<?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>0034-7493</journal-id>
<journal-title><![CDATA[Revista Cubana de Cirugía]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Cubana Cir]]></abbrev-journal-title>
<issn>0034-7493</issn>
<publisher>
<publisher-name><![CDATA[Editorial Ciencias Médicas]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0034-74932019000300004</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Factores de riesgo para la aparición de abscesos intrabdominales tras la apendicectomía]]></article-title>
<article-title xml:lang="en"><![CDATA[Risk factors for the appearance of intra-abdominal abscesses after appendectomy]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fortea-Sanchis]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Forcadell-Comes]]></surname>
<given-names><![CDATA[Erica]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Escrig Sos]]></surname>
<given-names><![CDATA[Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Hospital Provincial de Castellón Servicio de Cirugía General y Digestiva ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>España</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Centro de salud de Oropesa  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>España</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2019</year>
</pub-date>
<volume>58</volume>
<numero>3</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S0034-74932019000300004&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S0034-74932019000300004&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S0034-74932019000300004&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Introducción:  Los abscesos intrabdominales son las complicaciones posapendicectomía que más frecuentemente provoca ingresos hospitalarios.  Objetivo:  Estudiar los factores de riesgo para la aparición de abscesos intrabdominales posapendicectomía.  Métodos:  Se realizó un estudio retrospectivo de pacientes mayores de 14 años, intervenidos por sospecha de apendicitis aguda mediante apendicectomía laparoscópica, desde el 1 de enero de 2007 al 31 de diciembre de 2010. Se utilizaron los tests estadísticos Chi cuadrado, Prueba exacta de Fisher, T de Student y regresión logística.  Resultados:  Durante los 4 años del estudio, 672 pacientes padecieron con síntomas y signos compatibles con apendicitis aguda. Apareció un absceso intrabdominal en 35 casos (5,2 %). En el análisis multivariante mediante regresión logística se constataron como posibles factores de riesgo: las formas avanzadas de apendicitis (p &lt; 0,0001), las cuales aumentaron el riesgo en unas 6 veces (IC 95 % 2,2-14,9) y el sexo masculino (p = 0,033), también podrían aumentar el riesgo unas 2,5veces (IC 95 % 1-6).  Conclusiones:  Los posibles factores de riesgo para la aparición de abscesos intrabdominales tras apendicectomía son el sexo masculino y el estadio avanzado, siendo este último el factor más influyente.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Introduction:  Intra-abdominal abscesses are the post-appendectomy complications that most frequently cause hospital admissions.  Objective:  To study the risk factors for the appearance of post-appendectomy intra-abdominal abscesses.  Methods:  A retrospective study of patients over 14 years of age, operated on for suspected acute appendicitis by laparoscopic appendectomy, was performed from January 1, 2007 to December 31, 2010. Chi-square statistical tests, Fisher's exact test were used. Student's t and logistic regression.  Results:  During the 4 years of the study, 672 patients suffered with symptoms and signs compatible with acute appendicitis. An intra-abdominal abscess appeared in 35 cases (5.2%). In the multivariate analysis using logistic regression, the following possible risk factors were found: advanced forms of appendicitis (p &lt;0.0001), which increased the risk by about 6 times (95% CI 2.2-14.9) and male sex (p = 0.033), could also increase the risk about 2.5 times (95% CI 1-6).  Conclusions:  Possible risk factors for the appearance of intra-abdominal abscesses after appendectomy are male sex and advanced stage, the latter being the most influential factor.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[apendicitis]]></kwd>
<kwd lng="es"><![CDATA[laparoscopia]]></kwd>
<kwd lng="es"><![CDATA[absceso]]></kwd>
<kwd lng="es"><![CDATA[complicaciones]]></kwd>
<kwd lng="en"><![CDATA[appendicitis]]></kwd>
<kwd lng="en"><![CDATA[laparoscopy]]></kwd>
<kwd lng="en"><![CDATA[abscess]]></kwd>
<kwd lng="en"><![CDATA[complications]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Addiss]]></surname>
<given-names><![CDATA[DG]]></given-names>
</name>
<name>
<surname><![CDATA[Shaffer]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Fowler]]></surname>
<given-names><![CDATA[BS]]></given-names>
</name>
<name>
<surname><![CDATA[Tauxe]]></surname>
<given-names><![CDATA[RV]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The epidemiology of appendicitis and appendectomy in the United States]]></article-title>
<source><![CDATA[Am J Epidemiol]]></source>
<year>1990</year>
<volume>132</volume>
<page-range>910-25</page-range></nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Eriksson]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Granström]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Randomized controlled trial of appendicectomy versus antibiotic therapy for acute appendicitis]]></article-title>
<source><![CDATA[Br J Surg]]></source>
<year>1995</year>
<volume>82</volume>
<page-range>166-9</page-range></nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sauerland]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Lefering]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Neugebauer]]></surname>
<given-names><![CDATA[EA]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Laparoscopic versus open surgery for suspected appendicitis]]></article-title>
<source><![CDATA[Cochrane Database Syst Rev]]></source>
<year>2002</year>
<volume>1</volume>
<page-range>CD001546</page-range></nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sauerland]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Lefering]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Neugebauer]]></surname>
<given-names><![CDATA[EAM]]></given-names>
</name>
</person-group>
<source><![CDATA[Cirugía laparoscópica versus cirugía abierta en pacientes con sospecha de apendicitis]]></source>
<year>2008</year>
<page-range>2</page-range><publisher-name><![CDATA[Biblioteca Cochrane Plus]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gil Piedra]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Morales García]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Bernal Marco]]></surname>
<given-names><![CDATA[JM]]></given-names>
</name>
<name>
<surname><![CDATA[Llorca Díaz]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Marton Bedia]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Naranjo Gómez]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Apendicitis aguda complicada Abordaje abierto comparado con el laparoscópico]]></article-title>
<source><![CDATA[Cir Esp]]></source>
<year>2008</year>
<volume>83</volume>
<page-range>309-12</page-range></nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Katkhouda]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Friedlander]]></surname>
<given-names><![CDATA[MH]]></given-names>
</name>
<name>
<surname><![CDATA[Grant]]></surname>
<given-names><![CDATA[SW]]></given-names>
</name>
<name>
<surname><![CDATA[Achanta]]></surname>
<given-names><![CDATA[KK]]></given-names>
</name>
<name>
<surname><![CDATA[Essani]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Paik]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Intraabdominal abscess rate after laparoscopic appendectomy]]></article-title>
<source><![CDATA[Am J Surg]]></source>
<year>2000</year>
<volume>180</volume>
<page-range>456-9</page-range></nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Levin]]></surname>
<given-names><![CDATA[DE]]></given-names>
</name>
<name>
<surname><![CDATA[Pegoli]]></surname>
<given-names><![CDATA[W Jr]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Abscess After Appendectomy Predisposing Factors]]></article-title>
<source><![CDATA[Adv Surg]]></source>
<year>2015</year>
<volume>49</volume>
<page-range>263-80</page-range></nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ingraham]]></surname>
<given-names><![CDATA[AM]]></given-names>
</name>
<name>
<surname><![CDATA[Cohen]]></surname>
<given-names><![CDATA[ME]]></given-names>
</name>
<name>
<surname><![CDATA[Bilimoria]]></surname>
<given-names><![CDATA[KY]]></given-names>
</name>
<name>
<surname><![CDATA[Pritts]]></surname>
<given-names><![CDATA[TA]]></given-names>
</name>
<name>
<surname><![CDATA[Ko]]></surname>
<given-names><![CDATA[CY]]></given-names>
</name>
<name>
<surname><![CDATA[Esposito]]></surname>
<given-names><![CDATA[TJ]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Comparison of outcomes after laparoscopic versus open appendectomy for acute appendicitis at 222 ACS NSQIP hospitals]]></article-title>
<source><![CDATA[Surg]]></source>
<year>2010</year>
<volume>148</volume>
<page-range>625-35</page-range></nlm-citation>
</ref>
<ref id="B9">
<label>9</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Allemann]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Probst]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Demartines]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Schäfer]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Prevention of infectious complications after laparoscopic appendectomy for complicated acute appendicitis--the role of routine abdominal drainage]]></article-title>
<source><![CDATA[Langenbecks Arch Surg]]></source>
<year>2011</year>
<volume>396</volume>
<page-range>63-8</page-range></nlm-citation>
</ref>
<ref id="B10">
<label>10</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vettoretto]]></surname>
<given-names><![CDATA[NF]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A brief review of laparoscopic appendectomy the issues and the evidence]]></article-title>
<source><![CDATA[Tech Coloproctol]]></source>
<year>2011</year>
<volume>15</volume>
<page-range>1-6</page-range></nlm-citation>
</ref>
<ref id="B11">
<label>11</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fleming]]></surname>
<given-names><![CDATA[FJ]]></given-names>
</name>
<name>
<surname><![CDATA[Kim]]></surname>
<given-names><![CDATA[MJ]]></given-names>
</name>
<name>
<surname><![CDATA[Messing]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Gunzler]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Salloum]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Monson]]></surname>
<given-names><![CDATA[JR]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Balancing the risk of postoperative surgical infections a multivariate analysis of factors associated with laparoscopic appendectomy from the NSQIP database]]></article-title>
<source><![CDATA[Ann Surg]]></source>
<year>2010</year>
<volume>252</volume>
<page-range>895-900</page-range></nlm-citation>
</ref>
<ref id="B12">
<label>12</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bliss]]></surname>
<given-names><![CDATA[LA]]></given-names>
</name>
<name>
<surname><![CDATA[Yang]]></surname>
<given-names><![CDATA[CJ]]></given-names>
</name>
<name>
<surname><![CDATA[Kent]]></surname>
<given-names><![CDATA[TS]]></given-names>
</name>
<name>
<surname><![CDATA[Ng]]></surname>
<given-names><![CDATA[SC]]></given-names>
</name>
<name>
<surname><![CDATA[Critchlow]]></surname>
<given-names><![CDATA[JF]]></given-names>
</name>
<name>
<surname><![CDATA[Tseng]]></surname>
<given-names><![CDATA[JF]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Appendicitis in the modern era universal problem and variable treatment]]></article-title>
<source><![CDATA[Surg Endosc]]></source>
<year>2015</year>
<volume>29</volume>
<page-range>1897-902</page-range></nlm-citation>
</ref>
<ref id="B13">
<label>13</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ázaro]]></surname>
<given-names><![CDATA[EM]]></given-names>
</name>
<name>
<surname><![CDATA[Amaral]]></surname>
<given-names><![CDATA[PC]]></given-names>
</name>
<name>
<surname><![CDATA[Ettinger]]></surname>
<given-names><![CDATA[JE]]></given-names>
</name>
<name>
<surname><![CDATA[Souza]]></surname>
<given-names><![CDATA[EL]]></given-names>
</name>
<name>
<surname><![CDATA[Fortes]]></surname>
<given-names><![CDATA[MF]]></given-names>
</name>
<name>
<surname><![CDATA[Alcântara]]></surname>
<given-names><![CDATA[RS]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Laparoscopic versus open appendicectomy a comparative study]]></article-title>
<source><![CDATA[JSLS]]></source>
<year>1999</year>
<volume>3</volume>
<page-range>279-83</page-range></nlm-citation>
</ref>
<ref id="B14">
<label>14</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Yau]]></surname>
<given-names><![CDATA[KK]]></given-names>
</name>
<name>
<surname><![CDATA[Siu]]></surname>
<given-names><![CDATA[WT]]></given-names>
</name>
<name>
<surname><![CDATA[Tang]]></surname>
<given-names><![CDATA[CN]]></given-names>
</name>
<name>
<surname><![CDATA[Yang]]></surname>
<given-names><![CDATA[GP]]></given-names>
</name>
<name>
<surname><![CDATA[Li]]></surname>
<given-names><![CDATA[MK]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Laparoscopic versus open appendectomy for complicated appendicitis]]></article-title>
<source><![CDATA[J Am Coll Surg]]></source>
<year>2007</year>
<volume>205</volume>
<page-range>60-5</page-range></nlm-citation>
</ref>
<ref id="B15">
<label>15</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ball]]></surname>
<given-names><![CDATA[CG]]></given-names>
</name>
<name>
<surname><![CDATA[Kortbeek]]></surname>
<given-names><![CDATA[JB]]></given-names>
</name>
<name>
<surname><![CDATA[Kirkpatrick]]></surname>
<given-names><![CDATA[AW]]></given-names>
</name>
<name>
<surname><![CDATA[Mitchell]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Laparoscopic appendectomy for complicated appendicitis an evaluation of postoperative factors]]></article-title>
<source><![CDATA[Surg Endosc]]></source>
<year>2004</year>
<volume>18</volume>
<page-range>969-73</page-range></nlm-citation>
</ref>
<ref id="B16">
<label>16</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Katsuno]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Nagakari]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Yoshikawa]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Sugiyama]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Fukunaga]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Laparoscopic appendectomy for complicated appendicitis a comparison with open appendectomy]]></article-title>
<source><![CDATA[World J Surg]]></source>
<year>2009</year>
<volume>33</volume>
<page-range>208-14</page-range></nlm-citation>
</ref>
<ref id="B17">
<label>17</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Towfigh]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Chen]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Mason]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Katkhouda]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Chan]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Berne]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Laparoscopic appendectomy significantly reduces length of stay for perforated appendicitis]]></article-title>
<source><![CDATA[Surg Endosc]]></source>
<year>2006</year>
<volume>20</volume>
<page-range>495-9</page-range></nlm-citation>
</ref>
<ref id="B18">
<label>18</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rezola]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Villanueva]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Garay]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Suñol]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Arana]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Intxaurrondo]]></surname>
<given-names><![CDATA[MI]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[La apendicectomía laparoscópica más allá de la curva de aprendizaje]]></article-title>
<source><![CDATA[Cir Pediatr]]></source>
<year>2008</year>
<volume>21</volume>
<page-range>167-72</page-range></nlm-citation>
</ref>
<ref id="B19">
<label>19</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jaffer]]></surname>
<given-names><![CDATA[U]]></given-names>
</name>
<name>
<surname><![CDATA[Cameron]]></surname>
<given-names><![CDATA[AE]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Laparoscopic appendectomy a junior trainee&amp;apos;s learning curve]]></article-title>
<source><![CDATA[JSLS]]></source>
<year>2008</year>
<volume>12</volume>
<page-range>288-91</page-range></nlm-citation>
</ref>
<ref id="B20">
<label>20</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hemmila]]></surname>
<given-names><![CDATA[MR]]></given-names>
</name>
<name>
<surname><![CDATA[Birkmeyer]]></surname>
<given-names><![CDATA[NJ]]></given-names>
</name>
<name>
<surname><![CDATA[Arbabi]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Osborne]]></surname>
<given-names><![CDATA[NH]]></given-names>
</name>
<name>
<surname><![CDATA[Wahl]]></surname>
<given-names><![CDATA[WL]]></given-names>
</name>
<name>
<surname><![CDATA[Dimick]]></surname>
<given-names><![CDATA[JB]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Introduction to propensity scores A case study on the comparative effectiveness of laparoscopic vs open appendectomy]]></article-title>
<source><![CDATA[Arch Surg]]></source>
<year>2010</year>
<volume>145</volume>
<page-range>939-45</page-range></nlm-citation>
</ref>
<ref id="B21">
<label>21</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wei]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Qi]]></surname>
<given-names><![CDATA[CL]]></given-names>
</name>
<name>
<surname><![CDATA[Chen]]></surname>
<given-names><![CDATA[TF]]></given-names>
</name>
<name>
<surname><![CDATA[Zheng]]></surname>
<given-names><![CDATA[ZH]]></given-names>
</name>
<name>
<surname><![CDATA[Huang]]></surname>
<given-names><![CDATA[JL]]></given-names>
</name>
<name>
<surname><![CDATA[Hu]]></surname>
<given-names><![CDATA[BG]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Laparoscopic versus open appendectomy for acute appendicitis a metaanalysis]]></article-title>
<source><![CDATA[Surg Endosc]]></source>
<year>2011</year>
<volume>25</volume>
<page-range>1199-208</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
