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Carta al Director
Respuesta de los autores
Authors' Reply
Albert Sánchez-Font
Corresponding author
ASanchezF@imas.imim.es

Autor para correspondencia.
, V.. Víctor Curull, Joaquim Gea
Servei de Pneumologia, Hospital del Mar, IMIM, Universitat Autònoma de Barcelona, Universitat Pompeu Fabra, CIBER de Enfermedades Respiratorias (CibeRes), Barcelona, España
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    "textoCompleto" => "<span class="elsevierStyleSections"><p class="elsevierStylePara elsevierViewall">Agradecemos la carta de Campillo-Soto et al referente a nuestro trabajo recientemente publicado en <span class="elsevierStyleSmallCaps">Archivos</span><span class="elsevierStyleSmallCaps">de</span><span class="elsevierStyleSmallCaps">Bronconeumolog&#237;a</span><a class="elsevierStyleCrossRef" href="#bib1"><span class="elsevierStyleSup">1</span></a>&#46; Estamos de acuerdo en sus apreciaciones acerca de las limitaciones metodol&#243;gicas de algunos estudios que reflejan dise&#241;os epidemiol&#243;gicos concretos&#44; y para los cuales hay gu&#237;as espec&#237;ficas sobre la redacci&#243;n del manuscrito &#40;v&#233;ase <a href="http://www.equator-network.org/">http&#58;&#47;&#47;www&#46;equator-network&#46;org&#47;</a>&#41;&#46; Sin embargo&#44; discrepamos de la interpretaci&#243;n que realizan sobre nuestro estudio&#46; En &#233;l no se analiza la &#8220;precisi&#243;n&#8221; diagn&#243;stica &#40;<span class="elsevierStyleItalic">diagnostic accuracy</span>&#41; de una t&#233;cnica&#44; sino su utilidad en la pr&#225;ctica cl&#237;nica&#46; Por ello&#44; la lista de comprobaci&#243;n STARD y las consideraciones que de ella se derivan no ser&#237;an aplicables en nuestro caso&#46;</p><p class="elsevierStylePara elsevierViewall">Una vez clarificado este punto&#44; no podemos dejar de mostrar nuestra sorpresa cuando afirman que &#8220;la sensibilidad y la especificidad carecen de utilidad pr&#225;ctica cl&#237;nica&#8221;&#46; Art&#237;culos publicados en revistas tan prestigiosas como <span class="elsevierStyleItalic">Chest</span> o <span class="elsevierStyleItalic">JAMA</span><a class="elsevierStyleCrossRefs" href="#bib2"><span class="elsevierStyleSup">2&#44;3</span></a> muestran la sensibilidad&#44; la especificidad y los valores predictivos de la ultrasonograf&#237;a endobronquial sin que&#44; hasta la fecha&#44; se haya cuestionado la validez de los resultados obtenidos mediante esta t&#233;cnica diagn&#243;stica&#46; Por otro lado&#44; queda demostrado en un interesante metaan&#225;lisis publicado en <span class="elsevierStyleItalic">Thorax</span> por Holty et al<a class="elsevierStyleCrossRef" href="#bib4"><span class="elsevierStyleSup">4</span></a> que la sensibilidad de la punci&#243;n aspirativa transbronquial depende de la prevalencia de infiltraci&#243;n tumoral en las adenopat&#237;as mediast&#237;nicas&#46; Como se&#241;alan Burgue&#241;o et al<a class="elsevierStyleCrossRef" href="#bib5"><span class="elsevierStyleSup">5</span></a>&#44; &#8220;cuando se afirma que la sensibilidad y la especificidad son independientes de la prevalencia se hace referencia a la prevalencia de enfermos en la muestra global a la que se aplica la prueba&#46; La sensibilidad s&#237; depende de la prevalencia de los distintos grados de la enfermedad en un grupo de pacientes&#8221;&#46; En nuestro caso&#44; esto hace referencia a la existencia o no de c&#225;ncer de pulm&#243;n&#46; Podemos recomendarles&#44; en este sentido&#44; la lectura de un interesante trabajo metodol&#243;gico de Brenner y Grefeller<a class="elsevierStyleCrossRef" href="#bib6"><span class="elsevierStyleSup">6</span></a>&#46;</p><p class="elsevierStylePara elsevierViewall">Finalmente&#44; el solapamiento de los intervalos de confianza no invalida&#44; como mencionan Campillo-Soto et al&#44; que una diferencia pueda ser estad&#237;sticamente significativa<a class="elsevierStyleCrossRef" href="#bib7"><span class="elsevierStyleSup">7</span></a>&#46; En nuestro estudio&#44; con un intervalo de confianza del 95&#37; el rendimiento de la punci&#243;n aspirativa transbronquial en las estaciones paratraqueales e hiliares fue del 19&#44;6 al 48&#44;7&#37; para la punci&#243;n convencional&#44; y del 45&#44;4 al 72&#44;9&#37; para la punci&#243;n guiada con ultrasonograf&#237;a endobronquial radial&#44; siendo la diferencia de estos resultados estad&#237;sticamente significativa&#46; Esto implica&#44; corroborando estudios anteriores realizados en otros pa&#237;ses&#44; que la segunda t&#233;cnica tiene probablemente una utilidad cl&#237;nica superior a la primera&#46;</p></span>"
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Article information
ISSN: 03002896
Original language: Spanish
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