<?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>0036-3634</journal-id>
<journal-title><![CDATA[Salud Pública de México]]></journal-title>
<abbrev-journal-title><![CDATA[Salud pública Méx]]></abbrev-journal-title>
<issn>0036-3634</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Salud Pública]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0036-36342016000200197</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Triage strategies in cervical cancer detection in Mexico: methods of the FRIDA Study]]></article-title>
<article-title xml:lang="es"><![CDATA[Estrategias de triage en la detección de cáncer cervical: métodos del estudio FRIDA]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Torres-Ibarra]]></surname>
<given-names><![CDATA[Leticia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lazcano-Ponce]]></surname>
<given-names><![CDATA[Eduardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Franco]]></surname>
<given-names><![CDATA[Eduardo L]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cuzick]]></surname>
<given-names><![CDATA[Jack]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Ávila]]></surname>
<given-names><![CDATA[Mauricio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lorincz]]></surname>
<given-names><![CDATA[Attila]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rivera]]></surname>
<given-names><![CDATA[Berenice]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez]]></surname>
<given-names><![CDATA[Paula]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mendiola-Pastrana]]></surname>
<given-names><![CDATA[Indira]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rudolph]]></surname>
<given-names><![CDATA[Samantha E]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[León-Maldonado]]></surname>
<given-names><![CDATA[Leith]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández]]></surname>
<given-names><![CDATA[Rubí]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barrios]]></surname>
<given-names><![CDATA[Elizabeth]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gravitt]]></surname>
<given-names><![CDATA[Patti]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Moscicki]]></surname>
<given-names><![CDATA[Anna Barbara]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Schmeler]]></surname>
<given-names><![CDATA[Kathleen M]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Flores]]></surname>
<given-names><![CDATA[Yvonne N]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
<xref ref-type="aff" rid="A1"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Méndez-Hernández]]></surname>
<given-names><![CDATA[Pablo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="A a"/>
<xref ref-type="aff" rid="A12"/>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Salmerón]]></surname>
<given-names><![CDATA[Jorge]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Nacional de Salud Pública Centro de Investigación en Salud Poblacional ]]></institution>
<addr-line><![CDATA[Cuernavaca ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Cancerología Unidad de Investigación en Epidemiología del Cáncer ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,McGill University Division of Cancer Epidemiology ]]></institution>
<addr-line><![CDATA[Montreal ]]></addr-line>
<country>Canada</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Queen Mary University of London Centre for Cancer Prevention ]]></institution>
<addr-line><![CDATA[London ]]></addr-line>
<country>United Kingdom</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Instituto Mexicano del Seguro Social Unidad de Investigación Epidemiológica y en Servicios de Salud ]]></institution>
<addr-line><![CDATA[Cuernavaca ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,UC Berkeley Joint Medical Program ]]></institution>
<addr-line><![CDATA[Berkeley ]]></addr-line>
<country>USA</country>
</aff>
<aff id="Af7">
<institution><![CDATA[,Instituto Nacional de Cancerología  ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af8">
<institution><![CDATA[,University of New Mexico Department of Pathology ]]></institution>
<addr-line><![CDATA[Albuquerque ]]></addr-line>
<country>USA</country>
</aff>
<aff id="Af9">
<institution><![CDATA[,University of California Department of Pediatrics ]]></institution>
<addr-line><![CDATA[Los Angeles ]]></addr-line>
<country>USA</country>
</aff>
<aff id="A10">
<institution><![CDATA[,University of Texas MD Anderson Cancer Center Division of Gynecologic Oncology and Reproductive Medicine]]></institution>
<addr-line><![CDATA[Houston ]]></addr-line>
<country>USA</country>
</aff>
<aff id="A11">
<institution><![CDATA[,UCLA Fielding School of Public Health and Jonsson Comprehensive Cancer Center Department of Health Policy and Management]]></institution>
<addr-line><![CDATA[Los Angeles ]]></addr-line>
<country>USA</country>
</aff>
<aff id="A12">
<institution><![CDATA[,Secretaría de Salud Tlaxcala Departamento de Investigación Estatal ]]></institution>
<addr-line><![CDATA[Santa Ana Chiautempan ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="A13">
<institution><![CDATA[,Universidad Autónoma de Tlaxcala Facultad de Ciencias de la Salud ]]></institution>
<addr-line><![CDATA[Zacatelco ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2016</year>
</pub-date>
<volume>58</volume>
<numero>2</numero>
<fpage>197</fpage>
<lpage>210</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0036-36342016000200197&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0036-36342016000200197&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0036-36342016000200197&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Objective: This paper describes the study design and baseline characteristics of the study population, including the first 30 829 women who enrolled in the Forwarding Research for Improved Detection and Access for Cervical Cancer Screening and Triage (FRIDA Study). This is a large population based study that is evaluating the performance and cost-effectiveness of different triage strategies for high-risk HPV (hrHPV) positive women in Mexico.  Materials and methods: The target population is more than 100 000 women aged 30 to 64 years who attend the Cervical Cancer Screening Program in 100 health centers in the state of Tlaxcala, Mexico. Since August 2013, all women in the region have been invited to enroll in the study. The study participants are evaluated to determine hrHPV infection using the Cobas 4800 HPV test. The HPV-16/18 genotyping and cytology triage strategies are performed as reflex tests in all hrHPV-positive participants. Women with a positive HPV-16/18 test and/or abnormal cytology (atypical squamous cells of undetermined significance or worse, ASCUS+) are referred for colposcopy evaluation, where a minimum of four biopsies and an endocervical sample are systematically collected. Histologic confirmation is performed by a standardized panel of pathologists.  Results: Among the 30 829 women who have been screened, the overall prevalence of hrHPV is 11.0%. The overall prevalence of HPV16 and HPV18 are 1.5% and 0.7%, respectively. Cytological abnormalities (ASCUS+) were detected in 11.8% of the hrHPV-positive women. A total of 27.0% (920/3,401) of the hrHPV-positive women were referred to colposcopy because of a positive HPV16/18 test and/or abnormal reflex cytology, (31.6% had only ASCUS+, 53.6% were HPV16/18 positive with a normal cytology result, and 9.5% were positive to both triage tests).  Conclusion: The results of this study will help policy makers and health service providers establish the best practices for triage in cervical cancer screening in Mexico and other countries.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Objetivo: El objetivo de este artículo es describir el diseño del estudio FRIDA y las características basales de las primeras 30 829 mujeres tamizadas. El estudio FRIDA (Forwarding Research for Improved Detection and Access for Cervical Cancer Screening and Triage) es un estudio de demostración con base poblacional diseñado para evaluar el desempeño y costo-efectividad de diferentes alternativas de triage en mujeres VPH de alto riesgo (VPHar) positivas bajo condiciones reales de un programa de tamizaje para cáncer cervical en México.  Material y métodos: La población objetivo la conforman poco más de 100 000 mujeres de 30 a 64 años que asisten al programa de detección oportuna de cáncer cervical en alguno de los 100 centros de salud de la jurisdicción sanitaria 1 de Tlaxcala. Desde agosto de 2013, todas las mujeres son invitadas al estudio. Las participantes del estudio son tamizadas para determinar la infección con VPHar mediante la prueba VPHar Cobas 4800. Se realizan las pruebas de triage de tipificación de VPH16/18 y citología en todas las mujeres con resultados VPHar positivos. Las mujeres con un resultado positivo a VPH16/18 y/o citología anormal (células escamosas atípicas de resultado incierto o peor: ASCUS+) son referidas a evaluación colposcópica, seguida de una colección sistemática de un mínimo de cuatro biopsias cervicales y un cepillado endocervical. La confirmación histológica se lleva a cabo por un panel de patólogos.  Resultados Un total de 30 829 mujeres han sido tamizadas, con una prevalencia de VPHar del 11.0%. La prevalencia global de VPH16 y VPH18 es 1.5% y 0.7%, respectivamente. Se detectó un 11.8% de anormalidades citológicas (ASCUS+). Entre las mujeres VPHar positivas, la prevalencia de un resultado de triage positivo (VPH16/18 o citología anormal) fue 27.0%, distribuido de la siguiente forma, 31.6% de éstos fueron sólo ASCUS+ VPH16/18 negativo, 53.6% fueron VPH 16/18 positivos y citología normal, y 9.5% positivos a ambas pruebas de triage.  Conclusión: Los resultados de este estudio ayudarán tanto a los tomadores de decisiones como a los proveedores de servicios de salud a establecer la mejor estrategia de triage en programas de tamizaje de cáncer cervical basados en VPHar en México y en otros países.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[DNA probes]]></kwd>
<kwd lng="en"><![CDATA[HPV]]></kwd>
<kwd lng="en"><![CDATA[mass screening]]></kwd>
<kwd lng="en"><![CDATA[triage]]></kwd>
<kwd lng="en"><![CDATA[cervical intraepithelial neoplasia]]></kwd>
<kwd lng="en"><![CDATA[Mexico]]></kwd>
<kwd lng="es"><![CDATA[sondas de ADN]]></kwd>
<kwd lng="es"><![CDATA[VPH]]></kwd>
<kwd lng="es"><![CDATA[tamizaje masivo]]></kwd>
<kwd lng="es"><![CDATA[triage]]></kwd>
<kwd lng="es"><![CDATA[neoplasia intraepitelial cervical]]></kwd>
<kwd lng="es"><![CDATA[México]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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