<?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>0120-3347</journal-id>
<journal-title><![CDATA[Colombian Journal of Anestesiology]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. colomb. anestesiol.]]></abbrev-journal-title>
<issn>0120-3347</issn>
<publisher>
<publisher-name><![CDATA[SCARE-Sociedad Colombiana de Anestesiología y Reanimación]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-33472023000300020</article-id>
<article-id pub-id-type="doi">10.5554/22562087.e1077</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Prognostic predictive model for PONV in cesarean delivery]]></article-title>
<article-title xml:lang="es"><![CDATA[Modelo de predicción pronostica para NVPO en parto por cesárea]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[De La Peña]]></surname>
<given-names><![CDATA[Michael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Giraldo]]></surname>
<given-names><![CDATA[Olga Lucía]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aguirre]]></surname>
<given-names><![CDATA[Daniel Camilo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[De La Peña]]></surname>
<given-names><![CDATA[Ancízar Joaquín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arango]]></surname>
<given-names><![CDATA[José Julián]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez]]></surname>
<given-names><![CDATA[Ricardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Antioquia Academic Clinical Epidemiology Group (GRAEPIC) ]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Antioquia School of Medicine Anesthesiology Service]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Antioquia School of Medicine Institute of Medical Research]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Pontificia Bolivariana School of Medicine ]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Clínica del Prado  ]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,Clínica Universitaria Pontificia Bolivariana  ]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2023</year>
</pub-date>
<volume>51</volume>
<numero>3</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-33472023000300020&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-33472023000300020&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-33472023000300020&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction: Apfel simplified risk score for postoperative nausea and vomiting (PONV) has shown to be useful in anesthesia; however, since it has not been calibrated in regional anesthesia or in pregnant patients, its use in cesarean section is limited.  Objective: To develop a prognostic predictive model for postoperative nausea and vomiting in pregnant patients undergoing cesarean section under spinal anesthesia.  Methods: In a cohort of 703 term pregnant patients scheduled of cesarean section, 15 variables were prospectively assessed, to design a prognostic predictive model for the development of postoperative nausea and vomiting. A logistic regression analysis was used to construct the model and its calibration and discrimination were based on the Hosmer-Lemeshow test, the calibration curves, and C statistic. Additionally, the internal calibration was performed with the Bootstrap resampling method.  Results: Postoperative nausea and vomiting were experienced by 27% of the patients during the first six hours after surgery. The model included as prognostic variables the development of intraoperative nausea and vomiting, age under 28 years, a history of PONV, the mother's BMI and the weight of the newborn baby. The model showed an adequate calibration (x2: 4.65 p: 0.5888), though a low discrimination (Statistic C = 0.68).  Conclusions: A prognostic predictive model was created for the development of PONV in cesarean section. This model was used to build a prognostic scale for the classification of patients into risk groups.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción: La escala de riesgo simplificada de Apfel para náuseas y vómito posoperatorio (NVPO) ha mostrado utilidad en anestesia; sin embargo, al no haber sido calibrada en anestesia regional o en pacientes embarazadas, su utilidad en cesárea es limitado.  Objetivo: Desarrollar un modelo de predicción pronóstica para náuseas y vómito posoperatorios en pacientes embarazadas, llevadas a cesárea bajo anestesia espinal.  Métodos: En una cohorte de 703 pacientes con embarazo a término programadas para cesárea, se evaluaron 15 variables de forma prospectiva para construir un modelo de predicción pronóstica para el desarrollo de náuseas y vómito posoperatorio. Se utilizó el análisis de regresión logística para la construcción del modelo y se calculó su calibración y discriminación con la prueba de Hosmer-Lemeshow, las curvas de calibración y el estadístico C. Además, se realizó la calibración interna con el método de remuestreo Bootstrap.  Resultados: Las náuseas y vómito posoperatorio se presentaron en el 27% de las pacientes durante las primeras seis horas después de la cirugía. El modelo incluyó como variables pro-nósticas el desarrollo de náuseas y vómito en el intraoperatorio, edad menor de 28 años, antecedentes de NVPO, índice de masa corporal (IMC) de la madre y el peso del recién nacido. El modelo mostró una adecuada calibración (x2: 4,65 p: 0,5888), aunque una baja discriminación (Estadístico C = 0,68).  Conclusiones: Se construyó un modelo de predicción pronóstica para el desarrollo de NVPO en cirugía cesárea, y con este se construyó una escala pronóstica que permite clasificar a las pacientes por grupos de riesgo.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Postoperative nausea and vomiting]]></kwd>
<kwd lng="en"><![CDATA[Cesarean section]]></kwd>
<kwd lng="en"><![CDATA[Spinal anesthesia]]></kwd>
<kwd lng="en"><![CDATA[Prognosis]]></kwd>
<kwd lng="en"><![CDATA[Predictive model]]></kwd>
<kwd lng="en"><![CDATA[Anesthesiology]]></kwd>
<kwd lng="es"><![CDATA[Náusea y vómito posoperatorios]]></kwd>
<kwd lng="es"><![CDATA[Cesárea]]></kwd>
<kwd lng="es"><![CDATA[Anestesia espinal]]></kwd>
<kwd lng="es"><![CDATA[Pronóstico]]></kwd>
<kwd lng="es"><![CDATA[Modelo de predicción]]></kwd>
<kwd lng="es"><![CDATA[Anestesiología]]></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[Gan]]></surname>
<given-names><![CDATA[TJ]]></given-names>
</name>
<name>
<surname><![CDATA[Belani]]></surname>
<given-names><![CDATA[KG]]></given-names>
</name>
<name>
<surname><![CDATA[Bergese]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Chung]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Die-munsch]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Habib]]></surname>
<given-names><![CDATA[AS]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Fourth consensus guidelines for the management of postoperative nausea and vomiting]]></article-title>
<source><![CDATA[Anesth Analg]]></source>
<year>2020</year>
<volume>131</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>411-48</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[Griffiths]]></surname>
<given-names><![CDATA[JD]]></given-names>
</name>
<name>
<surname><![CDATA[Gyte]]></surname>
<given-names><![CDATA[GM]]></given-names>
</name>
<name>
<surname><![CDATA[Paranjothy]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Brown]]></surname>
<given-names><![CDATA[HC]]></given-names>
</name>
<name>
<surname><![CDATA[Broughton]]></surname>
<given-names><![CDATA[HK]]></given-names>
</name>
<name>
<surname><![CDATA[Thomas]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Interventions for preventing nausea and vomiting in wo-men undergoing regional anaesthesia for caesarean section]]></article-title>
<source><![CDATA[Cochrane Database of Systematic Reviews]]></source>
<year>2012</year>
<numero>9</numero>
<issue>9</issue>
</nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jelting]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Klein]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Harlander]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Eberhart]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Roewer]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Kranke]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Preventing nausea and vomiting in women undergoing regional anesthesia for cesarean section: challenges and solutions]]></article-title>
<source><![CDATA[Local Reg Anesth]]></source>
<year>2017</year>
<volume>10</volume>
<page-range>83-90</page-range></nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Allen]]></surname>
<given-names><![CDATA[TK]]></given-names>
</name>
<name>
<surname><![CDATA[Jones]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Habib]]></surname>
<given-names><![CDATA[AS]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Dexamethasone for the prophylaxis of postoperative nausea and vomiting associated with neuraxial morphine administration: A systematic review and meta-analysis]]></article-title>
<source><![CDATA[Anesth Analg]]></source>
<year>2012</year>
<volume>114</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>813-22</page-range></nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Apfel]]></surname>
<given-names><![CDATA[CC]]></given-names>
</name>
<name>
<surname><![CDATA[Láàrà]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Koivuranta]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Greim]]></surname>
<given-names><![CDATA[CA]]></given-names>
</name>
<name>
<surname><![CDATA[Roewer]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A simplified risk score for predicting postoperative nausea and vomiting: conclusions from cross-validations between two centers]]></article-title>
<source><![CDATA[Anesthesiology]]></source>
<year>1999</year>
<volume>91</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>693-700</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[Kilpatrick]]></surname>
<given-names><![CDATA[SJ]]></given-names>
</name>
<name>
<surname><![CDATA[Menard]]></surname>
<given-names><![CDATA[MK]]></given-names>
</name>
<name>
<surname><![CDATA[Zahn]]></surname>
<given-names><![CDATA[CM]]></given-names>
</name>
<name>
<surname><![CDATA[Callaghan]]></surname>
<given-names><![CDATA[WM]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Obstetric Care Consensus #9: Levels of Maternal Care: (Replaces Obstetric Care Consensus Number 2, February 2015)]]></article-title>
<source><![CDATA[Am J Obstet Gynecol]]></source>
<year>2019</year>
<volume>221</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>B19-30</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[Bollag]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Lim]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Sultan P Habib]]></surname>
<given-names><![CDATA[AS]]></given-names>
</name>
<name>
<surname><![CDATA[Landau]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Zakowski]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Society for Obstetric Anesthesia and Perinatology: Consensus Statement and Recommendations for Enhanced Recovery After Cesarean]]></article-title>
<source><![CDATA[Anesth Analg]]></source>
<year>2021</year>
<volume>132</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>1362-77</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[Gadsby]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Barnie-Adshead]]></surname>
<given-names><![CDATA[AM]]></given-names>
</name>
<name>
<surname><![CDATA[Jagger]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Pregnancy nausea related to women's obstetric and personal histories]]></article-title>
<source><![CDATA[Gynecol Obstet Invest]]></source>
<year>1997</year>
<volume>43</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>108-11</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[Pierre]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Whelan]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Nausea and vomiting after surgery]]></article-title>
<source><![CDATA[Continuing Education in Anaesthesia, Critical Care &amp; Pain]]></source>
<year>2013</year>
<volume>13</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>28-32</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[Apfel]]></surname>
<given-names><![CDATA[CC]]></given-names>
</name>
<name>
<surname><![CDATA[Heidrich]]></surname>
<given-names><![CDATA[FM]]></given-names>
</name>
<name>
<surname><![CDATA[Jukar-Rao]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Jalota]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Hornuss]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Whelan]]></surname>
<given-names><![CDATA[RP]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Evidence-based analysis of risk factors for postoperative nausea and vomiting]]></article-title>
<source><![CDATA[Br J Anaesth]]></source>
<year>2012</year>
<volume>109</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>742-53</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[Apfel]]></surname>
<given-names><![CDATA[CC]]></given-names>
</name>
<name>
<surname><![CDATA[Kranke P Eberhart]]></surname>
<given-names><![CDATA[LH]]></given-names>
</name>
<name>
<surname><![CDATA[Roos]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Roewer]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Comparison of predictive models for postoperative nausea and vomiting]]></article-title>
<source><![CDATA[Br J Anaesth]]></source>
<year>2002</year>
<volume>88</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>234-40</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[Maharaj]]></surname>
<given-names><![CDATA[CH]]></given-names>
</name>
<name>
<surname><![CDATA[Kallam]]></surname>
<given-names><![CDATA[SR]]></given-names>
</name>
<name>
<surname><![CDATA[Malik]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Hassett P Grady]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Laffey]]></surname>
<given-names><![CDATA[JG]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Preoperative intravenous fluid therapy decreases postoperative nausea and pain in high risk patients]]></article-title>
<source><![CDATA[Anesth Analg]]></source>
<year>2005</year>
<volume>100</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>675-82</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[Moons]]></surname>
<given-names><![CDATA[KG]]></given-names>
</name>
<name>
<surname><![CDATA[Altman]]></surname>
<given-names><![CDATA[DG]]></given-names>
</name>
<name>
<surname><![CDATA[Reitsma]]></surname>
<given-names><![CDATA[JB]]></given-names>
</name>
<name>
<surname><![CDATA[Ioannidis]]></surname>
<given-names><![CDATA[JP]]></given-names>
</name>
<name>
<surname><![CDATA[Macaskill]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Steyerberg]]></surname>
<given-names><![CDATA[EW]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Transparent reporting of a multivariable prediction model for individual prognosis or diagnosis (TRIPOD): explanation and elaboration]]></article-title>
<source><![CDATA[AnnlnternMed]]></source>
<year>2015</year>
<volume>162</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>W1-73</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[Peduzzi P Concato]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Kemper]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Holford]]></surname>
<given-names><![CDATA[TR]]></given-names>
</name>
<name>
<surname><![CDATA[Feinstem]]></surname>
<given-names><![CDATA[AR]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A simulation study of the number of events per variable in logistic regression analysis]]></article-title>
<source><![CDATA[J Clin Epidemiol]]></source>
<year>1996</year>
<volume>49</volume>
<numero>12</numero>
<issue>12</issue>
<page-range>1373-9</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[Gehling]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Tryba]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Risks and side-effects of intrathecal morphine combined with spinal anaesthesia: A meta-analysis]]></article-title>
<source><![CDATA[Anaesthesia]]></source>
<year>2009</year>
<volume>64</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>643-51</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[Paul P Pennell]]></surname>
<given-names><![CDATA[ML]]></given-names>
</name>
<name>
<surname><![CDATA[Lemeshow]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Standardizing the power of the Hosmer-Lemeshow goodness of fit test in large data sets]]></article-title>
<source><![CDATA[Statist Med]]></source>
<year>2013</year>
<volume>32</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>67-80</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[Núñez]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Steyerberg]]></surname>
<given-names><![CDATA[EW]]></given-names>
</name>
<name>
<surname><![CDATA[Núñez]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Regression modeling strategies]]></article-title>
<source><![CDATA[Rev Esp Cardiol]]></source>
<year>2011</year>
<volume>64</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>501-7</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[Hosmer]]></surname>
<given-names><![CDATA[DW]]></given-names>
</name>
<name>
<surname><![CDATA[Lemeshow]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Sturdivant]]></surname>
<given-names><![CDATA[RX]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Model-building strategies and methods for logistic regression. Applied logistic regression]]></article-title>
<source><![CDATA[Third Edit. John Wiley &amp; Sons, Inc]]></source>
<year>2013</year>
<page-range>89-152</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[Sauerbrei]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[Royston P Binder]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Selection of important variables and determination of functional form for continuous predictors in multivariable model building]]></article-title>
<source><![CDATA[Statist Med]]></source>
<year>2007</year>
<volume>26</volume>
<page-range>5512-28</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[Royston]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Moons]]></surname>
<given-names><![CDATA[KGM]]></given-names>
</name>
<name>
<surname><![CDATA[Altman]]></surname>
<given-names><![CDATA[DG]]></given-names>
</name>
<name>
<surname><![CDATA[Vergouwe]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Prognosis and prognostic research: Developing a prognostic model]]></article-title>
<source><![CDATA[BMJ]]></source>
<year>2009</year>
<volume>338</volume>
<page-range>b604</page-range></nlm-citation>
</ref>
<ref id="B21">
<label>21</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Steyerberg]]></surname>
<given-names><![CDATA[EW]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Selection of main effects]]></article-title>
<source><![CDATA[Clinical Prediction Models: A Practical approach to development, validation, and updating]]></source>
<year>2009</year>
<page-range>191-211</page-range><publisher-loc><![CDATA[New York, NY ]]></publisher-loc>
<publisher-name><![CDATA[Springer New York]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B22">
<label>22</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Steyerberg]]></surname>
<given-names><![CDATA[EW]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Study design for prediction models]]></article-title>
<source><![CDATA[Clinical prediction models: A practical approach to development, validation, and updating]]></source>
<year>2009</year>
<page-range>33-52</page-range><publisher-loc><![CDATA[New York, NY ]]></publisher-loc>
<publisher-name><![CDATA[Springer New York]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B23">
<label>23</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bonnett]]></surname>
<given-names><![CDATA[LJ]]></given-names>
</name>
<name>
<surname><![CDATA[Snell]]></surname>
<given-names><![CDATA[KIE]]></given-names>
</name>
<name>
<surname><![CDATA[Collins]]></surname>
<given-names><![CDATA[GS]]></given-names>
</name>
<name>
<surname><![CDATA[Riley]]></surname>
<given-names><![CDATA[RD]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Guide to presenting clinical prediction models for use in clinical settings]]></article-title>
<source><![CDATA[BMJ]]></source>
<year>2019</year>
<volume>365</volume>
<page-range>1737</page-range></nlm-citation>
</ref>
<ref id="B24">
<label>24</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hosmer]]></surname>
<given-names><![CDATA[DW]]></given-names>
</name>
<name>
<surname><![CDATA[Lemeshow]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Sturdivant]]></surname>
<given-names><![CDATA[RX]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Assessing the Fit of the Model. In: Applied logistic regression]]></article-title>
<source><![CDATA[John Wiley &amp; Sons, Inc]]></source>
<year>2013</year>
<page-range>153-225</page-range></nlm-citation>
</ref>
<ref id="B25">
<label>25</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Apfel]]></surname>
<given-names><![CDATA[CC]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Postoperative nausea and vomiting]]></article-title>
<source><![CDATA[Miller Anestesia]]></source>
<year>2015</year>
<edition>8</edition>
<page-range>2947-73</page-range><publisher-name><![CDATA[Elsevier]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B26">
<label>26</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Koivuranta]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Láãrà]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Snãre]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Alahuhta]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A survey of postoperative nausea and vomiting]]></article-title>
<source><![CDATA[Anaesthesia]]></source>
<year>1997</year>
<volume>52</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>443-9</page-range></nlm-citation>
</ref>
<ref id="B27">
<label>27</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Weibel]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Rücker]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Eberhart]]></surname>
<given-names><![CDATA[LHJ]]></given-names>
</name>
<name>
<surname><![CDATA[Pace]]></surname>
<given-names><![CDATA[NL]]></given-names>
</name>
<name>
<surname><![CDATA[Hartl]]></surname>
<given-names><![CDATA[HM]]></given-names>
</name>
<name>
<surname><![CDATA[Jordan]]></surname>
<given-names><![CDATA[OL]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Drugs for preventing postoperative nausea and vomiting in adults after general anaesthesia: a network meta-analysis]]></article-title>
<source><![CDATA[Cochrane Database of Systematic Reviews]]></source>
<year>2020</year>
<volume>2020</volume>
<numero>11</numero>
<issue>11</issue>
</nlm-citation>
</ref>
<ref id="B28">
<label>28</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Marrón-Peña]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Náusea y vómito perioperatorio en anestesia obstétrica y ginecológica]]></article-title>
<source><![CDATA[Revista Mexicana de Anestesiología]]></source>
<year>2013</year>
<volume>36</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>348-55</page-range></nlm-citation>
</ref>
<ref id="B29">
<label>29</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chao]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Evangelista]]></surname>
<given-names><![CDATA[LS]]></given-names>
</name>
<name>
<surname><![CDATA[Rietzel]]></surname>
<given-names><![CDATA[KL]]></given-names>
</name>
<name>
<surname><![CDATA[Artinian]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Mullen]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Examining the predictors of postoperative nausea and vomiting in women following cesarean delivery]]></article-title>
<source><![CDATA[J Obstet, Gynecol Neonatal Nurs]]></source>
<year>2013</year>
<volume>42</volume>
<page-range>S84</page-range></nlm-citation>
</ref>
<ref id="B30">
<label>30</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Balla]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Baraz]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Audit of postoperative nausea and vomiting in obstetrics]]></article-title>
<source><![CDATA[Anaesthesia]]></source>
<year>2014</year>
<volume>69</volume>
<numero>^s3</numero>
<issue>^s3</issue>
<supplement>3</supplement>
<page-range>25</page-range></nlm-citation>
</ref>
<ref id="B31">
<label>31</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Domínguez]]></surname>
<given-names><![CDATA[JE]]></given-names>
</name>
<name>
<surname><![CDATA[Habib]]></surname>
<given-names><![CDATA[AS]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Prophylaxis and treatment of the side-effects of neuraxial morphine analgesia following cesarean delivery]]></article-title>
<source><![CDATA[Curr Opin Anaesthesiol]]></source>
<year>2013</year>
<volume>26</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>288-95</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
