<?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>1885-642X</journal-id>
<journal-title><![CDATA[Pharmacy Practice (Granada)]]></journal-title>
<abbrev-journal-title><![CDATA[Pharmacy Pract (Granada)]]></abbrev-journal-title>
<issn>1885-642X</issn>
<publisher>
<publisher-name><![CDATA[Centro de Investigaciones y Publicaciones Farmacéuticas]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1885-642X2017000100013</article-id>
<article-id pub-id-type="doi">10.18549/pharmpract.2017.01.943</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Network meta-analysis: a technique to gather evidence from direct and indirect comparisons]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tonin]]></surname>
<given-names><![CDATA[Fernanda S.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rotta]]></surname>
<given-names><![CDATA[Inajara]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mendes]]></surname>
<given-names><![CDATA[Antonio M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pontarolo]]></surname>
<given-names><![CDATA[Roberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Federal University of Paraná Pharmaceutical Sciences Postgraduate Programme ]]></institution>
<addr-line><![CDATA[Curitiba ]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Federal University of Paraná Hospital de Clínicas Pharmacy Service]]></institution>
<addr-line><![CDATA[Curitiba ]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Federal University of Paraná Pharmaceutical Sciences Postgraduate Programme ]]></institution>
<addr-line><![CDATA[Curitiba ]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Federal University of Paraná Department of Pharmacy ]]></institution>
<addr-line><![CDATA[Curitiba ]]></addr-line>
<country>Brazil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2017</year>
</pub-date>
<volume>15</volume>
<numero>1</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_arttext&amp;pid=S1885-642X2017000100013&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_abstract&amp;pid=S1885-642X2017000100013&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_pdf&amp;pid=S1885-642X2017000100013&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Systematic reviews and pairwise meta-analyses of randomized controlled trials, at the intersection of clinical medicine, epidemiology and statistics, are positioned at the top of evidence-based practice hierarchy. These are important tools to base drugs approval, clinical protocols and guidelines formulation and for decision-making. However, this traditional technique only partially yield information that clinicians, patients and policy-makers need to make informed decisions, since it usually compares only two interventions at the time. In the market, regardless the clinical condition under evaluation, usually many interventions are available and few of them have been studied in head-to-head studies. This scenario precludes conclusions to be drawn from comparisons of all interventions profile (e.g. efficacy and safety). The recent development and introduction of a new technique &#8211; usually referred as network meta-analysis, indirect meta-analysis, multiple or mixed treatment comparisons &#8211; has allowed the estimation of metrics for all possible comparisons in the same model, simultaneously gathering direct and indirect evidence. Over the last years this statistical tool has matured as technique with models available for all types of raw data, producing different pooled effect measures, using both Frequentist and Bayesian frameworks, with different software packages. However, the conduction, report and interpretation of network meta-analysis still poses multiple challenges that should be carefully considered, especially because this technique inherits all assumptions from pairwise meta-analysis but with increased complexity. Thus, we aim to provide a basic explanation of network meta-analysis conduction, highlighting its risks and benefits for evidence-based practice, including information on statistical methods evolution, assumptions and steps for performing the analysis.]]></p></abstract>
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<kwd lng="en"><![CDATA[Treatment Outcome]]></kwd>
<kwd lng="en"><![CDATA[Decision Support Techniques]]></kwd>
</kwd-group>
</article-meta>
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