<?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>S0016-38132019000200143</article-id>
<article-id pub-id-type="doi">10.24875/gmm.18004332</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Enfermedad periodontal como factor de riesgo adicional asociado con nacimiento pretérmino en México: un estudio de casos y controles]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez-Molina]]></surname>
<given-names><![CDATA[J. Jesús]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-Cruz]]></surname>
<given-names><![CDATA[María Janeth]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Panduro-Barón]]></surname>
<given-names><![CDATA[J. Guadalupe]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Santibáñez-Escobar]]></surname>
<given-names><![CDATA[Luz Patricia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Quezada-Figueroa]]></surname>
<given-names><![CDATA[Norma Argelia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bedolla-Barajas]]></surname>
<given-names><![CDATA[Martín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Hospital Civil de Guadalajara “Dr. Juan I. Menchaca” Servicio de Neonatología ]]></institution>
<addr-line><![CDATA[Guadalajara Jalisco]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Hospital Civil de Guadalajara “Dr. Juan I. Menchaca” División de Ginecología y Obstetricia ]]></institution>
<addr-line><![CDATA[Guadalajara Jalisco]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Hospital Civil de Guadalajara “Dr. Juan I. Menchaca” Servicio de Cirugía Maxilofacial ]]></institution>
<addr-line><![CDATA[Guadalajara Jalisco]]></addr-line>
<country>México</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad de Guadalajara Centro Universitario de Ciencias de la Salud ]]></institution>
<addr-line><![CDATA[Guadalajara Jalisco]]></addr-line>
<country>México</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Hospital Civil de Guadalajara “Dr. Juan I. Menchaca” Servicio de Alergia e Inmunología Clínica ]]></institution>
<addr-line><![CDATA[Guadalajara Jalisco]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2019</year>
</pub-date>
<volume>155</volume>
<numero>2</numero>
<fpage>143</fpage>
<lpage>148</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0016-38132019000200143&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0016-38132019000200143&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0016-38132019000200143&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción: Las sustancias relacionadas con los microorganismos involucrados en la enfermedad periodontal puedan llegar a la interfaz materno-fetal por vía hematógena y estimular la contractilidad uterina.  Objetivo: Determinar la asociación entre enfermedad periodontal con nacimiento pretérmino.  Método: Estudio de casos y controles de 343 embarazadas pretérmino y 686 de término. Se calculó la edad gestacional por fecha de último periodo menstrual y se confirmó con los métodos de Capurro y Ballard. La enfermedad periodontal se diagnosticó por la profundidad del espacio entre la raíz dental y la encía. La asociación fue medida con regresión logística.  Resultados: La edad de las madres en los casos fue de 23.8 ± 6.7 años y en los controles de 23.2 ± 6.7 años. La enfermedad periodontal estuvo presente en 66.8 % de los casos y 40.5 % de los controles. Los factores asociados con nacimiento pretérmino fueron enfermedad periodontal (RM = 2.26), antecedente de nacimiento pretérmino (RM = 4.96), embarazo no planeado (RM = 2.15), control prenatal deficiente (RM = 2.53), infección de vías urinarias (RM = 2.22), preeclampsia (RM = 4.49), ruptura prematura de membranas amnióticas (RM = 2.59) y nacer por cesárea (RM = 9.15).  Conclusión: La enfermedad periodontal en el embarazo constituyó un factor de riesgo independiente para nacimiento pretérmino.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction: Substances related to microorganisms involved in periodontal disease can reach the maternal-fetal interface via the hematogenous route and stimulate uterine contractility.  Objective: To determine the association between periodontal disease and preterm birth.  Method: Case-control study in 343 preterm and 686 full-term pregnant women. Gestational age was calculated based on the date of the last menstrual period and confirmed with Capurro and Ballard methods. Periodontal disease was diagnosed according to the depth of the space between the tooth root and the gum. The association was measured with logistic regression.  Results: Maternal age of the cases was 23.8 ± 6.7 years, and 23.2 ± 6.7 in the controls. Periodontal disease was present in 66.8% of cases and 40.5% of controls. The factors associated with preterm birth were periodontal disease (Odds ratio [OR] = 2.26), history of preterm birth (OR = 4.96), unplanned pregnancy (OR = 2.15) poor prenatal control (OR = 2.53), urinary tract infection (OR = 2.22), preeclampsia (OR = 4.49), premature rupture of membranes (OR = 2.59) and caesarean section delivery (OR = 9.15).  Conclusion: Periodontal disease in pregnancy was an independent risk factor for preterm birth.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Nacimiento pretérmino]]></kwd>
<kwd lng="es"><![CDATA[Enfermedad periodontal]]></kwd>
<kwd lng="es"><![CDATA[Factores de riesgo]]></kwd>
<kwd lng="en"><![CDATA[Preterm birth]]></kwd>
<kwd lng="en"><![CDATA[Periodontal disease]]></kwd>
<kwd lng="en"><![CDATA[Risk factors]]></kwd>
</kwd-group>
</article-meta>
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