<?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>2312-3893</journal-id>
<journal-title><![CDATA[Revista Virtual de la Sociedad Paraguaya de Medicina Interna]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. virtual Soc. Parag. Med. Int.]]></abbrev-journal-title>
<issn>2312-3893</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Paraguaya de Medicina Interna]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2312-38932015000200003</article-id>
<article-id pub-id-type="doi">10.18004/rvspmi/2312-3893/2015.02(02)23-032</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Relación entre la diabetes mellitus y la mortalidad de la neumonía adquirida en la comunidad]]></article-title>
<article-title xml:lang="en"><![CDATA[Relation between diabetes mellitus and mortality of community acquired pneumonia]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cardozo Jiménez]]></surname>
<given-names><![CDATA[Deisy Gabriela]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Nacional de Itapúa Hospital Nacional ]]></institution>
<addr-line><![CDATA[Itauguá ]]></addr-line>
<country>Paraguay</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2015</year>
</pub-date>
<volume>2</volume>
<numero>2</numero>
<fpage>23</fpage>
<lpage>32</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_arttext&amp;pid=S2312-38932015000200003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_abstract&amp;pid=S2312-38932015000200003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_pdf&amp;pid=S2312-38932015000200003&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Introducción: la neumonía adquirida en la comunidad (NAC) se asocia con una morbilidad y mortalidad considerables. La infección pulmonar lo hace por sí misma pero también por su asociación con la diabetes mellitus (DM), la que representa un papel importante en esos resultados. Objetivos: determinar la influencia de la DM en el desenlace de la NAC. Materiales y método: estudio de cohortes retrospectiva. Cohorte 1: varones y mujeres mayores de 16 años con DM y NAC ingresados al Hospital Nacional en los años 2013-2014. Cohorte 2: varones y mujeres mayores de 16 años portadores de NAC, sin DM, ingresados al Hospital Nacional en el mismo periodo. Resultados: se incluyeron 32 sujetos en la cohorte 1 y 104 en la cohorte 2. Fallecieron 11 pacientes, de los cuales 3 (9%) corresponden a la cohorte 1 y 8 (7%) a cohorte 2 (RR 0,97 IC 95% 0,8-1,1 p 0,6). Se observó mayor estadía hospitalaria en pacientes con hiperglicemia al ingreso. Se encontró un Curb65 medio de 1,1± 0,9 en altas vivos y 2,2± 0,7 en pacientes que obitaron (p 0,0004). Conclusión: la DM no se asoció significativamente con mayor mortalidad ni mayor estancia hospitalaria en pacientes con NAC.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Introduction: Community acquired pneumonia (CAP) is associated with considerable morbidity and mortality. The pulmonary infection does by itself but also by its association with diabetes mellitus (DM), which plays an important role in those results. Objectives: To determine the influence of DM in the outcome of CAP. Materials and method: Retrospective cohort study. Cohort 1: men and women older than 16 years old with DM and CAP admitted into the National Hospital in 2013 and 2014. Cohort 2: men and women older than 16 years old and carriers of CAP, without DM, admitted into the National Hospital in the same period. Results: Thirty two subjects were included in cohort 1 and 104 in cohort 2. Eleven patients died, 3 (9%) of them from cohort 1 and 8 (7%) from cohort 2 (RR 0.97, CI 95%, 0.8-1.1, p = 0.6). There was longer hospital stay in patients with higher glycemia at admittance. There was a mean Curb65 of 1.1± 0.9 in live discharges and 2.2± 0.7 in patients who died (p= 0.0004). Conclusion: DM was not significantly associated with either higher mortality or longer hospital stay in CAP patients.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[diabetes mellitus]]></kwd>
<kwd lng="es"><![CDATA[neumonía aguda de la comunidad]]></kwd>
<kwd lng="es"><![CDATA[mortalidad]]></kwd>
<kwd lng="en"><![CDATA[diabetes mellitus]]></kwd>
<kwd lng="en"><![CDATA[community acute pneumonia]]></kwd>
<kwd lng="en"><![CDATA[mortality]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="right"><span lang="EN-US"> </span><font size="2" face="Verdana, Geneva, sans-serif"><b>ART&Iacute;CULO ORIGINAL</b></font></p>     <p>&nbsp;</p>     <p><font size="4" face="Verdana, Geneva, sans-serif"><b>Relaci&oacute;n entre la diabetes mellitus y la  mortalidad de la neumon&iacute;a adquirida en la comunidad</b></font></p>     <p><font size="3" face="Verdana, Geneva, sans-serif"><b>Relation  between diabetes mellitus and mortality of community acquired pneumonia </b></font></p>      <p><font size="2" face="Verdana, Geneva, sans-serif"><b>Autor</b>: Deisy Gabriela Cardozo Jim&eacute;nez<sup><a href="#corresp">1</a></sup></font><a name="autor"></a></p>     <p>&nbsp;</p> <hr size "1" noshade>     <p><font size="3" face="Verdana, Geneva, sans-serif"><b>Resumen</b></font></p>      <p><font size="2" face="Verdana, Geneva, sans-serif"><b>Introducci&oacute;n:</b> la neumon&iacute;a adquirida en  la comunidad (NAC) se asocia con una morbilidad y mortalidad considerables. La  infecci&oacute;n pulmonar lo hace por s&iacute; misma pero tambi&eacute;n por su asociaci&oacute;n con la  diabetes mellitus (DM), la que representa un papel importante en esos resultados. <b>Objetivos</b>: determinar la influencia  de la DM en el desenlace de la NAC. <b>Materiales  y m&eacute;todo:</b> estudio de cohortes retrospectiva. Cohorte 1:  varones y mujeres mayores de 16 a&ntilde;os con DM y NAC ingresados al Hospital Nacional  en los a&ntilde;os 2013-2014. Cohorte 2: varones y mujeres mayores de 16 a&ntilde;os  portadores de NAC, sin DM, ingresados al Hospital Nacional en el mismo periodo. <b>Resultados:</b> se incluyeron 32 sujetos  en la cohorte 1 y 104 en la cohorte 2. Fallecieron 11 pacientes, de los cuales 3 (9%) corresponden  a la cohorte 1 y 8 (7%) a cohorte 2 (RR 0,97 IC 95% 0,8-1,1 p 0,6). Se observ&oacute;  mayor estad&iacute;a hospitalaria en pacientes con hiperglicemia al ingreso. Se  encontr&oacute; un Curb65 medio de 1,1&plusmn;0,9 en altas vivos y 2,2&plusmn;0,7 en pacientes que  obitaron (p 0,0004). <b>Conclusi&oacute;n:</b> la DM no se asoci&oacute;  significativamente con mayor mortalidad ni mayor estancia hospitalaria en  pacientes con NAC.</font></p>     <p><font size="2" face="Verdana, Geneva, sans-serif"><b>Palabras clave</b>: diabetes mellitus, neumon&iacute;a aguda de la  comunidad, mortalidad</font></p><hr size "1" noshade>     <p><font size="3" face="Verdana, Geneva, sans-serif"><b>Abstract</b></font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana, Geneva, sans-serif"><b>Introduction:</b> Community  acquired pneumonia (CAP) is associated with considerable morbidity and  mortality. The pulmonary infection does by itself but also by its association  with diabetes mellitus (DM), which plays an important role in those results. <b>Objectives</b>: To determine the influence  of DM in the outcome of CAP. <b>Materials  and method:</b> Retrospective cohort study. Cohort 1: men and women older than 16 years old with DM and CAP admitted  into the National Hospital in 2013 and 2014. Cohort 2: men and women older than  16 years old and carriers of CAP, without DM, admitted into the National  Hospital in the same period. <b>Results:</b> Thirty two subjects were included in cohort 1 and 104 in cohort 2. Eleven  patients died, 3 (9%) of them from cohort 1 and 8 (7%) from cohort 2 (RR 0.97,  CI 95%, 0.8-1.1, p = 0.6). There was longer hospital stay in patients with  higher glycemia at admittance. There was a mean Curb65 of  1.1&plusmn;0.9 in live discharges and 2.2&plusmn;0.7 in patients who died (p= 0.0004). <b>Conclusion:</b> DM was not  significantly associated with either higher mortality or longer hospital stay  in CAP patients.</font></p>     <p><font size="2" face="Verdana, Geneva, sans-serif"><b>Keywords</b>: diabetes mellitus, community acute pneumonia, mortality</font></p> <hr size "1" noshade>      <p>&nbsp;</p>     <p><font size="3" face="Verdana, Geneva, sans-serif"><b>Introducci&oacute;n</b></font></p>      <p><font size="2" face="Verdana, Geneva, sans-serif">La neumon&iacute;a adquirida en la comunidad (NAC), una de las  infecciones m&aacute;s comunes en los pa&iacute;ses econ&oacute;micamente desarrollados, se asocia  con una morbilidad y mortalidad considerables. La infecci&oacute;n pulmonar lo hace  por s&iacute; misma pero tambi&eacute;n por su asociaci&oacute;n con una respuesta inflamatoria  sist&eacute;mica, la que representa un papel importante en esos resultados<sup>1</sup>.  Puede ser causada por diferentes agentes infecciosos. Se caracteriza  cl&iacute;nicamente por signos y s&iacute;ntomas de infecci&oacute;n respiratoria baja: tos, fiebre  y signos de consolidaci&oacute;n al examen f&iacute;sico. Se asocia a un infiltrado nuevo en  la radiograf&iacute;a de t&oacute;rax y se presenta en pacientes no hospitalizados durante  los 14 d&iacute;as previos a su aparici&oacute;n<sup>1</sup>. Existe una variaci&oacute;n  estacional, con mayor n&uacute;mero de casos de NAC durante los meses de invierno. La  frecuencia de NAC es mayor en hombres y las tasas de NAC son m&aacute;s altas en los  extremos de la vida<sup>2</sup>.    <br> </font><font size="2" face="Verdana, Geneva, sans-serif">    <br> Los pulmones est&aacute;n constantemente expuestos a material  particulado y a los microorganismos que est&aacute;n presentes en las v&iacute;as  respiratorias superiores y que, por microaspiraci&oacute;n, entran en el tracto  respiratorio inferior. En general, las v&iacute;as respiratorias inferiores permanecen  est&eacute;riles debido a los mecanismos de defensa pulmonar. El desarrollo de la NAC  indica un defecto en las defensas del hu&eacute;sped, la exposici&oacute;n a un  microorganismo particularmente virulento o a un inoculo<sup>3-5</sup>. Diversos  agentes infecciosos -virus, bacterias y hongos- causan NAC. El <i>Streptococcus pneumoniae</i> es la causa m&aacute;s  com&uacute;n de NAC, seguido de <i>Haemophilus  influenzae</i>, <i>Staphylococcus aureus</i> y g&eacute;rmenes at&iacute;picos<sup>6</sup>.</font></p>      <p><font size="2" face="Verdana, Geneva, sans-serif">La presentaci&oacute;n cl&aacute;sica incluye fiebre de inicio agudo  con escalofr&iacute;os, tos y taquipnea. Entre los signos y s&iacute;ntomas respiratorios se  destacan la disnea con taquipnea, los quejidos, el aleteo nasal y las  retracciones de la musculatura intercostal y abdominal<sup>7</sup>. Se distinguen tres  tipos de neumon&iacute;as seg&uacute;n sus caracter&iacute;sticas morfol&oacute;gicas en la radiograf&iacute;a: neumon&iacute;as  alveolares, bronconeumon&iacute;as, neumon&iacute;as intersticiales<sup>7</sup>. Seg&uacute;n las  caracter&iacute;sticas morfol&oacute;gicas, las neumon&iacute;as pueden producir diferentes s&iacute;ntomas  y signos en el examen f&iacute;sico y radiol&oacute;gico. Muchos estudios han demostrado que  el examen f&iacute;sico y radiograf&iacute;a de t&oacute;rax no permiten identificar con seguridad  el agente etiol&oacute;gico de la infecci&oacute;n pulmonar, ya que existe mucha  superposici&oacute;n entre las manifestaciones cl&iacute;nicas y radiogr&aacute;ficas determinadas  por los distintos g&eacute;rmenes<sup>8-15</sup>.</font></p>      <p><font size="2" face="Verdana, Geneva, sans-serif">La sensibilidad  del examen f&iacute;sico pulmonar en las neumon&iacute;as es limitada, ya que hasta en un 50%  de los casos las manifestaciones cl&iacute;nicas son incompletas o est&aacute;n ausentes. Por  lo tanto, son los signos generales, como fiebre, compromiso del estado general  y aumento de la frecuencia respiratoria, junto a la anamnesis y a la b&uacute;squeda  sistem&aacute;tica del origen respiratorio en los cuadros infecciosos, los que  permiten plantear la neumon&iacute;a como hip&oacute;tesis diagn&oacute;stica para ser confirmada  con un examen radiogr&aacute;fico<sup>16</sup>. No se necesitan pruebas para  determinar el agente etiol&oacute;gico en NAC. Se justifican cuando sus resultados  ayudan en las decisiones terap&eacute;uticas respecto de pacientes graves que  necesitan hospitalizaci&oacute;n y debe elegirse correctamente el antibi&oacute;tico. Los  an&aacute;lisis tambi&eacute;n deben realizarse en sujetos con factores de riesgo<sup>17</sup>.</font></p>      <p><font size="2" face="Verdana, Geneva, sans-serif">El inicio oportuno y adecuado del tratamiento antibi&oacute;tico  debe conducir a una evoluci&oacute;n favorable en la mayor&iacute;a de los casos dentro de  las primeras 48 hs de iniciado el tratamiento. Si esto no ocurre se deben  descartar complicaciones de tipo supurativas a nivel del par&eacute;nquima pulmonar,  del espacio pleural o tambi&eacute;n peric&aacute;rdicas y que incluyen: neumon&iacute;a  necrotizante, absceso de pulm&oacute;n, neumatocele, gangrena pulmonar, derrame  pleural y pericarditis purulenta. Cualquiera de ellas puede generar fiebre  prolongada, mayor duraci&oacute;n del tratamiento con antibi&oacute;ticos, de la  hospitalizaci&oacute;n y tratamiento quir&uacute;rgico en el caso de empiema tabicado<sup>18</sup>.  Adem&aacute;s pueden presentarse complicaciones extrapulmonares asociadas, como el  s&iacute;ndrome de respuesta inflamatoria sist&eacute;mica (SIRS) y el shock s&eacute;ptico que  requieren manejo y monitorizaci&oacute;n en cuidados intensivos<sup>18</sup>.</font></p>      ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana, Geneva, sans-serif">Los factores de riesgo asociados con la mortalidad de la  NAC son m&uacute;ltiples y han sido identificados en diversos estudios, los cuales  incluyen la edad, gravedad, enfermedad pulmonar obstructiva cr&oacute;nica (EPOC),  insuficiencia renal cr&oacute;nica, insuficiencia cardiaca cr&oacute;nica, diabetes mellitus,  alcoholismo, inmunodepresi&oacute;n, enfermedad neopl&aacute;sica, enfermedad neurol&oacute;gica y  enfermedad cr&oacute;nica del h&iacute;gado<sup>19,20</sup>. En pacientes que no tienen  comorbilidad estos factores de riesgo incluyen signos de progresi&oacute;n; en la  enfermedad pulmonar multilobar, la necesidad de ventilaci&oacute;n mec&aacute;nica y el uso  de vasopresores<sup>21-30</sup>.</font></p>      <p><font size="2" face="Verdana, Geneva, sans-serif"><b>Consecuencias  cl&iacute;nicas y evolutivas de la hiperglucemia en el paciente cr&iacute;ticamente enfermo.</b></font></p>     <p><font size="2" face="Verdana, Geneva, sans-serif">La DM es un grupo de alteraciones metab&oacute;licas que se  caracteriza por hiperglucemia cr&oacute;nica, debida a un defecto en la secreci&oacute;n de  la insulina, a un defecto en la acci&oacute;n de la misma, o a ambas. Adem&aacute;s de la  hiperglucemia, coexisten alteraciones en el metabolismo de las grasas y de las  prote&iacute;nas<sup>31</sup>. La hiperglucemia sostenida en el tiempo se asocia con  da&ntilde;o, disfunci&oacute;n y falla de varios &oacute;rganos y sistemas, especialmente ri&ntilde;ones,  ojos, nervios, coraz&oacute;n y vasos sangu&iacute;neos<sup>32-37</sup>.</font></p>      <p><font size="2" face="Verdana, Geneva, sans-serif">Los niveles plasm&aacute;ticos de glucemia y la presencia de  la resistencia a la insulina se integran en la clasificaci&oacute;n de la intensidad  de la agresi&oacute;n por niveles de estr&eacute;s junto con las p&eacute;rdidas nitrogenadas, el  nivel de &aacute;cido l&aacute;ctico, el consumo de ox&iacute;geno y la excreta urinaria de 3-metil  histidina<sup>38</sup>. La hiperglucemia y la intolerancia a la glucosa son  caracter&iacute;sticas del s&iacute;ndrome inflamatorio postagresi&oacute;n. Su presencia est&aacute;  relacionada con la intensidad de la agresi&oacute;n y con la morbimortalidad, por lo  que es un buen marcador pron&oacute;stico. Entre sus principales consecuencias  cl&iacute;nicas destacan:</font>    <br> <ul type="disc">   <font size="2" face="Verdana, Geneva, sans-serif">       <li> Hiperglucemia, glucosuria.     <li> Aumento de &aacute;cidos grasos libres y glicerol.     <li> Catabolismo, empleo de amino&aacute;cidos neoglucog&eacute;nicos, disminuci&oacute;n de las  inmunoglobulinas.     <li> Alteraci&oacute;n de la inmunidad.     <li> Extensi&oacute;n de la lesi&oacute;n neural postisquemia.     ]]></body>
<body><![CDATA[<li> Neuropat&iacute;a perif&eacute;rica.     <li>Aumento de la morbimortalidad. </li></font></p>     </ul>      <p><font size="2" face="Verdana, Geneva, sans-serif">Especial inter&eacute;s, por sus implicaciones pron&oacute;sticas,  tiene la afectaci&oacute;n del sistema inmune, pues se sabe que la hiperglucemia lo  afecta a todos los niveles: adherencia, quimiotaxis, fagocitosis, estr&eacute;s  oxidativo, actividad microbicida, glicosilaci&oacute;n de las inmunoglobulinas y  complemento<sup>38</sup>. Estudios recientes indican que la DM o las  alteraciones de la glucemia se asocian con una prolongaci&oacute;n de la estancia  hospitalaria o una mortalidad aumentada por infecciones, incluyendo la NAC<sup>38</sup>.  Dada la estrecha asociaci&oacute;n entre la DM y la enfermedad cardiovascular, &eacute;sta  contribuye a la mortalidad global por NAC. La hiperglucemia en la admisi&oacute;n y la  DM preexistente se asocian con la mortalidad de los pacientes hospitalizados  por NAC. Cualquier enfermedad que aumente la susceptibilidad a la infecci&oacute;n y  predisponga a una enfermedad grave puede afectar la evoluci&oacute;n. La DM est&aacute;  relacionada con una alteraci&oacute;n inmunol&oacute;gica y es considerada un factor  predisponente de una amplia variedad de enfermedades infecciosas, incluyendo la  neumon&iacute;a. Casi el 25% de los pacientes con NAC tiene DM<sup>38</sup>.</font></p>      <p><font size="2" face="Verdana, Geneva, sans-serif">Existen muchas afecciones asociadas a la DM que hacen que  esta enfermedad se asocie con la NAC, como el mayor riesgo de aspiraci&oacute;n, la  depresi&oacute;n inmunol&oacute;gica, el deterioro de la funci&oacute;n pulmonar y la  microangiopat&iacute;a pulmonar<sup>38</sup>. Podr&iacute;a ser que la hiperglucemia cr&oacute;nica  por s&iacute; misma influya sobre diversas funciones de defensa del hu&eacute;sped, como la  quimiotaxis, la fagocitosis y la actividad bactericida de los histiocitos. Sin  embargo, se ha demostrado que el tratamiento insul&iacute;nico intensivo para corregir  el estado metab&oacute;lico en los pacientes hospitalizados no tiene un efecto  evidente sobre las infecciones o la mortalidad<sup>39</sup>.</font></p>      <p><font size="2" face="Verdana, Geneva, sans-serif">Entre los diab&eacute;ticos, las infecciones m&aacute;s  comunes son las de v&iacute;as respiratorias bajas, urinarias y de piel<sup>40</sup>. Hasta  el a&ntilde;o 1950, en que se introdujo la insulina en el tratamiento de la DM, la  mortalidad por NAC era 20%<sup>41</sup>. La mortalidad por NAC observada en  diab&eacute;ticos var&iacute;a entre 4,1% en Inglaterra<sup>40</sup>, 7,6% en Jap&oacute;n<sup>42</sup>,  9% en Canad&aacute; <sup>43</sup>, 4,7% en Alemania<sup>44</sup>, 12,1% en estados  Unidos<sup>46</sup>. En cambio, en no diab&eacute;ticos, la mortalidad actual es  alrededor de 5,1%.</font></p>      <p><font size="2" face="Verdana, Geneva, sans-serif">Un estudio de casos y controles atribuy&oacute; la  mortalidad por NAC a la DM con un OR 1,5 (IC 95% 1,1-2,0)<sup>41</sup>. Est&aacute;  demostrado que el efecto de la DM sobre la susceptibilidad a las infecciones  est&aacute; muy relacionado al s&iacute;ndrome inflamatorio cr&oacute;nico en el que ambos, la  respuesta innata y el sistema inmune adquirido, se encuentran disregulados<sup>41</sup>.  La hiperglicemia altera la funci&oacute;n de los neutr&oacute;filos, disminuye la  quimiotaxis, fagocitosis y destrucci&oacute;n bacteriana<sup>42</sup>.</font></p>      <p><font size="2" face="Verdana, Geneva, sans-serif">Hay art&iacute;culos que demuestran que los niveles  elevados de glucemia al ingreso y la media mantenida durante la internaci&oacute;n por  NAC tienen correlaci&oacute;n con el desenlace fatal. La glucemia media al ingreso de  los sobrevivientes de NAC fue 223,9&plusmn;105,7 mg/dL vs. 311,4&plusmn;155,2 mg/dL en los  &oacute;bitos (p 0,01). La misma diferencia se vio con la HbA1c 7,9&plusmn;1,8% vs 9,2&plusmn;3,9%  (p 0,07) y la glucemia media mantenida durante la internaci&oacute;n: 170,3&plusmn;51,1 mg/dL  vs. 255,3&plusmn;65,5 mg/dL (p &lt;0,0001). El score CURB 65 al ingreso tambi&eacute;n  muestra diferencia entre los diab&eacute;ticos con NAC vivos y fallecidos: 2,1&plusmn;1,1 vs  3,6&plusmn;0,9 (p&lt;0,0001) <sup>42-44</sup>.     <br> </font><font size="2" face="Verdana, Geneva, sans-serif">    <br> La escala CURB-65 es ampliamente utilizado  como predictor de gravedad de la NAC. Utiliza los sgtes. criterios de gravedad:  conciencia alterada, BUN &gt;20 mg/dL, frecuencia respiratoria &gt;30/min,  presi&oacute;n arterial sist&oacute;lica &lt;90 mm Hg &oacute; presi&oacute;n arterial diast&oacute;lica &lt;60 mm  Hg y edad &gt;65 a&ntilde;os. Este score ha demostrado elevada sensibilidad para  predecir admisi&oacute;n a Terapia intensiva (75%), sepsis severa (76%), necesidad de  ventilaci&oacute;n mec&aacute;nica (77%) y falla terap&eacute;utica (60%)<sup>45</sup>. </font></p>     ]]></body>
<body><![CDATA[<p>&nbsp;</p>      <p><font size="3" face="Verdana, Geneva, sans-serif"><b>Objetivos</b></font></p> <ul type="disc"><font size="2" face="Verdana, Geneva, sans-serif">       <li>Determinar el efecto de la DM en el tiempo de internaci&oacute;n y frecuencia de mortalidad en NAC.       <li>Describir  las variables demogr&aacute;ficas y cl&iacute;nicas en ambas cohortes       <li>Relacionar la escala CURB-65 al ingreso y la mortalidad</li> </font>     </ul>       <p>&nbsp;</p>     <p><font size="3" face="Verdana, Geneva, sans-serif"><b>Metodolog&iacute;a</b></font></p>      <p><font size="2" face="Verdana, Geneva, sans-serif"><b>Dise&ntilde;o del estudio: </b>cohortes  transversal</font></p>     <p><font size="2" face="Verdana, Geneva, sans-serif"><b>Poblaci&oacute;n de estudio:</b>    ]]></body>
<body><![CDATA[<br>   Cohorte 1: varones y mujeres, mayores de 16 a&ntilde;os, con DM  y NAC, ingresados al Hospital Nacional en los a&ntilde;os 2013- 2014    <br>   Cohorte 2: varones y mujeres, mayores de 16 a&ntilde;os,  portadores de NAC, sin DM, ingresados al Hospital Nacional en los a&ntilde;os 2013-  2014</font></p>     <p><font size="2" face="Verdana, Geneva, sans-serif"><b>Criterios  de inclusi&oacute;n</b>    <br>   Pacientes con NAC confirmada por cuadro cl&iacute;nico,  radiograf&iacute;a de t&oacute;rax y/o bacteriolog&iacute;a    <br>   DM tipo 1 y 2, para cohorte 1, sin diferenciaci&oacute;n  entre presencia o no de da&ntilde;o de &oacute;rganos blanco, tipo de tratamiento ni duraci&oacute;n  de la DM Pacientes con o sin inmunodepresi&oacute;n (SIDA,  corticoterapia)</font></p>     <p><font size="2" face="Verdana, Geneva, sans-serif"><b>Criterios de exclusi&oacute;n:</b>datos  incompletos en la ficha cl&iacute;nica</font></p>     <p><font size="2" face="Verdana, Geneva, sans-serif"><b>Muestreo:</b>no probabil&iacute;stico de casos consecutivos</font></p>     <p><font size="2" face="Verdana, Geneva, sans-serif"><b>Variables </b>    <br>   Demogr&aacute;ficas: edad, sexo, comorbilidades (obesidad,  hipertensi&oacute;n arterial), tabaquismo    <br>   Cl&iacute;nica: gravedad de la NAC (escala CURB-65)    ]]></body>
<body><![CDATA[<br>   Predictora: DM    <br> Desenlaces: mortalidad y tiempo de internaci&oacute;n</font></p>     <p><font size="2" face="Verdana, Geneva, sans-serif"><b>Reclutamiento</b>    <br>   Se recurri&oacute; al Servicio de Bioestad&iacute;stica para obtener  las fichas de los pacientes dados de alta con el diagn&oacute;stico de NAC en el  tiempo establecido; posteriormente se extrajeron las variables de los  expedientes m&eacute;dicos obrantes en Archivo.</font></p>     <p><font size="2" face="Verdana, Geneva, sans-serif"><b>Hip&oacute;tesis </b>    <br>   Se consider&oacute; a la mortalidad como la principal  variable de desenlace     <br>   H<sup>0</sup>  No existe diferencia estad&iacute;sticamente significativa en la frecuencia de  mortalidad entre ambas cohortes    <br>   Ha<sup>1</sup> La frecuencia de  mortalidad es estad&iacute;sticamente mayor en la cohorte 1    <br>   Ha<sup>2</sup> La frecuencia de  mortalidad es estad&iacute;sticamente mayor en la cohorte 2</font></p>     <p><font size="2" face="Verdana, Geneva, sans-serif"><b>C&aacute;lculo de tama&ntilde;o de la muestra</b>    ]]></body>
<body><![CDATA[<br>   Se utiliz&oacute; la mortalidad como principal variable de  desenlace.    <br>   Se esper&oacute; una mortalidad de 30% en la cohorte 1<sup>47</sup> y  de 3% en la cohorte 2<sup>47</sup>. Con el programa estad&iacute;stico EPI  INFO 7<sup>&reg;</sup> se calcul&oacute; un tama&ntilde;o m&iacute;nimo en 29 sujetos para la cohorte 1  y 29 sujetos para la cohorte 2, utilizando un error alfa 5% y error beta 20%.</font></p>     <p><font size="2" face="Verdana, Geneva, sans-serif"><b>Gesti&oacute;n de datos:</b> las variables  fueron registradas en una planilla electr&oacute;nica y fueron sometidas a estad&iacute;stica  anal&iacute;tica con el programa EPI INFO 7<sup>&reg;</sup>. Las variables cuantitativas  fueron analizadas con la prueba ANOVA y las cualitativas con la prueba Chi<sup>2</sup>.  Se consider&oacute; significativo todo valor de p&lt; 0,05. Se calcul&oacute; el RR con IC  95%.</font></p>     <p><font size="2" face="Verdana, Geneva, sans-serif"><b>Aspectos &eacute;ticos: </b>se respetaron los principios de la Bio&eacute;tica<b>. </b>Se mantuvo la confidencialidad de los datos  personales.</font></p>      <p>&nbsp;</p>     <p><font size="3" face="Verdana, Geneva, sans-serif"><b>Resultados</b></font></p>     <p><font size="2" face="Verdana, Geneva, sans-serif">Se detectaron 136 pacientes con NAC  ingresados al Hospital Nacional de Itaugu&aacute; durante el periodo comprendido entre  el 2013 y el 2014, de los cuales fueron seleccionados los pacientes que  cumplieron con los criterios de inclusi&oacute;n para este estudio. La cohorte 1  (pacientes con DM) se conform&oacute; con 32 sujetos y la cohorte 2 (pacientes sin DM)  se constituy&oacute; con 104 pacientes.</font></p>     <p><font size="2" face="Verdana, Geneva, sans-serif">Ambas  cohortes eran comparables por sus caracter&iacute;sticas demogr&aacute;ficas, presencia de  comorbilidades y escala CURB-65 (<a href="#2a03t1">tabla 1</a>)</font></p>     <p align="center"><a name="2a03t1"></a><img src="/img/revistas/spmi/v2n2/2a03t1.jpg"></p>     <p><font size="2" face="Verdana, Geneva, sans-serif">Fallecieron 11 pacientes, de los cuales  3 (9%) corresponden a sujetos con DM al ingreso y 8 (7%) con glicemia normal,  encontr&aacute;ndose un RR= 0,97 (IC 95%, 0,8-1,1) y valor p= 0,6 (prueba Chi<sup>2</sup>).  Se observ&oacute; mayor estad&iacute;a hospitalaria en pacientes con DM al ingreso (<a href="#2a03t2">tabla 2</a>).</font></p>     ]]></body>
<body><![CDATA[<p align="center"><a name="2a03t2"></a><img src="/img/revistas/spmi/v2n2/2a03t2.jpg"></p>     <p>&nbsp;</p>     <p><font size="2" face="Verdana, Geneva, sans-serif">Se realiz&oacute; un cruce entre la variable CURB-65 y la  mortalidad. Se encontr&oacute; un CURB-65 medio 1,1&plusmn;0,9 en sujetos vivos al alta y  2,2&plusmn;0,7 en pacientes que obitaron, con valor p= 0,0004 (ANOVA).</font></p>     <p>&nbsp;</p>      <p><font size="3" face="Verdana, Geneva, sans-serif"><b>Discusi&oacute;n</b></font></p>      <p><font size="2" face="Verdana, Geneva, sans-serif">La neumon&iacute;a es un problema de salud  p&uacute;blica debido a la elevada morbimortalidad y alto costo econ&oacute;mico y social que  conlleva; tanto los adultos mayores asi como las personas que presentan  factores de riesgo para la comorbilidad son los grupos que m&aacute;s se asocian a  complicaciones por esta enfermedad<sup>39</sup>. En las  muestras se encontr&oacute; que 58 pacientes (42,65%) presentaba alguna comorbilidad  asociada, lo cual no es infrecuente en nuestra poblaci&oacute;n hospitalaria.</font></p>      <p><font size="2" face="Verdana, Geneva, sans-serif">La  hiperglucemia leve a moderada en la admisi&oacute;n hospitalaria (109-199 mg/dL) tiene  un impacto m&aacute;s acentuado en la mortalidad a los 90 d&iacute;as en los pacientes con  NAC y DM preexistente. Varios autores comprobaron que los pacientes con DM  mostraron mayor riesgo de muerte dentro de los 90 d&iacute;as independientemente de su  valor gluc&eacute;mico en la admisi&oacute;n, que la mayor&iacute;a de las muertes ocurrieron  temprano<sup>43,44</sup>. Los resultados indican que tanto el metabolismo de la  glucosa como la DM de larga evoluci&oacute;n influyen en la muerte por NAC<sup>13,14</sup>.</font></p>      <p><font size="2" face="Verdana, Geneva, sans-serif">En este  estudio se encontr&oacute; asociaci&oacute;n entre hiperglicemia al ingreso y mayor tiempo de  estad&iacute;a hospitalaria, pero dicho resultado no fue significativo, tal vez por el  tama&ntilde;o de muestra. Tampoco se encontr&oacute; una relaci&oacute;n entre la mortalidad y la  DM, lo cual  pudo deberse a que no se evalu&oacute; la gravedad de la DM en cuanto a tiempo de evoluci&oacute;n,  da&ntilde;o de &oacute;rganos blanco ni grado de control metab&oacute;lico. La mayor frecuencia de tabaquismo y  comorbilidades en la cohorte sin DM, sin bien no fue estad&iacute;sticamente  significativa, tal vez pudo influenciar para que los d&iacute;as de internaci&oacute;n y la  mortalidad no sean m&aacute;s elevados en la cohorte con DM. Deber&iacute;a realizarse otra  investigaci&oacute;n donde estos factores, que pueden influenciar en estos desenlaces,  sean pareados entre ambas cohortes y evitar estas variables de confusi&oacute;n.</font></p>      <p><font size="2" face="Verdana, Geneva, sans-serif"> En el an&aacute;lisis entre CURB-65 y la mortalidad  se encontr&oacute; un valor medio 1,1&plusmn;0,9 en alta vivo y 2,2&plusmn;0,7 en pacientes que  obitaron (p 0,0004). Esta escala, como &iacute;ndice de gravedad, permite predecir el  riesgo de muerte en adultos hospitalizados con NAC en nuestro medio, as&iacute; como  lo demostraron otros estudios<sup>42,45</sup>. La Sociedad Brit&aacute;nica del  T&oacute;rax estableci&oacute; que la presencia de m&aacute;s de 2 de estos criterios aumenta 21  veces el riesgo de muerte<sup>48</sup>.</font></p>      <p><font size="2" face="Verdana, Geneva, sans-serif">En esta investigaci&oacute;n no se pudo evaluar el efecto de  la vacuna antigripal en los pacientes, por falta de datos concretos<sup>49</sup>.  Tampoco se evalu&oacute; las causas del &oacute;bito, la influencia de las comorbilidades, los  g&eacute;rmenes aislados ni los antibi&oacute;ticos utilizados<sup>22</sup>. Estas variables deber&iacute;an  considerarse en otra investigaci&oacute;n. Tampoco se evalu&oacute; la  gravedad de la DM en cuanto a tiempo de evoluci&oacute;n, da&ntilde;o de &oacute;rganos blanco y  control metab&oacute;lico. Es sabido que la mayor mortalidad (32%)  se relaciona a la presencia de ciertos g&eacute;rmenes (<i>Pseudomonas aeruginosa</i>, <i>Klebsiella</i>, <i>Escherichia coli</i>, <i>Staphylococcus  aureus</i>) mientras que las menores se asocian a <i>Mycoplasma pneumoniae</i> (1,4%). Mortalidad intermedia se observa con <i>Streptococcus pneumoniae</i>, <i>Chlamydia pneumoniae</i> (12 a 15%) e  influenza A (9%)<sup>47</sup>.</font></p>      ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana, Geneva, sans-serif">Concluyendo,  se encontr&oacute; que la hiperglicemia al ingreso no es un factor influyente tanto en  los d&iacute;as de internaci&oacute;n como en la mortalidad en pacientes diab&eacute;ticos como no  diab&eacute;ticos. Se observ&oacute; un predominio del sexo femenino en  pacientes no diab&eacute;ticos con NAC, en cambio en los diab&eacute;ticos fue predominante  el sexo masculino. Se demostr&oacute;  que el CURB-65 es el &uacute;nico predictor significativo de mortalidad en pacientes  con NAC. Aplicar la  escala del CURB-65 al ingreso es &uacute;til en la predicci&oacute;n de riesgo de muerte en  los pacientes de Medicina Interna. </font></p>        <p>&nbsp;</p>      <p><font size="3" face="Verdana, Geneva, sans-serif"><b>Referencias Bibliogr&aacute;ficas</b></font></p>     <!-- ref --><p><font size="2" face="Verdana, Geneva, sans-serif">1. Rello J.  Demographics, guidelines, and clinical experience in severe community-acquired  pneumonia. Crit Care.  2008; 12 Suppl 6: S2.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=228599&pid=S2312-3893201500020000300001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     <!-- ref --><p><font size="2" face="Verdana, Geneva, sans-serif">2. Rudan I,  O&#39; Brien KL, Nair H, Liu L, Theodoratou E, Qazi S, et al. Epidemiology and  etiology of childhood pneumonia in 2010: estimates of incidence, severe  morbidity, mortality, underlying risk factors and causative pathogens for 192  countries. J Glob Health. 2013 Jun; 3(1): 010401.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=228601&pid=S2312-3893201500020000300002&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     <!-- ref --><p><font size="2" face="Verdana, Geneva, sans-serif">3. Wunderink  RG, Waterer GW. Community-acquired pneumonia: pathophysiology and host factors  with focus on possible new approaches to management of lower respiratory tract  infections. Infect Dis Clin North Am. 2004 Dec; 18(4): 743-59 </font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=228603&pid=S2312-3893201500020000300003&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p><font size="2" face="Verdana, Geneva, sans-serif">4. Strieter  RM, Belperio JA, Keane MP. Host innate defenses in the lung: the role of  cytokines. Curr Opin Infect Dis. 2003 Jun; 16(3): 193-8.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=228604&pid=S2312-3893201500020000300004&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --> </font></p>     ]]></body>
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<body><![CDATA[<p><font size="2" face="Verdana, Geneva, sans-serif"><b>Art&iacute;culo recibido:</b> 3 marzo 2015&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b>Art&iacute;culo  aceptado: </b>30 julio 2015</font></p>     <p><font size="2" face="Verdana, Geneva, sans-serif"><b>Autor  correspondiente</b>    <br>   Dra. Deisy Gabriela Cardozo Jim&eacute;nez    <br>   Direcci&oacute;n: Dpto. de Medicina Interna. Hospital Nacional.  Itaugu&aacute;, Paraguay    <br>   Tel&eacute;fono: (595) 971.341534    <br> Correo electr&oacute;nico:<a href="mailto:chochigc@hotmail.com">chochigc@hotmail.com</a></font></p>     <p><font size="2" face="Verdana, Geneva, sans-serif"><sup><a name="corresp" id="corresp"></a><a href="#autor">1</a></sup>M&eacute;dico Residente del Postgrado en Medicina Interna en  Hospital Nacional (Itaugu&aacute;, Paraguay). Universidad Nacional de Itap&uacute;a  (Paraguay).</font></p>     <p>&nbsp;</p>      ]]></body><back>
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