<?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>0124-0064</journal-id>
<journal-title><![CDATA[Revista de Salud Pública]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. salud pública]]></abbrev-journal-title>
<issn>0124-0064</issn>
<publisher>
<publisher-name><![CDATA[Instituto de Salud Publica, Facultad de Medicina - Universidad Nacional de Colombia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0124-00642017000500686</article-id>
<article-id pub-id-type="doi">10.15446/rsap.v19n5.60924</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Anchoring bias in face-to-face Time-Trade-Off valuations of health states]]></article-title>
<article-title xml:lang="es"><![CDATA[Sesgo de anclaje en valoraciones de estados de salud por Time Trade-Off]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Molina]]></surname>
<given-names><![CDATA[Mario]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chicaiza-Becerra]]></surname>
<given-names><![CDATA[Liliana A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional de Colombia  ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional de Colombia  ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>10</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>10</month>
<year>2017</year>
</pub-date>
<volume>19</volume>
<numero>5</numero>
<fpage>686</fpage>
<lpage>690</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0124-00642017000500686&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0124-00642017000500686&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0124-00642017000500686&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Objective To test whether anchoring (a cognitive bias) occurs during face-to-face interviews to value health states by Time-Trade-Off.  Methods 147 Colombian subjects (111 males, 36 females) valued five EQ-5D health states better than death during a face-to-face interview. Subjects were randomly assigned to two different starting points.  Results Shapiro-Wilk test discarded normality, while non-parametric tests, including Kolmogorov-Smirnov and Wilcoxon-Mann-Whitney, showed that anchoring was significant in four out of five health states. A higher starting point increased the elicited value by 15 %-188 %. The size of the anchoring effect was not uniform among health states.  Conclusion Anchoring effects may bias face-to-face Time Trade-Off valuations. The size of the anchoring effect is relevant enough for health policy.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Objetivos Comprobar si se presenta anclaje (un sesgo cognitivo) en las valoraciones de estados de salud por Time-Trade-Off realizadas en entrevistas en persona.  Métodos 147 sujetos colombianos (111 hombres, 36 mujeres) valoraron five estados de salud EQ-5D mejores que la muerte en una entrevista personal. Los sujetos se asignaron aleatoriamente a dos puntos de partida distintos.  Resultados El test de Shapiro-Wilk descartó normalidad de las distribuciones. Las pruebas no paramétricas de Kolmogorov-Smirnov y Wilconson-Mann-Whitney mostraron que el anclaje era significativo en cuatro de los cinco estados de salud. Un punto de partida más alto aumentaba el valor obtenido en un 15 %-188 %. El tamaño del anclaje no era uniforme en los distintos estados de salud.  Conclusiones El anclaje puede sesgar las valoraciones por Time Trade-Off realizadas en entrevistas. El efecto es lo suficientemente alto como para hacerlo relevante en términos de política.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Heuristics]]></kwd>
<kwd lng="en"><![CDATA[cost-benefit analysis]]></kwd>
<kwd lng="en"><![CDATA[outcome assessment (health care)]]></kwd>
<kwd lng="en"><![CDATA[observer variation]]></kwd>
<kwd lng="en"><![CDATA[bias]]></kwd>
<kwd lng="en"><![CDATA[methods (source: MeSH, NLM)]]></kwd>
<kwd lng="es"><![CDATA[Heurística]]></kwd>
<kwd lng="es"><![CDATA[análisis costo-beneficio]]></kwd>
<kwd lng="es"><![CDATA[evaluación de resultado]]></kwd>
<kwd lng="es"><![CDATA[variaciones dependientes del observador]]></kwd>
<kwd lng="es"><![CDATA[sesgo]]></kwd>
<kwd lng="es"><![CDATA[métodos (fuente: DeCS, BIREME)]]></kwd>
</kwd-group>
</article-meta>
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