<?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>0016-3813</journal-id>
<journal-title><![CDATA[Gaceta médica de México]]></journal-title>
<abbrev-journal-title><![CDATA[Gac. Méd. Méx]]></abbrev-journal-title>
<issn>0016-3813</issn>
<publisher>
<publisher-name><![CDATA[Academia Nacional de Medicina de México A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0016-38132025000200009</article-id>
<article-id pub-id-type="doi">10.24875/gmm.m25000962</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[El Índice Pronóstico Nutricional predice resultados postoperatorios adversos en pacientes sometidos a cirugía toracoscópica asistida por video por una etiología infecciosa]]></article-title>
<article-title xml:lang="en"><![CDATA[The Prognostic Nutritional Index predicts poor postoperative outcomes in patients undergoing video-assisted thoracic surgery for an infectious etiology]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rosales-de la Rosa]]></surname>
<given-names><![CDATA[Jesús J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Martínez]]></surname>
<given-names><![CDATA[José B.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Escamilla-López]]></surname>
<given-names><![CDATA[Andrea]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mier-Prado]]></surname>
<given-names><![CDATA[María A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Flores]]></surname>
<given-names><![CDATA[Luis A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Orona]]></surname>
<given-names><![CDATA[Salma C.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Viedas]]></surname>
<given-names><![CDATA[Claudia G.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Huchim-Servin]]></surname>
<given-names><![CDATA[Paulina E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Peña-Gómez-Portugal]]></surname>
<given-names><![CDATA[Emmanuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán Departamento de Cirugía ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2025</year>
</pub-date>
<volume>161</volume>
<numero>2</numero>
<fpage>184</fpage>
<lpage>193</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0016-38132025000200009&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0016-38132025000200009&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0016-38132025000200009&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes: La utilidad del Índice Pronóstico Nutricional (IPN) como herramienta pronóstica en pacientes que requieren cirugía torácica por etiología infecciosa no ha sido explorada.  Objetivo: Evaluar el IPN como predictor de resultados postoperatorios adversos en pacientes con infecciones torácicas que requieren cirugía.  Material y métodos: Análisis retrospectivo de 61 pacientes operados por cirugía toracoscopia asistida por video (VATS) debido a infección torácica, entre 2019 y 2023. Se realizó un análisis con curva de ROC para identificar el punto de corte del IPN que dividiera los pacientes en dos grupos: alto (AR) y bajo (BR) riesgo. Para la comparación entre grupos se utilizaron las pruebas &#967;2, exacta de Fisher y Mann-Whitney. Adicionalmente se realizó un análisis multivariado con regresión de Cox.  Resultados: El punto de corte óptimo fue 28.69, con AUC de 0.860 (p = 0.001), sensibilidad del 88.9% y especificidad del 78.8%. Fueron clasificados como bajo riesgo 42 pacientes y como alto riesgo 19 pacientes. Hubo diferencia en cuanto a mortalidad (AR 42% vs. BR 2%; p &lt; 0.001) y complicaciones mayores (AR 68% vs. BR 16%; p &lt; 0.001) a 30 días. El análisis multivariado demostró que el IPN fue un predictor independiente de mortalidad (p = 0.008) y de complicaciones mayores (p &lt; 0.001).  Conclusiones: El IPN es un predictor válido de resultados postoperatorios adversos en pacientes que son operados con VATS por etiologías infecciosas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background: The Prognostic Nutritional Index (PNI) as a prognostic tool for the postoperative outcomes in patients undergoing thoracic surgery due to an infectious etiology remains unexplored.  Objective: To evaluate the PNI as predictor of poor postoperative outcomes in patients undergoing surgery for a thoracic infection.  Material and methods: A retrospective analysis in patients undergoing video-assisted thoracic surgery (VATS) during January 2019 to December 2023, including 61 patients. We performed a ROC curve analysis to identify the optimal PNI cut-off value to classify the patients into groups: high and low-risk. Chi-square, Fisher exact, and Mann-Whitney tests were used to compare them. A multivariate analysis with Cox regression was also performed.  Results: The optimal PNI cut-off value was 28.69, with AUC 0.860 (p = 0.001), sensitivity 88.9% and specificity 78.8%. 42 patients were low-risk, while 19 high-risk. There was a significant difference in 30-day mortality between groups (HR 42% vs. LR 2%; p &lt; 0.001) as well as in 30-day major complications (HR 68% vs. LR 16%; p &lt; 0.001). A multivariate analysis revealed that PNI-based risk group was an independent predictor of mortality (p = 0.008) and major complications (p &lt; 0.001).  Conclusions: The PNI is a valid predictor of poor postoperative outcomes in patients undergoing VATS for a thoracic infection.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Evaluación nutricional]]></kwd>
<kwd lng="es"><![CDATA[Enfermedades torácicas]]></kwd>
<kwd lng="es"><![CDATA[Cirugía toracoscópica asistida por video]]></kwd>
<kwd lng="es"><![CDATA[Empiema pleural]]></kwd>
<kwd lng="es"><![CDATA[Derrame pleural]]></kwd>
<kwd lng="en"><![CDATA[Nutrition assessment]]></kwd>
<kwd lng="en"><![CDATA[Thoracic diseases]]></kwd>
<kwd lng="en"><![CDATA[Video-assisted thoracic surgery]]></kwd>
<kwd lng="en"><![CDATA[Pleural empyema]]></kwd>
<kwd lng="en"><![CDATA[Pleural effusion]]></kwd>
</kwd-group>
</article-meta>
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