CDATA[Mildrey]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Herrera]]></surname>
<given-names><![CDATA[Magaly]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto de Ciencia Animal  ]]></institution>
<addr-line><![CDATA[San José de las Lajas Mayabeque]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<volume>52</volume>
<numero>4</numero>
<fpage>383</fpage>
<lpage>388</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2079-34802018000400383&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2079-34802018000400383&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2079-34802018000400383&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract In order to propose a specific scale that allows to evaluate the methodological quality of studies related to chemical composition and nutritional value of silages to be included in meta-analysis, the criteria of PEDro scale were used, referring to sample taking, the randomization of treatments to experimental units and informed statistical information. In addition, other criteria were included, such as the characteristics of forage for silage, description of silage preparation process, used chemical analysis procedures, statistical methods used in the experimentation and the information or not about key variables of chemical and fermentative composition. To identify the criteria that made up the scale, 80 articles were analyzed and, for its validation, 40 articles of the theme were used. For the search and selection of articles, EBSCO, Scielo, Science Direct and Researchgate databases were used, and, to validate the scale, reliability between two evaluators was determined by the intraclass correlation coefficient. The scale proposal assessed 12 criteria and considers that a study is accepted, as of good methodological quality, if it meets 9 or more criteria. Validation between two evaluators, independently, resulted in excellent reliability, with an intraclass correlation coefficient of 0.81 (I.C95 % 0.67-0.89). The new scale thus becomes an appropriate tool, which will minimize biases and improve quality of the selected studies to develop the meta-analysis on this subject.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Para proponer una escala específica que permita evaluar la calidad metodológica de estudios relacionados con la composición química y el valor nutritivo de ensilajes a incluir en meta-análisis, se tomaron los criterios de la escala de PEDro, referidos a la toma de la muestra, la aleatorización de los tratamientos a las unidades experimentales y la información estadística informada. Además, se incorporaron otros criterios, como las características del forraje para ensilar, la descripción del proceso de elaboración del ensilaje, los procedimientos de análisis químico utilizados, los métodos estadísticos que se emplean en la experimentación y el informe o no de variables clave de la composición química y fermentativa. Para identificar los criterios que conformaron la escala, se analizaron 80 artículos y, para su validación, se utilizaron 40 artículos de la temática. Para la búsqueda y selección de los artículos se utilizaron las bases de datos: EBSCO, Scielo, Science Direct y Researchgate, y para validar la escala se determinó la confiabilidad entre dos evaluadores mediante el coeficiente de correlación intraclase. La propuesta de escala valoró 12 criterios y considera que se acepte un estudio, como de buena calidad metodológica, si cumple con 9 o más criterios. La validación entre dos evaluadores, de manera independiente, resultó una fiabilidad excelente, con coeficiente de correlación intraclase de 0.81 (I.C95 % 0.67-0.89). La nueva escala se convierte así en una herramienta apropiada, que permitirá minimizar sesgos y mejorar la calidad de los estudios seleccionados para desarrollar el meta-análisis sobre la temática.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[silage]]></kwd>
<kwd lng="en"><![CDATA[meta-analysis]]></kwd>
<kwd lng="en"><![CDATA[evaluation criteria]]></kwd>
<kwd lng="en"><![CDATA[reliability]]></kwd>
<kwd lng="es"><![CDATA[ensilaje]]></kwd>
<kwd lng="es"><![CDATA[meta-análisis]]></kwd>
<kwd lng="es"><![CDATA[criterios de evaluación]]></kwd>
<kwd lng="es"><![CDATA[fiabilidad]]></kwd>
</kwd-group>
</article-meta>
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