<?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>0016-3813</journal-id>
<journal-title><![CDATA[Gaceta médica de México]]></journal-title>
<abbrev-journal-title><![CDATA[Gac. Méd. Méx]]></abbrev-journal-title>
<issn>0016-3813</issn>
<publisher>
<publisher-name><![CDATA[Academia Nacional de Medicina de México A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0016-38132021000400364</article-id>
<article-id pub-id-type="doi">10.24875/gmm.20000637</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Validez y confiabilidad de la Escala de Fatiga para la Enfermedad Intestinal Inflamatoria en pacientes mexicanos]]></article-title>
<article-title xml:lang="en"><![CDATA[Validity and reliability of the Inflammatory Bowel Disease Fatigue Scale in Mexican patients]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Parra-Holguín]]></surname>
<given-names><![CDATA[Norma N.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fresán-Orellana]]></surname>
<given-names><![CDATA[Ana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Yamamoto-Furusho]]></surname>
<given-names><![CDATA[Jesús K.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán Clínica de Enfermedad Inflamatoria Intestinal ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz Subdirección de Investigaciones Clínicas Laboratorio de Epidemiología Clínica]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2021</year>
</pub-date>
<volume>157</volume>
<numero>4</numero>
<fpage>364</fpage>
<lpage>369</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0016-38132021000400364&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0016-38132021000400364&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0016-38132021000400364&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción: La fatiga es una manifestación extraintestinal de la enfermedad inflamatoria intestinal (EII).  Objetivo: Obtener la validez de constructo, la validez discriminante y la confiabilidad de un instrumento para evaluar una escala de fatiga para EII en pacientes mexicanos.  Métodos: Se incluyeron 200 pacientes con diagnóstico confirmado de EII. Se evaluaron las características demográficas y clínicas actuales del padecimiento. Cada paciente contestó la Escala de Fatiga para EII (IBD-F) y el Índice de Calidad de Sueño de Pittsburgh (PSQI), empleado para determinar la validez discriminante de la IBD-F. Se realizó un análisis factorial de cada sección de la IBD-F, se utilizó la t de Student de muestras independientes para el contraste del PSQI y la confiabilidad se evaluó mediante alfa de Cronbach.  Resultados: Los reactivos de ambas secciones de la IBD-F mostraron altas cargas factoriales, que explicaron 68.3 y 38.4 % de la varianza, respectivamente. El alfa de Cronbach fue &gt; 0.80 en ambas, las cuales discriminaron a los pacientes con mayores alteraciones en el sueño.  Conclusiones: La IBD-F es una escala válida y confiable para pacientes mexicanos con EII. La evaluación objetiva de la fatiga permitirá realizar intervenciones oportunas para disminuir el impacto de esta manifestación en el paciente con EII.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction: Fatigue is an extra-intestinal manifestation of inflammatory bowel disease (IBD).  Objective: To determine the construct validity, discriminant validity and reliability of an instrument for evaluating the Fatigue Scale for IBD in Mexican patients.  Methods: Two hundred patients with an IBD confirmed diagnosis were included. Current demographic and clinical characteristics of the condition were evaluated. Each patient answered the IBD Fatigue Scale (IBD-F) and the Pittsburgh Sleep Quality Index (PSQI), which was used to determine IBD-F discriminant validity. A factor analysis of each IBD-F section was performed, independent sample Student's t-tests were used to contrast the PSQI, and reliability was evaluated using Cronbach's alpha.  Results: The items in both IBD-F sections showed high factor loadings, which explained 68.3 and 38.4 % of variance, respectively. Cronbach's alpha was &gt; 0.80 in both, which discriminated patients with greater sleep disturbances.  Conclusions: IBD-F is a valid and reliable scale for Mexican patients with IBD. Fatigue objective evaluation will allow timely interventions in order to reduce its impact on patients with IBD.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Fatiga]]></kwd>
<kwd lng="es"><![CDATA[Validez]]></kwd>
<kwd lng="es"><![CDATA[Confiabilidad]]></kwd>
<kwd lng="es"><![CDATA[Enfermedad inflamatoria intestinal]]></kwd>
<kwd lng="es"><![CDATA[México]]></kwd>
<kwd lng="en"><![CDATA[Fatigue]]></kwd>
<kwd lng="en"><![CDATA[Validity]]></kwd>
<kwd lng="en"><![CDATA[Reliability]]></kwd>
<kwd lng="en"><![CDATA[Inflammatory bowel disease]]></kwd>
<kwd lng="en"><![CDATA[Mexico]]></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[Patarca]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Cytokines and chronic fatigue syndrome]]></article-title>
<source><![CDATA[Ann N Y Acad Sci]]></source>
<year>2006</year>
<volume>933</volume>
<page-range>185-200</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[Barsevick]]></surname>
<given-names><![CDATA[AM]]></given-names>
</name>
<name>
<surname><![CDATA[Cleeland]]></surname>
<given-names><![CDATA[CS]]></given-names>
</name>
<name>
<surname><![CDATA[Manning]]></surname>
<given-names><![CDATA[DC]]></given-names>
</name>
<name>
<surname><![CDATA[O'Mara]]></surname>
<given-names><![CDATA[AM]]></given-names>
</name>
<name>
<surname><![CDATA[Reeve]]></surname>
<given-names><![CDATA[BB]]></given-names>
</name>
<name>
<surname><![CDATA[-Scott]]></surname>
<given-names><![CDATA[JA]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[ASCPRO recommendations for the assessment of fatigue as an outcome in clinical trials]]></article-title>
<source><![CDATA[J Pain Symptom Manage]]></source>
<year>2010</year>
<volume>39</volume>
<page-range>1086-99</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[Ream]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Richardson]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Fatigue:a concept analysis]]></article-title>
<source><![CDATA[Int J Nurs Stud]]></source>
<year>1996</year>
<volume>33</volume>
<page-range>519-29</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[Romber-Camps]]></surname>
<given-names><![CDATA[MJL]]></given-names>
</name>
<name>
<surname><![CDATA[Dagnelie]]></surname>
<given-names><![CDATA[PC]]></given-names>
</name>
<name>
<surname><![CDATA[Hesselink-van de Krujis]]></surname>
<given-names><![CDATA[MAM]]></given-names>
</name>
<name>
<surname><![CDATA[Kester]]></surname>
<given-names><![CDATA[ADM]]></given-names>
</name>
<name>
<surname><![CDATA[Engels]]></surname>
<given-names><![CDATA[LGJB]]></given-names>
</name>
<name>
<surname><![CDATA[van Deursen]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Fatigue and health-related quality of life in inflammatory bowel disease:results from a population-based study in the Netherlands:the IBD-South Limburg cohort]]></article-title>
<source><![CDATA[Inflamm Bowel Dis]]></source>
<year>2010</year>
<volume>16</volume>
<page-range>2137-47</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[Jonefjäll]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Simrén]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Lasson]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Öhman]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Strid]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Psychological distress, iron deficiency, active disease and female gender are independent risk factors for fatigue in patients with ulcerative colitis]]></article-title>
<source><![CDATA[United Eur Gastroenterol J]]></source>
<year>2017</year>
<volume>6</volume>
<page-range>148-58</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[Chavarría]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Casanova]]></surname>
<given-names><![CDATA[MJ]]></given-names>
</name>
<name>
<surname><![CDATA[Chaparro]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Barreiro-de Acosta]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[-Ezquiaga]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Bujanda]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Prevalence and factors associated with fatigue in patients with inflammatory bowel disease:a multicenter study]]></article-title>
<source><![CDATA[J Crohn's Colitis]]></source>
<year>2019</year>
<volume>13</volume>
<page-range>996-1002</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[Grimstad]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Norheim]]></surname>
<given-names><![CDATA[KB]]></given-names>
</name>
<name>
<surname><![CDATA[Isaksen]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Leitao]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Hetta]]></surname>
<given-names><![CDATA[AK]]></given-names>
</name>
<name>
<surname><![CDATA[Carlsen]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Fatigue in newly diagnosed inflammatory bowel disease]]></article-title>
<source><![CDATA[J Crohns Colitis]]></source>
<year>2015</year>
<volume>9</volume>
<page-range>725-30</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[Nocerino]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Nguyen]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Agrawal]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Mone]]></surname>
<given-names><![CDATA[Am]]></given-names>
</name>
<name>
<surname><![CDATA[Lakhani]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Swaminath]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Fatigue in inflammatory bowel diseases:etiologies and management]]></article-title>
<source><![CDATA[Adv Ther]]></source>
<year>2010</year>
<volume>37</volume>
<page-range>97-112</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[Fresán-Orellana]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Parra-Holguín Yamamoto-Furusho]]></surname>
<given-names><![CDATA[JK]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Mental health factor associated with fatigue in Mexican patients with inflammatory bowel disease]]></article-title>
<source><![CDATA[J Clin Gastroenterol]]></source>
<year>2020</year>
<volume>55</volume>
<page-range>609-14</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[Krupp]]></surname>
<given-names><![CDATA[LB]]></given-names>
</name>
<name>
<surname><![CDATA[LaRocca]]></surname>
<given-names><![CDATA[NG]]></given-names>
</name>
<name>
<surname><![CDATA[Muir-Nash]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Steinberg]]></surname>
<given-names><![CDATA[AD]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The fatigue severity scale. Application to patients with multiple sclerosis and systemic lupus erythematosus]]></article-title>
<source><![CDATA[Arch Neurol]]></source>
<year>1989</year>
<volume>46</volume>
<page-range>1121-3</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[Kleinman]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Zodet]]></surname>
<given-names><![CDATA[MW]]></given-names>
</name>
<name>
<surname><![CDATA[Hakim]]></surname>
<given-names><![CDATA[Z]]></given-names>
</name>
<name>
<surname><![CDATA[Aledort]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Chan]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Krupp]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Psychometric evaluation of the fatigue severity scale for use in chronic hepatitis C]]></article-title>
<source><![CDATA[Qual Life Res]]></source>
<year>2000</year>
<volume>9</volume>
<page-range>499-508</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[Chandran]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
<name>
<surname><![CDATA[Bhella]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Schentag]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Gladman]]></surname>
<given-names><![CDATA[DD]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Functional assessment of chronic illness therapy-fatigue scale is valid in patients with psoriatic arthritis]]></article-title>
<source><![CDATA[Ann Rheum Dis]]></source>
<year>2007</year>
<volume>66</volume>
<page-range>936-9</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[Yellen]]></surname>
<given-names><![CDATA[SB]]></given-names>
</name>
<name>
<surname><![CDATA[Cella]]></surname>
<given-names><![CDATA[DF]]></given-names>
</name>
<name>
<surname><![CDATA[Webster]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Blendowski]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Kaplan]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Measuring fatigue and other anemia-related symptoms with the Functional Assessment of Cancer Therapy (FACT) measurement system]]></article-title>
<source><![CDATA[J Pain Symptom Manag]]></source>
<year>1997</year>
<volume>13</volume>
<page-range>63-74</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[Dittner]]></surname>
<given-names><![CDATA[AJ]]></given-names>
</name>
<name>
<surname><![CDATA[Wessely]]></surname>
<given-names><![CDATA[SC]]></given-names>
</name>
<name>
<surname><![CDATA[Brown]]></surname>
<given-names><![CDATA[RG]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The assessment of fatigue:a practical guide for clinicians and researchers]]></article-title>
<source><![CDATA[J Psychosom Res]]></source>
<year>2004</year>
<volume>56</volume>
<page-range>157-70</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[Czuber-Dochan]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[Norton]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Bassett]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Berliner]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Bredin]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Darvell]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Development and psychometric testing of inflammatory bowel disease fatigue (IBD-F) patient self-assessment scale]]></article-title>
<source><![CDATA[J Crohns Colitis]]></source>
<year>2014</year>
<volume>8</volume>
<page-range>1398-406</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[Knowles]]></surname>
<given-names><![CDATA[SR]]></given-names>
</name>
<name>
<surname><![CDATA[Graff]]></surname>
<given-names><![CDATA[LA]]></given-names>
</name>
<name>
<surname><![CDATA[Wilding]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Hewitt]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Keefer]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Mikocka-Walus]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Quality of life in inflammatory bowel disease:a systematic review and meta-analyses-part I]]></article-title>
<source><![CDATA[Inflamm Bowel Dis]]></source>
<year>2018</year>
<volume>24</volume>
<page-range>742-51</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[Truelove]]></surname>
<given-names><![CDATA[SC]]></given-names>
</name>
<name>
<surname><![CDATA[Witts]]></surname>
<given-names><![CDATA[LJ]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Cortisone in ulcerative colitis;final report on a therapeutic trial]]></article-title>
<source><![CDATA[Br Med J]]></source>
<year>1955</year>
<volume>2</volume>
<page-range>1041-8</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[Harvey]]></surname>
<given-names><![CDATA[RF]]></given-names>
</name>
<name>
<surname><![CDATA[Bradshaw]]></surname>
<given-names><![CDATA[JM]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A simple index of Crohn's disease activity]]></article-title>
<source><![CDATA[Lancet]]></source>
<year>1980</year>
<volume>1</volume>
<page-range>514</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[Hashash]]></surname>
<given-names><![CDATA[JG]]></given-names>
</name>
<name>
<surname><![CDATA[Ramos-Rivers]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Youk]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Chiu]]></surname>
<given-names><![CDATA[WK]]></given-names>
</name>
<name>
<surname><![CDATA[Duff]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Regueiro]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Quality of sleep and coexistent psychopathology have significant impact on fatigue burden in patients with inflammatory bowel disease]]></article-title>
<source><![CDATA[J Clin Gastroenterol]]></source>
<year>2016</year>
<volume>52</volume>
<page-range>1-8</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[Chrobak]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Nowakowski]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Zwoli&#324;ska-Wcis&#322;o]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Cibor]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Prybylska-Felu&#347;]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Ochyra]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Associations between chronotype, sleep disturbances and seasonality with fatigue and inflammatory bowel disease symptoms]]></article-title>
<source><![CDATA[Cronobiol Int]]></source>
<year>2018</year>
<volume>35</volume>
<page-range>1142-52</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[Buysse]]></surname>
<given-names><![CDATA[DJ]]></given-names>
</name>
<name>
<surname><![CDATA[Reynolds]]></surname>
<given-names><![CDATA[CF]]></given-names>
</name>
<name>
<surname><![CDATA[Monk]]></surname>
<given-names><![CDATA[TH]]></given-names>
</name>
<name>
<surname><![CDATA[Berman]]></surname>
<given-names><![CDATA[SR]]></given-names>
</name>
<name>
<surname><![CDATA[Kupfer]]></surname>
<given-names><![CDATA[DJ]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The Pittsburgh sleep quality index:a new instrument for psychiatric practice and research]]></article-title>
<source><![CDATA[Psychiatry Res]]></source>
<year>1989</year>
<volume>28</volume>
<page-range>193-213</page-range></nlm-citation>
</ref>
<ref id="B22">
<label>22</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jiménez-Genchi]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Monteverde-Maldonado]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Nenclares-Portocarrero]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Esquivel-Adame]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Vega-Pachecho]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Confiabilidad y análisis factorial de la versión en español del índice de calidad de sueño de Pittsburgh en pacientes psiquiátricos]]></article-title>
<source><![CDATA[Gac Med Mex]]></source>
<year>2008</year>
<volume>144</volume>
<page-range>491-6</page-range></nlm-citation>
</ref>
<ref id="B23">
<label>23</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tabachnick]]></surname>
<given-names><![CDATA[BF]]></given-names>
</name>
<name>
<surname><![CDATA[Fidell]]></surname>
<given-names><![CDATA[LS]]></given-names>
</name>
</person-group>
<source><![CDATA[Using multivariate statistics]]></source>
<year>2001</year>
<publisher-loc><![CDATA[EE. UU ]]></publisher-loc>
<publisher-name><![CDATA[Allyn and Bacon]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B24">
<label>24</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vestergaard]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Dahlerup]]></surname>
<given-names><![CDATA[JF]]></given-names>
</name>
<name>
<surname><![CDATA[Bager]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Validation of the Danish version of inflammatory bowel diseae self-assessment scale]]></article-title>
<source><![CDATA[Dan Med J]]></source>
<year>2017</year>
<volume>64</volume>
<page-range>A5394</page-range></nlm-citation>
</ref>
<ref id="B25">
<label>25</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lage]]></surname>
<given-names><![CDATA[AC]]></given-names>
</name>
<name>
<surname><![CDATA[Carneiro-Olivera]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Delgado-Bomtempo-Batalha]]></surname>
<given-names><![CDATA[AP]]></given-names>
</name>
<name>
<surname><![CDATA[-Araújo]]></surname>
<given-names><![CDATA[AF]]></given-names>
</name>
<name>
<surname><![CDATA[Czuber-Dochan]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[Fonseca-Chebli]]></surname>
<given-names><![CDATA[JM]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The inflammatory bowel disease-fatigue patient self-assessment scale:translation, cross-cultural adaptaton and psychometric properties of the Brazilian version (IBD-F Brazil)]]></article-title>
<source><![CDATA[Arq Gastroenterol]]></source>
<year>2020</year>
<volume>57</volume>
<page-range>50-63</page-range></nlm-citation>
</ref>
<ref id="B26">
<label>26</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Yamamoto-Furusho]]></surname>
<given-names><![CDATA[JK]]></given-names>
</name>
<name>
<surname><![CDATA[Parra-Holguín]]></surname>
<given-names><![CDATA[NN]]></given-names>
</name>
<name>
<surname><![CDATA[Fresán-Orellana]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[P174 high frequency of fatigue and sleep alterations impact on the quality of life in Mexican patients with inflammatory bowel disease]]></article-title>
<source><![CDATA[J Crohn's Colitis]]></source>
<year>2020</year>
<volume>14</volume>
<page-range>S224-5</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[Farrell]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Artom]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Czuber-Dochan]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[Jelsness-Jørgensen]]></surname>
<given-names><![CDATA[LP]]></given-names>
</name>
<name>
<surname><![CDATA[Nortn]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Svage]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Interventions for fatigue in inflammatory bowel disease]]></article-title>
<source><![CDATA[Cochrane Database Syst Rev]]></source>
<year>2020</year>
<volume>4</volume>
<page-range>CD012005</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
