<?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>2007-7459</journal-id>
<journal-title><![CDATA[Horizonte sanitario]]></journal-title>
<abbrev-journal-title><![CDATA[Horiz. sanitario]]></abbrev-journal-title>
<issn>2007-7459</issn>
<publisher>
<publisher-name><![CDATA[Universidad Juárez Autónoma de Tabasco, División Académica de Ciencias de la Salud]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-74592022000100017</article-id>
<article-id pub-id-type="doi">10.19136/hs.a21n1.4516</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Association of ABO blood type with mortality in hospitalized patients with COVID-19]]></article-title>
<article-title xml:lang="es"><![CDATA[Asociación de los grupos sanguíneos ABO con la mortalidad en pacientes hospitalizados por COVID-19]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vázquez-Medina]]></surname>
<given-names><![CDATA[Martín Uriel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cerda-Reyes]]></surname>
<given-names><![CDATA[Eira]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barrón-Campos]]></surname>
<given-names><![CDATA[Arcelia Carolina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Almeyda-Farfán]]></surname>
<given-names><![CDATA[José Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ocharan-Hernández]]></surname>
<given-names><![CDATA[María Esther]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vargas-De-León]]></surname>
<given-names><![CDATA[Cruz]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Superior de Medicina ]]></institution>
<addr-line><![CDATA[ Ciudad de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Secretaria de la Defensa Nacional Hospital Central Militar Departamento de Investigación]]></institution>
<addr-line><![CDATA[ Ciudad de México]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Secretaria de la Defensa Nacional Hospital Central Militar Departamento de Investigación]]></institution>
<addr-line><![CDATA[ Ciudad de México]]></addr-line>
<country>México</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Superior de Medicina ]]></institution>
<addr-line><![CDATA[ Ciudad de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Secretaria de la Defensa Nacional  ]]></institution>
<addr-line><![CDATA[ Ciudad de México]]></addr-line>
<country>México</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Superior de Medicina ]]></institution>
<addr-line><![CDATA[ Ciudad de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2022</year>
</pub-date>
<volume>21</volume>
<numero>1</numero>
<fpage>17</fpage>
<lpage>24</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-74592022000100017&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-74592022000100017&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-74592022000100017&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Objective:  To explore the relation between ABO blood group system and in-hospital mortality in Mexican patients admitted with COVID-19.  Materials and methods:  We performed a retrospective study with 2,369 hospitalized patients with confirmed SARS-CoV-2 infection in a tertiary referral hospital, admitted between March 27 and December 10, 2020. Data were obtained from electronic health records. Adjusted and unadjusted Cox Proportional-Hazard models were performed to test the association of ABO blood groups with mortality of COVID-19 patients. The variables considered for adjustment of the models were age, sex, and main comorbidities.  Results:  Out of all studied patients, group O was the most frequent blood type with 1999 patients (84.3%), followed by group A (11.3%), B (3.5%) and AB (0.72%). Blood group A was associated with a lower hazard of death among COVID-19 patients compared with group O (adjusted HR = 0.72, 95% IC 0.55-0.95, P = 0.02. Groups B, AB and Positive Rh were not significantly associated with the outcome.  Conclusions:  We found evidence of a statistically significant association between ABO blood type and COVID-19 in-hospital death. Patients with blood group A may be less likely to die during hospitalization compared with group O.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Objetivo:  Explorar la relación entre los grupos sanguíneos del sistema ABO y la mortalidad hospitalaria en pacientes mexicanos ingresados por COVID-19.  Materiales y métodos:  Se realizó un estudio retrospectivo con 2,369 pacientes hospitalizados con infección confirmada por SARS-CoV-2 en un hospital de tercer nivel, ingresados del 27 de marzo al 10 de diciembre del 2020, los datos fueron obtenidos del expediente clínico digital del hospital. Se realizaron modelos de Riesgos-Proporcionales de Cox ajustados y no ajustados para evaluar la asociación de los grupos sanguíneos ABO con la mortalidad hospitalaria de los pacientes COVID-19. Las variables consideradas en el modelo ajustado fueron edad, sexo y principales comorbilidades.  Resultados:  De todos los pacientes estudiados, el grupo O fue el más frecuente con 1999 pacientes (84.3%), seguido por el grupo A (11.3%), B (3.5%) y AB (0.72%). El grupo sanguíneo A se asoció a menor riesgo de muerte entre pacientes con COVID-19 comparado con el grupo O (HR ajustado = 0.72, IC 95% 0.55-0.95, valor de P = 0.02). Los grupos B, AB y Rh positivo no se asociaron significativamente con el desenlace. Conclusiones: Encontramos evidencia de una asociación estadísticamente significativa entre los grupos sanguíneos ABO y la muerte por COVID-19 en pacientes hospitalizados. El grupo A podría ser menos susceptible a morir durante la hospitalización respecto al grupo O.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[COVID-19]]></kwd>
<kwd lng="en"><![CDATA[Blood Group Antigens]]></kwd>
<kwd lng="en"><![CDATA[Mortality]]></kwd>
<kwd lng="en"><![CDATA[Prognosis.]]></kwd>
<kwd lng="es"><![CDATA[COVID-19]]></kwd>
<kwd lng="es"><![CDATA[Antígenos de Grupos Sanguíneos]]></kwd>
<kwd lng="es"><![CDATA[Mortalidad]]></kwd>
<kwd lng="es"><![CDATA[Pronóstico]]></kwd>
</kwd-group>
</article-meta>
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