<?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>0864-2176</journal-id>
<journal-title><![CDATA[Revista Cubana de Oftalmología]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Cubana Oftalmol]]></abbrev-journal-title>
<issn>0864-2176</issn>
<publisher>
<publisher-name><![CDATA[Editorial Ciencias Médicas]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0864-21762020000300005</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Factores de riesgo asociados a oclusiones venosas retinianas]]></article-title>
<article-title xml:lang="en"><![CDATA[Risk factors associated to retinal vein occlusion]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chiang Rodríguez]]></surname>
<given-names><![CDATA[Caridad]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zhang]]></surname>
<given-names><![CDATA[Huiwen]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lapido Polanco]]></surname>
<given-names><![CDATA[Suzel Ivón]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Toledo González]]></surname>
<given-names><![CDATA[Yusimik]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chirino Chiang]]></surname>
<given-names><![CDATA[Armando Ángel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Cubano de Oftalmología &#8220;Ramón Pando Ferrer&#8221;  ]]></institution>
<addr-line><![CDATA[La Habana ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Policlínico Docente "Eduardo Díaz Ortega"  ]]></institution>
<addr-line><![CDATA[La Habana ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Ciencias Médicas de La Habana Facultad &#8220;Finlay Albarrán&#8221; ]]></institution>
<addr-line><![CDATA[La Habana ]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2020</year>
</pub-date>
<volume>33</volume>
<numero>3</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S0864-21762020000300005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S0864-21762020000300005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S0864-21762020000300005&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Objetivos:  Identificar los factores epidemiológicos, sistémicos y oculares de las oclusiones venosas retinianas.  Métodos:  Se realizó un estudio observacional descriptivo, transversal y prospectivo de los casos nuevos de oclusiones venosas retinianas que acudieron al Cuerpo de Guardia del Instituto Cubano de Oftalmología "Ramón Pando Ferrer", durante el período de marzo del año 2017 a marzo de 2018. Se estudiaron las variables epidemiológicas, los antecedentes patológicos sistémicos y los oculares. Los resultados se expresaron en frecuencias absolutas y relativas (variables cualitativas) y se calculó la media y la desviación estándar en las cuantitativas.  Resultados:  En el período se estudiaron 50 ojos de 50 pacientes diagnosticados con oclusión venosa retiniana. La edad promedio fue de 66 años (9,5 desviación estándar). Prevaleció la raza blanca (44 %), sin predilección por sexo. Fueron más frecuentes la oclusión de la vena central de la retina (60 %) y las formas no isquémicas de daño vascular (78 %), así como la hipertensión arterial (78 %), la obesidad (36 %) y la diabetes mellitus (34 %) como factores de riesgo sistémicos asociados, y el glaucoma crónico (24 %) como factor ocular.  Conclusiones:  Las oclusiones venosas retinianas se presentan en edades avanzadas y asociadas a factores de riesgo sistémicos y oculares.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Objectives:  Identify the epidemiological, systemic and ocular factors associated to retinal vein occlusion.  Methods:  A descriptive cross-sectional observational prospective study was conducted of the new cases of retinal vein occlusion presenting at the Emergency Service of Ramón Pando Ferrer Cuban Institute of Ophthalmology from March 2017 to March 2018. Analysis was performed of epidemiological variables and systemic and ocular pathological antecedents. Results were expressed as absolute and relative frequencies (qualitative variables), whereas quantitative variables underwent mean and standard deviation estimation.  Results:  Fifty eyes of 50 patients diagnosed with retinal vein occlusion were studied in the period. Mean age was 66 years (9.5 standard deviation). White skin color prevailed (44%) with no sex predominance. The most common disorders were central vein retinal occlusion (60%) and non-ischemic forms of vascular damage (78%), as well as arterial hypertension (78%), obesity (36%) and diabetes mellitus (34%) as associated systemic risk factors, and chronic glaucoma (24%) as an ocular factor.  Conclusions:  Retinal vein occlusion presents at advanced ages and is associated to systemic and ocular risk factors.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Oclusión venosa retiniana]]></kwd>
<kwd lng="es"><![CDATA[factores de riesgo sistémicos]]></kwd>
<kwd lng="es"><![CDATA[factores de riesgo oculares]]></kwd>
<kwd lng="es"><![CDATA[caracterización epidemiológica]]></kwd>
<kwd lng="en"><![CDATA[Retinal vein occlusion]]></kwd>
<kwd lng="en"><![CDATA[systemic risk factors]]></kwd>
<kwd lng="en"><![CDATA[ocular risk factors]]></kwd>
<kwd lng="en"><![CDATA[epidemiological characterization]]></kwd>
</kwd-group>
</article-meta>
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