<?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>0120-9957</journal-id>
<journal-title><![CDATA[Revista colombiana de Gastroenterología]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. colomb. Gastroenterol.]]></abbrev-journal-title>
<issn>0120-9957</issn>
<publisher>
<publisher-name><![CDATA[Asociación Colombiana de Gastroenterología  ]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-99572021000400455</article-id>
<article-id pub-id-type="doi">10.22516/25007440.712</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[The &#8220;Weekend Effect&#8221; in patients admitted to the Emergency Unit with non-variceal upper gastrointestinal bleeding. A high-complexity hospital experience]]></article-title>
<article-title xml:lang="es"><![CDATA[El &#8220;efecto fin de semana&#8221; en pacientes que asisten a urgencias por hemorragia digestiva superior no varicosa. La experiencia en un hospital de alta complejidad]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mosquera-Klinger]]></surname>
<given-names><![CDATA[Gabriel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Camargo-Trillos]]></surname>
<given-names><![CDATA[Joselyn]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valencia-Maturana]]></surname>
<given-names><![CDATA[Julio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Murillo-Pérez]]></surname>
<given-names><![CDATA[Juliana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ucroz-Benavides]]></surname>
<given-names><![CDATA[Andrea]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Abaunza]]></surname>
<given-names><![CDATA[Juan Esteban]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carvajal-Gutiérrez]]></surname>
<given-names><![CDATA[Jhon Jaime]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Juliao-Baños]]></surname>
<given-names><![CDATA[Fabián]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zuluaga]]></surname>
<given-names><![CDATA[Alejandra]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez-Garri.]]></surname>
<given-names><![CDATA[Héctor]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Hospital Pablo Tobón Uribe  ]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Antioquia  ]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Hospital Pablo Tobón Uribe  ]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<volume>36</volume>
<numero>4</numero>
<fpage>455</fpage>
<lpage>462</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-99572021000400455&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-99572021000400455&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-99572021000400455&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction and Objectives: The &#8220;Weekend Effect&#8221; refers to an increase in mortality of patients admitted to health care centers on weekends or holidays. This study was performed to assess the impact of weekend admissions in patients with upper gastrointestinal bleeding (UGIB) based on a three year-experience in a high-complexity hospital in Latin America.  Materials and Methods:  A descriptive observational study was performed between 2016 and 2018. Data on demographic characteristics, risk factors, symptoms, endoscopic findings, and medical treatment was described. Moreover, the time to perform an endoscopy, the length of hospital stay, and the mortality level among patients admitted on weekends were compared with the same factors during the week.  Results: The analysis included 274 patients admitted during the weekend and holidays (39.1%) versus patients admitted during the week (60.9%). The median age was 68.5 years old (interquartile range [IQR]: 53-79), and 56.6% were men. The most common conditions were tarry stools and hematemesis. Peptic ulcer was the most common endoscopic diagnosis (48.7%). Similar results were found in the length of hospital stay (7,38 ± 8,7 versus 7,38 ± 7,1; p = 0,234) and mortality groups (1,9 % versus 4,2 %; p = 0,274). A higher number of endoscopies 24 hours after the patient was admitted was performed (19,6 % versus 9,6 %; p = 0,041). Conclusions: The &#8220;Weekend Effect&#8221; was not present in the analyzed group, and there are no significant differences related to the length of hospital stay or the mortality of patients diagnosed with UGIB.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción y objetivos: el &#8220;efecto fin de semana&#8221; se define como un incremento en la mortalidad en pacientes que ingresan a centros asistenciales durante el fin de semana o días festivos. Este estudio se realizó para evaluar el posible &#8220;efecto fin de semana&#8221; en pacientes con hemorragia digestiva superior (HDS) con base en una experiencia de 3 años en un hospital de alta complejidad en Latinoamérica.  Materiales y métodos:  estudio observacional descriptivo realizado entre 2016 y 2018. Se describieron las características demográficas, factores de riesgo, síntomas de ingreso, hallazgos endoscópicos y diferentes intervenciones médicas. Además, se compararon los tiempos de realización de endoscopia, estancia hospitalaria y mortalidad entre los pacientes admitidos durante el fin de semana frente a días entre semana.  Resultados:  el análisis incluyó 274 pacientes en fines de semana y festivos (39,1 %) frente a pacientes en días entre semana (60,9 %). La mediana de edad fue de 68,5 años (rango intercuartílico [RIC]: 53-79), el 56,6 % fueron hombres. Las manifestaciones más comunes fueron melenas y hematemesis. La úlcera péptica fue el diagnóstico endoscópico más común (48,7 %). Los tiempos de estancia hospitalaria (7,38 ± 8,7 frente a 7,38 ± 7,1; p = 0,234) y mortalidad (1,9 % frente a 4,2 %; p = 0,274) fueron similares en ambos grupos. Se realizó una mayor cantidad de endoscopias después de las 24 horas en pacientes ingresados el fin de semana (19,6 % frente a 9,6 %; p = 0,041).  Conclusiones:  en esta cohorte no se presentó el &#8220;efecto fin de semana&#8221;, no se observan diferencias en relación con la estancia hospitalaria, ni con la mortalidad en pacientes ingresados por HDS.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Gastrointestinal bleeding]]></kwd>
<kwd lng="en"><![CDATA[Endoscopy]]></kwd>
<kwd lng="en"><![CDATA[Mortality]]></kwd>
<kwd lng="en"><![CDATA[&#8220;Weekend Effect&#8221;]]></kwd>
<kwd lng="es"><![CDATA[Hemorragia gastrointestinal]]></kwd>
<kwd lng="es"><![CDATA[endoscopia]]></kwd>
<kwd lng="es"><![CDATA[mortalidad]]></kwd>
<kwd lng="es"><![CDATA[&#8220;efecto fin de semana&#8221;]]></kwd>
</kwd-group>
</article-meta>
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