<?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>1657-9534</journal-id>
<journal-title><![CDATA[Colombia Médica]]></journal-title>
<abbrev-journal-title><![CDATA[Colomb. Med.]]></abbrev-journal-title>
<issn>1657-9534</issn>
<publisher>
<publisher-name><![CDATA[Universidad del Valle]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1657-95342017000400161</article-id>
<article-id pub-id-type="doi">10.25100/cm.v43i4.2983</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[17-hydroxiprogesterone values in healthy preterm infants]]></article-title>
<article-title xml:lang="es"><![CDATA[Valores de 17-hidroxiprogesterona en recién nacidos prematuros sanos]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mendoza-Rojas]]></surname>
<given-names><![CDATA[Víctor Clemente]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Díaz-Martínez]]></surname>
<given-names><![CDATA[Luis Alfonso]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mantilla-Mora]]></surname>
<given-names><![CDATA[Gerardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Contreras-García]]></surname>
<given-names><![CDATA[Gustavo Adolfo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mora-Bautista]]></surname>
<given-names><![CDATA[Víctor Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez-Paredes]]></surname>
<given-names><![CDATA[Jhon Freddy]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Calderón-Rojas]]></surname>
<given-names><![CDATA[Alba Luz]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gómez-Tarazona]]></surname>
<given-names><![CDATA[Carlos Augusto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pinzón-Mantilla]]></surname>
<given-names><![CDATA[Katherine]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Industrial de Santander Facultad de Salud Escuela de Medicina]]></institution>
<addr-line><![CDATA[Bucaramanga ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Industrial de Santander Escuela de Medicina Departamento de Pediatría]]></institution>
<addr-line><![CDATA[Bucaramanga ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Industrial de Santander Facultad de Salud Escuela de Medicina]]></institution>
<addr-line><![CDATA[Bucaramanga ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Industrial de Santander Escuela de Microbiología Programa de Microbiología y Bioanálisis]]></institution>
<addr-line><![CDATA[Bucaramanga ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2017</year>
</pub-date>
<volume>48</volume>
<numero>4</numero>
<fpage>161</fpage>
<lpage>166</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S1657-95342017000400161&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S1657-95342017000400161&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S1657-95342017000400161&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction: In preterm newborn, problems with the interpretation of 17-OHP may occur.  Objective: Evaluate 17-OHP values in healthy preterm newborns until they reach the corrected gestational age.  Methods: Longitudinal study of 36 preterm infants with 17-OHP evaluation using ELISA from heel blood from 3 to 5 days and thereafter every 2 weeks until the corrected gestational age. Values adjusting multiple variables such as gestational age, birth weight and sex, among others were compared. The results were analyzed against 82 healthy full-term infants.  Results: In the first week of life, early term infants born within less than 34 months of gestational age show 17-OHP values that are much higher than the full term neonates. After a week, the values decrease and stabilize, but are still higher than those of full term neonates and remain so even at the corrected gestational age. (average difference of 63.0%, CI 95%: 11.8%-115.5%). 33.6% (41 samples) of a total of 122 samples taken from preterm infants were higher than 30 ng/mL.  Conclusions: 17-OHP values in early term infants are higher than those in full term neonates and can be related to postnatal adaptive processes. It is suggested that a second screening at the 37th week of corrected age be performed.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción:  En recién nacidos pretérmino se presentan problemas para interpretar la 17-OHP.  Objetivo:  Evaluar los valores de 17-OHP en recién nacidos sanos pretérmino hasta cuando alcanzan el término de edad gestacional corregida.  Métodos:  Estudio longitudinal de 36 prematuros con evaluación de la 17-OHP por ELISA en sangre de talón desde los 3-5 días de vida y luego cada dos semanas hasta la edad gestacional de término corregida. Se comparó los valores ajustando múltiples variables como edad gestacional, peso al nacer y sexo, entre otras. Se analizaron los resultados frente a los de 82 recién nacidos a término sanos.  Resultados:  En la primera semana de vida, los prematuros menores de 34 semanas de edad gestacional tienen valores de 17-OHP muy superiores a los neonatos de término. Al alcanzar la semana 34 de edad gestacional corregida, los valores descienden y se mantienen estables, siempre mayores a los de término, incluso al llegar a edad a término corregida (diferencia promedio de 63.0%, IC 95%: 11.8%-115.5%). El 33.6% (41 muestras) de un total de 122 muestras hechas en los prematuros eran mayores de 30 ng/mL.  Conclusiones:  Los valores de 17-OHP en recién nacidos pretérmino son más altos que en neonatos a término, pudiendo ser relacionado con los procesos adaptativos postnatales. Se sugiere realizar un segundo tamizaje al llegar a la semana 37 de edad corregida.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Neonatal screening]]></kwd>
<kwd lng="en"><![CDATA[17-alpha-Hidroxiprogesterone]]></kwd>
<kwd lng="en"><![CDATA[Adrenal Hyperplasia Congenital]]></kwd>
<kwd lng="es"><![CDATA[tamizaje neonatal]]></kwd>
<kwd lng="es"><![CDATA[17-hidroxiprogesterona]]></kwd>
<kwd lng="es"><![CDATA[hiperplasia adrenal congénita]]></kwd>
</kwd-group>
</article-meta>
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