<?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>S0016-38132023000200106</article-id>
<article-id pub-id-type="doi">10.24875/gmm.m22000750</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Nuevo sistema de calificación diagnóstica para apendicitis pediátrica basado en parámetros hematológicos ajustados por edad y sexo]]></article-title>
<article-title xml:lang="en"><![CDATA[A novel diagnostic scoring system for pediatric appendicitis based on age and sex-adjusted hematological parameters]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aydo&#287;du]]></surname>
<given-names><![CDATA[Bahattin]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Azizo&#287;lu]]></surname>
<given-names><![CDATA[Mustafa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arslan]]></surname>
<given-names><![CDATA[Serkan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aydo&#287;du]]></surname>
<given-names><![CDATA[Gülay]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Basuguy]]></surname>
<given-names><![CDATA[Erol]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sal&#305;k]]></surname>
<given-names><![CDATA[Fikret]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ökten]]></surname>
<given-names><![CDATA[Mustafa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hanifi-Okur]]></surname>
<given-names><![CDATA[Mehmet]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Dicle Facultad de Medicina Departamento de Cirugía Pediátrica]]></institution>
<addr-line><![CDATA[Diyarbak&#305;r ]]></addr-line>
<country>Turquía</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Dicle Facultad de Medicina Departamento de Patología]]></institution>
<addr-line><![CDATA[Diyarbak&#305;r ]]></addr-line>
<country>Turquía</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Dicle Facultad de Medicina Departamento de Anestesiología]]></institution>
<addr-line><![CDATA[Diyarbak&#305;r ]]></addr-line>
<country>Turquía</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2023</year>
</pub-date>
<volume>159</volume>
<numero>2</numero>
<fpage>106</fpage>
<lpage>112</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0016-38132023000200106&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0016-38132023000200106&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0016-38132023000200106&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes: El diagnóstico de apendicitis aguda representa un reto en pacientes pediátricos.  Objetivo: Establecer la importancia del índice neutrófilos-linfocitos (INL), índice plaquetas-linfocitos (IPL) y otros parámetros hematológicos ajustados por edad y sexo en la predicción de apendicitis aguda, así como describir un nuevo sistema de calificación.  Material y métodos: Se analizaron retrospectivamente expedientes clínicos de 946 niños hospitalizados por apendicitis aguda. Se desarrolló un sistema de calificación basado en INL, IPL, ILM y proteína C reactiva (PCR) ajustados por edad y sexo.  Resultados: Los pacientes se dividieron en grupo I de exploración negativa y grupo II de apendicitis aguda; las medias de edad correspondientes fueron 12.20 ± 2.31 y 11.56 ± 3.11. El recuento leucocitario, porcentaje de neutrófilos, INL, IPL, ILM y PCR fueron superiores en el grupo II. La calificación osciló entre 0 y 8 puntos; se determinó que 4.5 fue el mejor punto de corte para apendicitis aguda con mayor área bajo la curva (0.96), sensibilidad (94 %), especificidad (86 %), valor predictivo positivo (97.5 %), valor predictivo negativo (65 %), precisión (92.6 %) y tasa de clasificación errónea (7.4 %).  Conclusión: El sistema de calificación que se propone, calculado por edad y sexo de los pacientes, se puede utilizar para evitar cirugías innecesarias.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background: Acute appendicitis diagnosis can sometimes be a real challenge in pediatric patients.  Objective: To establish the importance of neutrophil/lymphocyte ratio (NLR), platelet/lymphocyte ratio (PLR), and other hematological parameters adjusted for age and sex in the prediction of acute appendicitis, as well as to describe a new scoring system.  Material and methods: Medical records of 946 children hospitalized for acute appendicitis were retrospectively analyzed. A scoring system based on NLR, PLR, lymphocyte/monocyte ratio (LMR), and C-reactive protein (CRP) adjusted for age and sex was developed.  Results: Patients were divided into group I, with negative examination, and group II, with acute appendicitis; mean ages were 12.20 ± 2.31 and 11.56 ± 3.11, respectively. Leukocyte count, neutrophil percentage, NLR, PLR, LMR and PCR were higher in group II. The scores ranged from 0 to 8 points; 4.5 was determined to be the best cut-off point for acute appendicitis with the highest area under the curve (0.96), sensitivity (94%), specificity (86%), positive predictive value (97.5%), negative predictive value (65%), accuracy (92.6%) and misclassification rate (7.4%).  Conclusion: The proposed scoring system, calculated based on patient age and gender, can be used for unnecessary surgeries to be avoided.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Apendicitis pediátrica]]></kwd>
<kwd lng="es"><![CDATA[Índice neutrófilos-linfocitos ajustado]]></kwd>
<kwd lng="es"><![CDATA[Sistema de calificación novedoso]]></kwd>
<kwd lng="en"><![CDATA[Pediatric appendicitis]]></kwd>
<kwd lng="en"><![CDATA[Adjusted neutrophil-lymphocyte ratio]]></kwd>
<kwd lng="en"><![CDATA[Novel scoring system]]></kwd>
</kwd-group>
</article-meta>
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