<?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>1889-836X</journal-id>
<journal-title><![CDATA[Revista de Osteoporosis y Metabolismo Mineral]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Osteoporos Metab Miner]]></abbrev-journal-title>
<issn>1889-836X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Española de Investigaciones Óseas y Metabolismo Mineral]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1889-836X2021000200003</article-id>
<article-id pub-id-type="doi">10.4321/s1889-836x2021000200003</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Influencia de la lactancia materna en el metabolismo mineral óseo después de la menopausia]]></article-title>
<article-title xml:lang="en"><![CDATA[Influence of breastfeeding on bone mineral metabolism after menopause]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carreras-Díaz]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Saavedra-Santana]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gómez de Tejada-Romero]]></surname>
<given-names><![CDATA[MJ]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="A a"/>
<xref ref-type="aff" rid="A03"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martín-Martínez]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sosa-Henríquez]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="A a"/>
<xref ref-type="aff" rid="A05"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad de Las Palmas de Gran Canaria Grupo de Investigación en Osteoporosis y Metabolismo Mineral ]]></institution>
<addr-line><![CDATA[Las Palmas de Gran Canaria ]]></addr-line>
<country>España</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Universidad de Las Palmas de Gran Canaria Departamento de Matemáticas ]]></institution>
<addr-line><![CDATA[Las Palmas de Gran Canaria ]]></addr-line>
<country>España</country>
</aff>
<aff id="A03">
<institution><![CDATA[,Universidad de Sevilla Departamento de Medicina ]]></institution>
<addr-line><![CDATA[Sevilla ]]></addr-line>
<country>España</country>
</aff>
<aff id="A04">
<institution><![CDATA[,Hospital Materno-Infantil Servicio de Ginecología y Obstetricia ]]></institution>
<addr-line><![CDATA[Las Palmas de Gran Canaria ]]></addr-line>
<country>España</country>
</aff>
<aff id="A05">
<institution><![CDATA[,Hospital Universitario Insular Unidad Metabólica Ósea ]]></institution>
<addr-line><![CDATA[Las Palmas de Gran Canaria ]]></addr-line>
<country>España</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2021</year>
</pub-date>
<volume>13</volume>
<numero>2</numero>
<fpage>58</fpage>
<lpage>65</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_arttext&amp;pid=S1889-836X2021000200003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_abstract&amp;pid=S1889-836X2021000200003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.isciii.es/scielo.php?script=sci_pdf&amp;pid=S1889-836X2021000200003&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Objetivo Los estilos de vida y la historia ginecológica parecen influir en el metabolismo mineral óseo. Existen datos contradictorios sobre los posibles efectos de la lactancia materna en el posterior desarrollo de una osteoporosis densitométrica o la aparición de fracturas por fragilidad. El objetivo de este estudio fue valorar dichos efectos.  Material y métodos Estudio observacional, transversal, abierto, realizado en 758 mujeres postmenopáusicas que fueron clasificadas en dos grupos, dependiendo de que hubieran lactado a sus hijos o no. Se recogieron datos sobre estilos de vida, historia ginecológica y fracturas por fragilidad. Se les realizó una analítica general, con función renal, hepática, lípidos, iones, así como marcadores bioquímicos de remodelado óseo, hormona paratiroidea (PTH) y vitamina D (25HCC). Se les determinó la densidad mineral ósea (DMO) en la columna lumbar y en la extremidad proximal del fémur mediante absorciometría dual de rayos X (DXA). Así mismo se les realizó una medición mediante ultrasonografía cuantitativa (QUS) en el calcáneo del pie dominante. Los datos crudos, después de ser comparados por grupos, fueron ajustados aplicando el método de pareamiento por puntuación de propensión o propensity score matching, realizándose una comparación más precisa de las variables estudiadas.  Resultados Los resultados previos a la aplicación del propensity score fueron ajustados por la edad y el índice de masa corporal (IMC), dado que en el estudio basal se apreciaron diferencias significativas en estas variables entre ambos grupos (prevalencia de las fracturas de cadera y la cifosis y en los siguientes parámetros bioquímicos: concretamente ácido úrico, glucosa, HDL-colesterol, triglicéridos y fósforo). Estas diferencias desaparecieron tras realizar el ajuste por las variables que fueron incluidas en el modelo por la regresión logística lineal aplicada. Tras realizar el ajuste con el propensity score matching y con el modelo de regresión lineal finalmente obtenido, no se obtuvo una influencia de la lactancia materna en la densidad mineral ósea, en la prevalencia de osteoporosis densitométrica o en la aparición de fracturas por fragilidad después de la menopausia.  Conclusiones La lactancia materna no se asocia a mayores o menores valores de densidad mineral ósea, a la prevalencia de osteoporosis densitométrica ni a la presencia de fracturas por fragilidad.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Summary  Objetive Lifestyle and gynecological history appear to influence bone mineral metabolism. There are conflicting data on the possible effects of breastfeeding on the subsequent development of densitometric osteoporosis or the development of fragility fractures. The objective of this study was to assess these effects.  Material and methods Observational, cross-sectional, open study, carried out in 758 postmenopausal women who were classified into two groups, depending on whether they had breastfed their children or not. Data were collected on lifestyles, gynecological history and fragility fractures. They underwent a general analysis, with renal and hepatic function, lipids, ions, as well as biochemical markers of bone remodeling, parathyroid hormone (PTH) and vitamin D (25HCC). Bone mineral density (BMD) was determined in the lumbar spine and in the proximal extremity of the femur by dual Xray absorptiometry (DXA). Likewise, a quantitative ultrasound (QUS) measurement was performed on the calcaneus of the dominant foot. The raw data, after being compared by groups, were adjusted by applying the propensity score matching method, making a more precise comparison of the variables studied.  Results The results prior to the application of the propensity score were adjusted for age and body mass index (BMI), since in the baseline study there were significant differences in these variables between both groups (prevalence of hip fractures and kyphosis and in the following biochemical parameters: specifically uric acid, glucose, HDL-cholesterol, triglycerides and phosphorus). These differences disappeared after adjusting for the variables that were included in the model by the applied linear logistic regression. After adjusting with the propensity score matching and with the finally obtained linear regression model, no influence of breastfeeding was obtained on bone mineral density, on the prevalence of densitometric osteoporosis or on the appearance of fragility fractures after menopause.  Conclusions Breastfeeding is not associated with higher or lower bone mineral density values, the prevalence of densitometric osteoporosis, or the presence of fragility fractures.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[lactancia materna]]></kwd>
<kwd lng="es"><![CDATA[embarazo]]></kwd>
<kwd lng="es"><![CDATA[osteoporosis]]></kwd>
<kwd lng="es"><![CDATA[fracturas por fragilidad]]></kwd>
<kwd lng="es"><![CDATA[propensity score matching]]></kwd>
<kwd lng="es"><![CDATA[densidad ósea]]></kwd>
<kwd lng="en"><![CDATA[breastfeeding]]></kwd>
<kwd lng="en"><![CDATA[pregnancy]]></kwd>
<kwd lng="en"><![CDATA[osteoporosis]]></kwd>
<kwd lng="en"><![CDATA[fragility fractures]]></kwd>
<kwd lng="en"><![CDATA[propensity score matching]]></kwd>
<kwd lng="en"><![CDATA[bone density]]></kwd>
</kwd-group>
</article-meta>
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