<?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>1665-5044</journal-id>
<journal-title><![CDATA[Revista mexicana de neurociencia]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. neurocienc.]]></abbrev-journal-title>
<issn>1665-5044</issn>
<publisher>
<publisher-name><![CDATA[Academia Mexicana de Neurología A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1665-50442023000100019</article-id>
<article-id pub-id-type="doi">10.24875/rmn.22000059</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Association of anemia with Parkinson&#8217;s disease: a systematic review with meta-analysis of epidemiological studies]]></article-title>
<article-title xml:lang="es"><![CDATA[Asociación de la anemia con la enfermedad de Parkinson: una revisión sistemática con meta-análisis de estudios epidemiológicos]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Meléndez-Flores]]></surname>
<given-names><![CDATA[Jesús D.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Millán-Alanís]]></surname>
<given-names><![CDATA[Juan M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[León-Gutiérrez]]></surname>
<given-names><![CDATA[Humberto de]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rojo-Garza]]></surname>
<given-names><![CDATA[Sandra S.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Álvarez-Villalobos]]></surname>
<given-names><![CDATA[Neri A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Estrada-Bellmann]]></surname>
<given-names><![CDATA[Ingrid]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Nuevo León Faculty of Medicine ]]></institution>
<addr-line><![CDATA[Monterrey ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma de Nuevo León University Hospital &#8220;Dr. José E. González&#8221; &gt;Internal Medicine Department]]></institution>
<addr-line><![CDATA[Monterrey ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma de Nuevo León  ]]></institution>
<addr-line><![CDATA[Monterrey ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Autónoma de Nuevo León University Hospital &#8220;Dr. José E. González&#8221; ]]></institution>
<addr-line><![CDATA[Monterrey ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>02</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>02</month>
<year>2023</year>
</pub-date>
<volume>24</volume>
<numero>1</numero>
<fpage>19</fpage>
<lpage>28</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1665-50442023000100019&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1665-50442023000100019&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1665-50442023000100019&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background: As more risk factors are identified for Parkinson&#8217;s disease (PD), attention has increased toward hematological disorders, as studies have found increased eryptosis, a process characterized by increased erythrocyte apoptosis, in PD patients. We aimed to synthesize scientific evidence assessing the effect of anemia on future PD incidence.  Material and methods: A systematic review was conducted on multiple electronic databases. Any study that assessed the effect or association between presence of anemia and future PD in a longitudinal manner was considered for inclusion.  Results: Five of the 5525 articles met inclusion criteria; three retrospective cohort studies and two case&#8211;control studies. Anemia exposure definition varied among studies. Four of the five studies observed an increased risk for PD; pooled analysis showed a non-significantly increased risk for PD in the cohorts (RR = 1.10; 95% CI = 0.08-15.84) and case&#8211;control studies (RR = 1.44; 95% CI = 0.04-52.47). However, heterogeneity among studies was high (I2 = 97, p &lt; 0.01 and I2 = 85, p &lt; 0.01, respectively).  Conclusion: There are few clinical studies on the association of anemia and PD, despite growing preclinical evidence on their connection. In this review, a tendency toward an increased risk for PD in anemic population was observed, with further research needed to reach a definite conclusion.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes: Reciente ha aumentado la atención hacia los trastornos hematológicos en pacientes con Enfermedad de Parkinson, ya que los estudios han encontrado un aumento de la eriptosis, un proceso caracterizado por un aumento de la apoptosis de los eritrocitos, en estos pacientes. Nuestro objetivo fue sintetizar la evidencia científica que evalúa el efecto de la anemia en la incidencia futura de la EP.  Material y métodos: Se realizó una revisión sistemática en múltiples bases de datos electrónicas. Se consideró para la inclusión cualquier estudio que evaluara la asociación entre la presencia de anemia y la EP futura de forma longitudinal.  Resultados: Cinco de los 5525 artículos cumplieron con los criterios de inclusión; tres estudios de cohortes retrospectivos y dos estudios de casos y controles. La definición de exposición a la anemia varió entre los estudios. Cuatro de los cinco estudios observaron un mayor riesgo de EP. El análisis combinado mostró un aumento no significativo del riesgo de EP en las cohortes (RR = 1.10; IC del 95 % = 0.08-15.84) y estudios de casos y controles (RR = 1.44; IC del 95 % = 0.04-52.47). Sin embargo, la heterogeneidad entre los estudios fue alta (I2 = 97, p &lt; 0.01 e I2 = 85, p &lt; 0.01, respectivamente).  Conclusión: Existen pocos estudios clínicos sobre la asociación de anemia y EP, a pesar de la creciente evidencia preclínica sobre su conexión. En esta revisión, se observó una tendencia hacia un mayor riesgo de EP en la población anémica.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Parkinson disease]]></kwd>
<kwd lng="en"><![CDATA[Anemia]]></kwd>
<kwd lng="en"><![CDATA[Iron]]></kwd>
<kwd lng="en"><![CDATA[Gender]]></kwd>
<kwd lng="en"><![CDATA[Risk factors]]></kwd>
<kwd lng="es"><![CDATA[Enfermedad de Parkinson]]></kwd>
<kwd lng="es"><![CDATA[Anemia]]></kwd>
<kwd lng="es"><![CDATA[Hierro]]></kwd>
<kwd lng="es"><![CDATA[Género]]></kwd>
<kwd lng="es"><![CDATA[Factores de riesgo]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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