The methodological quality of 176,620 randomized controlled trials published between 1966 and 2018 reveals a positive trend but also an urgent need for improvement.

Many randomized controlled trials (RCTs) are biased and difficult to reproduce due to methodological flaws and poor reporting. There is increasing attention for responsible research practices and implementation of reporting guidelines, but whether these efforts have improved the methodological quality of RCTs (e.g., lower risk of bias) is unknown. We, therefore, mapped risk-of-bias trends over time in RCT publications in relation to journal and author characteristics. Meta-information of 176,620 RCTs published between 1966 and 2018 was extracted. The risk-of-bias probability (random sequence generation, allocation concealment, blinding of patients/personnel, and blinding of outcome assessment) was assessed using a risk-of-bias machine learning tool. This tool was simultaneously validated using 63,327 human risk-of-bias assessments obtained from 17,394 RCTs evaluated in the Cochrane Database of Systematic Reviews (CDSR). Moreover, RCT registration and CONSORT Statement reporting were assessed using automated searches. Publication characteristics included the number of authors, journal impact factor (JIF), and medical discipline. The annual number of published RCTs substantially increased over 4 decades, accompanied by increases in authors (5.2 to 7.8) and institutions (2.9 to 4.8). The risk of bias remained present in most RCTs but decreased over time for allocation concealment (63% to 51%), random sequence generation (57% to 36%), and blinding of outcome assessment (58% to 52%). Trial registration (37% to 47%) and the use of the CONSORT Statement (1% to 20%) also rapidly increased. In journals with a higher impact factor (>10), the risk of bias was consistently lower with higher levels of RCT registration and the use of the CONSORT Statement. Automated risk-of-bias predictions had accuracies above 70% for allocation concealment (70.7%), random sequence generation (72.1%), and blinding of patients/personnel (79.8%), but not for blinding of outcome assessment (62.7%). In conclusion, the likelihood of bias in RCTs has generally decreased over the last decades. This optimistic trend may be driven by increased knowledge augmented by mandatory trial registration and more stringent reporting guidelines and journal requirements. Nevertheless, relatively high probabilities of bias remain, particularly in journals with lower impact factors. This emphasizes that further improvement of RCT registration, conduct, and reporting is still urgently needed.

A Bibliometric Network Analysis of Coronavirus during the First Eight Months of COVID-19 in 2020.

The COVID-19 pandemic has affected all aspects of society. Researchers worldwide have been working to provide new solutions to and better understanding of this coronavirus. In this research, our goal was to perform a Bibliometric Network Analysis (BNA) to investigate the strategic themes, thematic evolution structure and trends of coronavirus during the first eight months of COVID-19 in the Web of Science (WoS) database in 2020. To do this, 14,802 articles were analyzed, with the support of the SciMAT software. This analysis highlights 24 themes, of which 11 of the more important ones were discussed in-depth. The thematic evolution structure shows how the themes are evolving over time, and the most developed and future trends of coronavirus with focus on COVID-19 were visually depicted. The results of the strategic diagram highlight 'CHLOROQUINE', 'ANXIETY', 'PREGNANCY' and 'ACUTE-RESPIRATORY-SYNDROME', among others, as the clusters with the highest number of associated citations. The thematic evolution. structure presented two thematic areas: "Damage prevention and containment of COVID-19" and "Comorbidities and diseases caused by COVID-19", which provides new perspectives and futures trends of the field. These results will form the basis for future research and guide decision-making in coronavirus focused on COVID-19 research and treatments.

Vitamina D, más allá de la homeostasis cálcica / Vitamin D beyond Calcium Homeostasis

RESUMEN Introducción: La vitamina D, considerada más que una vitamina, una prohormona, se le atribuye múltiples e importantes funciones que van más allá de la homeostasis cálcica. El creciente interés por la vitamina D está relacionado con el descubrimiento de sus receptores y de la expresión de la enzima 1α-hidroxilasa en diferentes tejidos del organismo. Esto ha generado la descripción de un gran número de efectos de la vitamina D en diferentes tejidos y en diversos procesos fisiológicos como: actividad antitumoral, reparación del ácido desoxirribonucleico (DNA), control de la apoptosis, estrés oxidativo, inmunomodulación, adhesión celular y metabolismo y otras funciones aún por esclarecer, y aunque los estudios no son concluyentes, los mismos proponen una relación entre niveles bajos de la vitamina y algunas enfermedades crónicas, autoinmunes y oncológicas. Objetivo: El propósito del presente artículo es describir las funciones extraesqueléticas de la vitamina D y su relación con algunas enfermedades a partir de información actualizada. Método: Se utilizó como buscador de información científica el Google Académico. Se revisaron 101 artículos provenientes de diferentes bases de datos: PubMed, SciELO y páginas web en general; de los cuales fueron referenciados 74 documentos. Conclusiones: Existe evidencia del efecto extraóseo de la hormona vitamina D, así como de la influencia biológica desfavorable de sus bajos niveles, sin embargo, no existe consenso relativo al efecto beneficioso de la suplementación con esta hormona(AU)

ABSTRACT Introduction: Vitamin D, considered, more than a vitamin, a prohormone, is attributed multiple and important functions beyond calcium homeostasis. The growing interest in vitamin D is related to the discovery of its receptors and the expression of the 1α-hydroxylase enzyme in different body tissues. This has generated the description of a large number of effects of vitamin D in different tissues and it involvement in various physiological processes such as antitumor activity, DNA repair, control of apoptosis, oxidative stress, immunomodulation, cell adhesion, and metabolism, as well as other functions still to be clarified; and, although studies are not conclusive, they suggest a relationship between low levels in the vitamin and some chronic, autoimmune and oncological diseases. Objective: The purpose of this article was to describe, based on updated information, the extraskeletal functions of vitamin D and its relationship with some diseases. Methods: Google Scholar was the search engine used to retrieve scientific information. We reviewed 101 articles from different databases, such as PubMed, SciElo, and web pages in general. Out of this number, 74 were chosen as referents. Conclusions: There is evidence about the extra-bone effect of the hormone known as vitamin D, as well as about the unfavorable biological influence of its low levels; however, there is no consensus regarding the beneficial effect of supplementation with this hormone(AU)

Posibilidades y limitaciones de la tele-estomatología / Possibilities and limitations of teledentistry

ABSTRACT Dental care is considered to be an example of complex manual interventions in the medical sector. The vision presented describes the organization of dental care based on the application of modern telecommunication technologies. In developed countries, general dental practitioners have a positive attitude toward incorporating teledentistry into their practice. In PubMed there is a tendency to increase the states by telehealth key words and tags, including teledentistry. Those health care tendencies show a steady trend toward the broadening of teledentistry services(AU)

RESUMEN El cuidado dental se considera un ejemplo de intervenciones manuales complejas en la industria médica. La visión presentada describe la organización de la atención dental basada en la aplicación de las modernas tecnologías de telecomunicación. En los países avanzados, los odontólogos generales tienen una actitud positiva ante la idea de introducir la teledentistería en su práctica. En PubMed hay una tendencia a aumentar los estados por las palabras clave y las etiquetas de la telesalud, incluida la teledentistería. Esas tendencias en materia de atención de la salud muestran una tendencia constante a la ampliación de los servicios de teledentistería(AU)

Bibliometría o altimetría: desde las métricas tradicionales a las actuales. Revisión bibliográfica / Bibliometry or altimetry: from traditional metrics to present. A review

Introducción:La forma en la que se mide la difusión de la información en la comunidad científica ha sufrido cambios en la última década. Objetivo:Esta revisión tiene como objetivo contextualizar al lector sobre las diferentes formas de medir el impacto de un artículo, tomando en cuenta el "sistema de medición tradicional" y el de "métricas alternativas". Metodología de búsqueda:Se realizó una búsqueda en las bases de datos "PubMed/MEDLINE", "Dialnet", "Scielo" y "ScienceDirect", utilizando las palabras clave: Bibliometría, alt métricas, métricas alternativas y factor de impacto. Conclusiones:El "sistema de medición tradicional", basado en el factor de impacto y que se apoya esencialmente en la opinión de expertos, con el fin asegurar la calidad de las investigaciones, es una herramienta aún vigente que en conjunto con las métricas alternativas o altmétricas, favorecen la difusión del conocimiento, sin que necesariamente midan de manera precisa la calidad del artículo y su impacto...(AU)

El futuro de la REMPSP y las plataformas O.A. El caso de SCIELO / No disponible

En este trabajo se describe la red de información científica iberoamericana SciELO que, con más de 20 años de recorrido, es una de las plataformas de impulso del acceso abierto a la información más reconocida

This work describes SCIELO, the Iberoamerican scientific information network that, after a journey of more than 20 years, is now one of the most acknowledged platforms promoting open access to informationa

Translating the Cochrane EMBASE RCT filter from the Ovid interface to Embase.com: a case study.

BACKGROUND: Information specialists frequently translate search filters from one interface to another. Publications advise that translation can be complex and should be undertaken carefully. OBJECTIVES: To investigate the issues arising when translating the Cochrane Embase RCT search filter from one interface (Ovid) to another (Embase.com). METHODS: We drafted a translation of the Cochrane Ovid RCT filter to run in Embase.com. We compared the line-by-line results of the Ovid filter with the results of the translation. We revised the filter. We identified differences between database versions including records with different publication years and subject headings. Some records were in Embase in one interface but not in the other. We encountered expected interface differences relating to proximity operators. We also encountered unexpected interface issues around truncation and the use of the original title or original abstract field. DISCUSSION: Filter conversion is challenging and time consuming revealing unexpected differences in interfaces and databases. Careful planning can pre-empt some issues, but others may only emerge during testing. We identified interface anomalies that have led database publishers to review aspects of the way their interfaces work. CONCLUSIONS: Translators should be vigilant for known and unknown differences in both interfaces and database versions.

Fundamentos históricos del diagnóstico y tratamiento de las hernias inguinales / Historical Foundations of Diagnosis and Treatment of Inguinal Hernias

RESUMEN Introducción: Es necesario conocer la historia de la cirugía, en general, y de la herniología, en particular, para poder comprender mejor los enormes avances experimentados en esas disciplinas. Muchas de las técnicas quirúrgicas modernas están basadas en los conocimientos y experiencias aportados por los primeros cirujanos, pero no fue hasta la divulgación de la obra del francés Eduardo Bassini, en 1889, que comenzó el impetuoso desarrollo de la cirugía de la hernia inguinal a escala mundial. Entre las más notables reparaciones de hernia inguinal, además de la de Bassini, se citan las de McVay, Halsted, Shouldice y la hernioplastia libre de tensión, popularizada por Lichtenstein. Objetivo: Profundizar en los aspectos cognoscitivos relacionados con los fundamentos históricos del diagnóstico y tratamiento de la hernia inguinal, su evolución y aplicación en la cirugía actual. Método: Revisión bibliográfica digital de publicaciones actualizadas en las bases de datos SciELO, Latindex, Elsevier, PubMed, Medline y Web of Science y Google Académico. Conclusiones: La cirugía de las hernias en general, y de las inguinales, en particular, nunca es rutina; debe ser individualizada a las características de cada enfermo y a los recursos disponibles. El futuro de la cirugía herniaria solo puede entenderse ligado al conocimiento de sus fundamentos históricos, del profundo dominio de la anatomía topográfica y de una esmerada técnica quirúrgica(AU)

ABSTRACT Introduction: It is necessary to know the history of surgery, in general, and herniology, in particular, in order to understand better the enormous advances experienced in these disciplines. Many of the modern surgical techniques are based on the knowledge and experiences contributed by the first surgeons, but it was not until the disclosure of the work of the French Eduardo Bassini, in 1889, that the impetuous development of inguinal hernia surgery began to scale worldwide. Among the most notable inguinal hernia repairs, in addition to that of Bassini, are those of McVay, Halsted, Shouldice and tension-free hernioplasty, popularized by Lichtenstein. Objective: To deepen the cognitive aspects related to the historical foundations of the diagnosis and treatment of inguinal hernia, its evolution and application in current surgery. Method: Digital bibliographic review of publications updated in the databases SciELO, Latindex, Elsevier, PubMed, Medline and Web of Science and Google Scholar. Conclusions: Surgery for hernias in general, and particularly for inguinal hernias is never routine. They must be individualized to the characteristics of each patient and the resources available. The future of hernia surgery can only be understood if it is associated with the knowledge of its historical foundations, the deep mastery of topographic anatomy and a careful surgical technique(AU)

Internacionalización y posicionamiento de las revistas españolas de psicología / International positioning of the spanish psychology journals

Se presentan los resultados del análisis de la difusión y circulación del número de revistas españolas en diferentes bases de datos, nacionales e internacionales. Para ello se realiza un estudio de las revistas que contienen las principales bases de datos bibliográficas hasta el año 2017. El aumento de la presencia de revistas españolas de psicología en las diferentes bases de datos es un indicador que determina el crecimiento y la madurez de esta disciplina y aporta una visión interesante de la actividad científica en psicología y su situación en el contexto internacional. Se muestra que las políticas de estado y las campañas de posicionamiento de universidades, asociaciones y colegios juegan un papel clave en la internacionalización y posicionamiento

We present the results of the analysis of the dissemination and circulation of the number of Spanish journals in different national and international databases. This is a study of the journals that contain the main bibliographic databases until the year 2017. The increase of the presence of Spanish psychology journals in the different databases is an indicator that determines the growth and maturity of this discipline and provides an interesting view of the scientific activity in psychology and its situation in the international context. It shows that state policies and positioning campaigns of universities, associations and schools play a key role in the internationalization and positioning

Developing a Cancer-Focused Library Survey - Assessing the Current Environment and Planning for the Future.

The primary goal of this project is to understand how each National Cancer Institute-designated cancer center library, and all libraries that support cancer research, function within their institutions. Through an in-depth survey focused on three major areas (staff, content and tools procurement, and user services), the research team hopes to determine how a cancer-centric library can be successful in supporting quality patient care, research excellence, and education. Additionally, the survey will examine the necessary minimum staffing levels for librarians and information professionals based on organizational size and degree of research focus. The survey will seek out the new skills librarians will need to deliver optimal services. The survey will also explore how content libraries purchase reflects and maps to constituents' current medical and research activities. Libraries within a research intense environment have a responsibility to align with researchers and health care professionals to provide resources and services that support their workflows. Cancer libraries need to be attuned to their institutions' missions, whether that includes excellent patient care, research endeavors, or cutting-edge educational programs. The information gathered from the survey will provide data for this research team to define the vision and standards of excellence for a cancer specialized research library.

Worldwide tendency and focused research in forensic anthropology: A bibliometric analysis of decade (2008-2017).

PURPOSE: The objective of this study was to illustrate the global research productivity and tendency of forensic anthropology in recent ten years (2008-2017) by bibliometric analysis. METHODS: "Forensic anthropology" was used as the Medical Subject Headings term and topic in PubMed and Web of Science Core Collection. RESULTS: As 5130 articles retrieved, two independent investigators evaluated all of them respectively. After restricting the published year, excluding duplicated and irrelevant articles, 1663 articles were available. The total of 219 countries and regions contributed to this research and the United States was the most productive country. There were 201 peer-reviewed journals including all of articles and two of them were identified as core journals according to Bradford's law. Eight of the top 10 productive authors were from developed countries. The top 10 cited articles were published by authors from developed countries with half in the United States. Sex estimation and age estimation were the most popular topics. CONCLUSIONS: With the basic and recognized methodology administered in this study, it provided a relative broad view to evaluate the scientific research capacity of forensic anthropology and reveal the worldwide tendency in this field.

Differences and similarities between Journal Impact Factor and CiteScore

Two major journal-based metrics are in competition: the Journal Impact Factor and CiteScore. Although these two metrics are based on similar principles of measuring the impact by citations, some differences between them exist. Years used to calculate the metric, access to computing data, and number of journals covered are some of these differences. One of the most relevant differences for pharmacy journals is the recognition in CiteScore of Pharmacy as an independent Subject Area, whereas it appears to have merged with pharmacology in the Journal Citation Reports. The immediate consequence of this differentiation is that pharmacy journals remain in the third and fourth quartiles in the Journal Impact Factor distribution, while a true quartile distribution exists in CiteScore

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Cartas al editor de procedencia peruana en revistas médicas indexadas en la base de datos Scopus / Letters to editor by Peruvian authors in medical journals indexed in Scopus Database

No disponible

Primeros pasos del área de rehabilitación de la Cochrane / First steps of the Cochrane rehabilitation field

No disponible

Métricas alternativas: más allá del factor de impacto / Altmetrics: Beyond the Impact Factor

No disponible

Historia de Revista de Osteoporosis y Metabolismo Mineral. Su situación diez años después / Background history of Revista de Osteoporosis y Metabolismo Mineral. The situation ten years on

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Posicionamiento y avance / Positioning and progress

No disponible

La plataforma Enferteca y su buscador Encuentr@, una biblioteca digital integrada de información enfermera / The Enferteca platform and its browser Encuentr@, an integrated digital library of Nursing information

El onceavo y último artículo de la serie «Puesta al día en la búsqueda de información científica» está dedicado a Enfermera y su buscador Encuentr@ del Grupo Paradigma. Enferteca es una plataforma que da acceso a la biblioteca digital del Grupo Paradigma y que abarca todos los temas y especialidades de Enfermería. Se trata de un recurso de suscripción que da acceso a monografías, atlas y diccionarios, manuales y temarios para oposiciones, así como a los contenidos de las revistas online desde 1998. Su buscador Encuentr@ permite localizar todos los documentos de este fondo editorial. El objetivo del presente artículo se centra en explicar el interés y contenidos de la plataforma Enferteca, especialmente a través del funcionamiento del buscador Encuentr@, mostrando las opciones de búsqueda (simple y avanzada), así como la recuperación y la presentación de los resultados (AU)

The eleventh and last article in the series «Update in the search for scientific information» deals with Enferteca and its browser Encuentr@ by the Paradigma Group. Enferteca is a platform that provides access to the digital library of the Paradigma Group, and includes all Nursing topics and specialties. This is a resource by subscription which provides access to monographs, atlases and dictionaries, manuals and course agendas for open competition exams, as well as to the contents on online journals published since 1998. Its browser Encuentr@ allows to locate all documents in their archives. The objective of this article focuses in explaining the interest and contents of the Enferteca platform, particularly through the performance of the Encuentr@ browser, showing the search options (simple and advanced), as well as the retrieval and presentation of results (AU)