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Factores de riesgo en la detección temprana del cáncer prostático
Get PDFIntroducción: El impacto del cáncer prostático en las próximas décadas será enorme y constituirá un problema sanitario mayor. A consecuencia de ello, en el mundo se han realizado diversos estudios enfocados a la detección temprana de este. Objetivo: Relacionar posibles factores de riesgo con el resultado de la biopsia prostática ecodirigida, en pacientes con diagnóstico de hiperplasia prostática benigna, para la detección temprana del cáncer prostático. Métodos: Estudio descriptivo, transversal. El universo fue de 359 pacientes y la muestra de 108 pacientes que dieron el consentimiento informado, en edades de 45 a 69 años, con antígeno prostático específico total 2,1-10 ng/mL y la velocidad del antígeno mayor o igual a 0,75 ng/mL/año. Se excluyeron los pacientes con criterio quirúrgico. Los factores de riesgo analizados fueron: la edad, color de la piel, obesidad, hábito de fumar y antecedente familiar de cáncer y se relacionaron con el resultado de la biopsia prostática ecodirigida. Resultados: Se notificaron 44 pacientes con cáncer, para un 40,7 %. Predominó el cáncer en las edades de 60 a 69 años (61,36 %), en personas de piel no blanca (72,73 %), que no eran obesos (63,64 %), en fumadores (45,45 %) y con antecedente familiar de primer grado de consanguinidad en el 65,91 %. Conclusiones: Las variables color de piel no blanca y antecedente familiar de primer grado de consanguinidad, tuvieron fuerte relación con el diagnóstico de cáncer. Se consideran factores de riesgos principales en la detección temprana del cáncer prostático
Densidad del antígeno prostático específico para la detección temprana del cáncer prostático / Density of the prostate specific antigen for the early detection of prostate cancer
Get PDFIntroducción: El cáncer prostático es uno de los problemas médicos más importantes en la población masculina. El diagnóstico tardío y la alta morbimortalidad hacen necesaria su detección temprana. Objetivo: Determinar la utilidad en el valor de corte de la densidad del antígeno prostático específico, en los pacientes con diagnóstico de hiperplasia prostática benigna, para la detección temprana de cáncer. Métodos: Estudio descriptivo transversal. Universo de 359 pacientes y la muestra 108. Fueron incluidos aquellos que dieron el consentimiento informado, de 45 a 69 años de edad, con diagnóstico clínico de hiperplasia prostática benigna, antígeno prostático específico 2,1-10 ng/mL y velocidad del antígeno mayor o igual a 0,75 ng/mL/año. Se excluyeron aquellos con criterio de tratamiento quirúrgico y se eliminaron los que no acudieron a citas médicas. Las variables estudiadas fueron: edad, motivo de consulta, resultado de la biopsia prostática, densidad del antígeno prostático y utilidad del valor de corte de la densidad. Resultados: Predominaron los pacientes de 60 y más años de edad (55,56 %) y los sintomáticos (75 %). Se diagnosticó el cáncer prostático al concomitar este con la hiperplasia prostática en el 40,3 %. En ellos prevaleció el rango de corte de la densidad mayor a 0,12 ng/mL/cc y en escala Gleason 6 (de mejor pronóstico). Conclusiones: El incremento del valor de corte de la densidad del antígeno prostático específico correspondió a mayor número de casos diagnosticados de cáncer prostático, lo que indica que en los pacientes con diagnóstico clínico de hiperplasia prostática benigna es de utilidad emplear la densidad del antígeno prostático específico para la detección temprana del cáncer prostático
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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