Is Sharing Datasets the Answer to the New Challenges of Reproductive Biology Research?

Data sharing increases the speed of research and saves time and resources while ensuring transparency and reproducibility. We have analyzed this behavior through the reproductive biology community. Our study revealed that Q1 (44%) and Q2 (36%) JCR reproductive biology journals are the most active journals in data sharing.

Proper use of medical language: Main problems and solutions. / Utilización adecuada del lenguaje médico: principales problemas y soluciones.

Medical language should be characterized by its precision, emotional neutrality and stability. The effective communication of results of scientific studies depends on compliance with current standards of drafting and style; texts with defects can hinder interest in the findings. In this study, we discuss some of the most common problems and errors in medical language, including the abuse of abbreviations and foreign words, the use of improper words, syntax errors and solecisms, the most common errors in titles and the abuse of capital letters and the gerund. Investigators have effective tools for dealing with these problems, such as quality texts, critical dictionaries of questions and difficulties with the Spanish language and various drafting and style manuals.

[Open availability of articles and raw research data in Spanish pediatrics journals]. / Disponibilidad en abierto de los artículos y de los datos brutos de investigación en las revistas pediátricas españolas.

INTRODUCTION: The open Access to publications and the raw data allows its re-use and enhances the advancement of science. The aim of this paper is to identify these practices in Spanish pediatrics journals. METHOD: We reviewed the author's instructions in 13 Spanish pediatrics journals, identifying their open access and deposit policy. RESULTS: Eight journals allow open access without restriction, and 5 provide information on the ability to re-use and depositing data in repositories or websites. CONCLUSIONS: Most of the journals have open access, but do not promote the deposit of additional material or articles in repositories or websites.

[Co-authorship and collaboration networks in Spanish research into multiple sclerosis (1996-2010)]. / Coautoria y redes de colaboracion en la investigacion española sobre esclerosis multiple (1996-2010).

INTRODUCTION. Scientific collaboration is vital for to the advance of knowledge and is especially important in health sciences. The aim of this study is to identify scientific collaboration indicators and co-authorship networks of researchers and Spanish institutions that publish on multiple sclerosis (MS) during the period 1996-2010. MATERIALS AND METHODS. The analyzed papers were obtained from Web of Science and Scopus international databases, and IBECS and IME national databases, applying specific search profiles in each one of them. In order to identify collaboration networks all signed papers were quantified and co-authored measures were obtained, as the different indexes, degree, intermediation and closeness. RESULTS. 1,613 articles were published in the period 1996-2010, 92% of them in collaboration. With 10 or more works signed in collaboration, 20 Spanish research groups in MS were identified. 64.23% of the papers were published in collaboration between Spanish institutions, and 33.85% were in collaboration with foreign institutions. The institutional participation analysis has identified a large network of institutional partnerships that integrates 27 institutions, with the Hospital Vall d'Hebron in a central position. International collaboration is headed by the U.S. and European countries, most notably the UK and Italy. CONCLUSION. The most collaborative authors, institutions, and work groups in Spanish research in MS have been identified. Despite these indicators that characterize the collaboration in this area, it is necessary to enhance cooperation between them, since this collaboration is positively related to the quality and impact of research and publications.

TITLE: Coautoria y redes de colaboracion en la investigacion española sobre esclerosis multiple (1996-2010).Introduccion. La colaboracion cientifica es fundamental para el avance del conocimiento y es especialmente importante en ciencias de la salud. El objetivo de este trabajo es identificar los indicadores de colaboracion cientifica y las redes de coautoria de los investigadores e instituciones españolas que publican sobre esclerosis multiple (EM) durante el periodo 1996-2010. Materiales y metodos. Los trabajos objeto de estudio se han obtenido de las bases de datos internacionales Web of Science y Scopus, y nacionales IME e IBECS, aplicando perfiles de busqueda especificos en cada una de ellas. Se cuantificaron todos los trabajos firmados en coautoria y se obtuvieron como medidas del analisis estructural el grado, indice de intermediacion e indice de cercania. Resultados. Durante el periodo 1996-2010 se publicaron 1.613 articulos, de los que el 92% se realizo en colaboracion. Aplicando un umbral de 10 o mas trabajos firmados en colaboracion, se han identificado 20 grupos de investigacion españoles en EM. La mayor parte de los trabajos (64,23%) se ha publicado en colaboracion entre instituciones españolas, y el 33,85%, en colaboracion con extranjeras. El analisis de la participacion institucional ha permitido identificar un gran nucleo o red de relaciones de colaboracion institucional que integra 27 instituciones, en la que ocupa un lugar central el Hospital Vall d'Hebron. La colaboracion internacional esta encabezada por Estados Unidos y paises europeos como Reino Unido e Italia. Conclusion. A pesar de la bonanza de los indicadores de colaboracion que los caracterizan, es necesario potenciar la colaboracion entre autores, instituciones y grupos de trabajo, ya que esta se relaciona positivamente con la calidad e impacto de la investigacion y de las publicaciones medidos a traves de las citas.

[Analysis of the scientific productivity and impact of Spanish paediatrics (2006-2010)]. / Análisis de la productividad e impacto científico de la pediatría española (2006-2010).

INTRODUCTION: The aim of this paper is to quantify, by means of bibliometric indicators, the scientific production of Spanish researchers and institutions publishing in national and international paediatric journals, as well as multidisciplinary and other knowledge areas publications during the period 2006-2010, and to determine their impact. METHODS: The articles were obtained by applying specific search strategies in databases including, Science Citation Index-Expanded, Scopus, Índice Médico Español, and Índice Bibliográfico Español en Ciencias de la Salud. RESULTS: A total of 7971 articles were published in 971 journals, in which 142 were from Spain and 829 were international. The most productive journals were Anales DE PEDIATRÍA (n=1257), Acta Pediátrica Española (n=456) and Evidencias en Pediatría (n=358). Articles were published mostly in English (41.04%) and in Spanish (38.18%), with the participation of 17 874 different authors from 3302 institutions. Approximately 60% of the papers were cited at least once, and 39.81% were never cited. The mean number of citations per document was 4.28 (SD=9.54). The most cited journals were Pediatrics (n=770), Pediatric Infectious Disease Journal, and Journal of Clinical Endocrinology and Metabolism (n=553). DISCUSSION: The number of articles progressively increased from 2006 to 2010, which confirms the consolidation and growth of Spanish pediatric research, where the results are published in a wide range of Spanish and international journals, among which stands out is the ANALES DE PEDIATRÍA, the only Spanish pediatric journal with an impact factor. The increasing internationalization of Spanish Pediatrics is also confirmed, since a sustained growth of articles published in international journals is observed, where a quarter was published in US or British journals, as well as the importance of the publication in English. There is a concern about the fact that almost 40% of the articles did not receive a citation, which should encourage authors to complete research of quality, and editors to start editorial policies addressed to increase manuscript and journal quality.

[Co-authorship and Spanish pediatric scientific collaboration networks (2006-2010)]. / Coautoría y redes de colaboración científica de la pediatría española (2006-2010).

INTRODUCTION: Scientific collaboration is very important, as it is the basis of the scientific development of every discipline. The aim of this paper is to identify the indicators of scientific collaboration and co-authorship networks of Spanish researchers and institutions publishing in national and international paediatric, multidisciplinary or other knowledge areas journals during the period 2006-2010. METHODS: The papers studied were obtained from the databases including, Science Citation Index Expanded, Scopus, Índice Médico Español and Índice Bibliográfico Español en Ciencias de la Salud, by means of applying different search profiles. All the papers signed by co-authors were quantified in order to identify the authorship and institutional collaboration networks. Furthermore the degree, betweenness index, and closeness index were obtained as a measurement of the structural analysis. Co-authorships were represented graphically by the network analysis and display software Pajek. RESULTS: A total of 7971 articles were published during the period 2006-2010, with 90.55% completed in collaboration. Using a threshold of 10 or more co-authorships, 77 research groups in Pediatrics were identified. Most papers were published in collaboration between institutions of the same Autonomous Community (42.28%), and 14.84% with international collaboration. The analysis of institutional participation enabled a large nucleus or institutional collaboration network to be identified, with 52 linked institutions. International collaboration was led by the USA and European countries, such as United Kingdom, Germany and Italy. DISCUSSION: Authors, institutions and the most active working groups in Spanish pediatrics were identified, which is very interesting information to establish contacts to increase the existing networks, to prevent redundancies, and to take advantage of the new emerging groups. It is necessary to promote the collaboration of Spanish researchers, especially with their international colleagues, since a positive relationship is found between international collaboration and quality and impact of publications measured by citation analysis.

Eduardo Primo Yúfera, founder of Revista de Agroquímica y Tecnología de Alimentos and pioneer on food science and technology research in Spain.

Eduardo Primo Yúfera was the founder and director of the Instituto de Agroquímica y Tecnología de Alimentos (IATA, 1957-1974) until he was appointed president of the Consejo Superior de Investigaciones Científicas (CSIC). His aim to publicize food science led him to create the Revista de Agroquímica y Tecnología de Alimentos in 1961, the forerunner of this journal, Food Science and Technology International, which he directed until 1977. Of his scientific output, 50% has been published in this journal. He is considered to be the promoter and exponent of Food Science and Technology and Chemical Ecology in Spain as well as the instigator of the country's innovation model (R&D and innovation). In his work, he was able to combine basic research excellence and socially relevant applied research to move both science and society forward. He was an example and inspiration to many colleagues and followers. The aim of this study is to highlight the influence and importance of Primo Yúfera in the formation, development and consolidation of the journal Revista de Agroquímica y Tecnología de Alimentos, and to appraise his scientific contribution to this journal.

[Spanish paediatric research in ANALES DE PEDIATRÍA: research groups and research areas (2003-2009)]. / La investigación pediátrica española en ANALES DE PEDIATRÍA: grupos y ámbitos temáticos (2003-2009).

INTRODUCTION: Authorships of scientific papers are a significant milestone for researchers. Quantification of authors' contribution in research papers makes it possible to investigate patterns of research collaboration and interactions in scientific community. The objective of this paper is to analyse scientific collaboration and to identify research groups and research areas of ANALES DE PEDIATRÍA. MATERIAL AND METHODS: Papers published in ANALES DE PEDIATRÍA between 2003 and 2009 period were selected from Medline. An author name normalization process was carried out. Productivity and scientific collaboration indexes have been determined. Research groups have been identified through co-authorships networks analysis. Thematic areas of research and major domains of research groups have been characterised by means of quantification of Medical Subject Headings terms assigned to documents. RESULTS: An analysis was made of 1,828 documents published by 4,695 authors. The collaboration index (articles) was 5.3 ± 2.3. A total of 97 research groups consisting of between 2 and 80 researchers, which add up 415 researchers have been identified. The main diseases and medical signs studied were asthma (n = 35), multiple abnormalities (n = 28), premature diseases (n = 25), sepsis (n = 24), congenital heart defects (n = 23), respiratory insufficiency (n = 22), HIV infections (n = 21), streptococcal infections (n = 20) and gastroenteritis (n = 20). CONCLUSIONS: ANALES DE PEDIATRÍA is one of the most productive Spanish medical journals. Author's collaboration was similar to those observed in other Spanish clinical journals included in Journal Citation Reports. A remarkable number of paediatric research groups publishing on many topics have been identified.

Quality of life, needs, and interest among cocaine users: differences by cocaine use intensity and lifetime severity of addiction to cocaine.

We examined the quality of life (QoL) of 149 patients who were recruited in 2005 at outpatient treatment centers for cocaine dependence in Spain. Important life areas and life areas with potential need and interest to change in order to improve the QoL were analyzed in terms of patients? cocaine use intensity within the previous six months and lifetime severity addiction to cocaine. The Spanish versions of the Drug User Quality of Life Scale and the Lifetime Severity Index for Cocaine were used to measure QoL, needs and interest, and severity addiction to cocaine. The data analysis employed t-tests, linear regression, Mann?Whitney U tests, multivariate regression, and chi-square tests. Tailoring treatment programs to address the life areas that are considered relevant to cocaine users considering their intensity of consumption and lifetime severity addiction to cocaine may improve retention and treatment outcomes. Further research needs to consider patients of different ethnic backgrounds and cultural contexts. The study's limitations are noted.

[Approximation to the impact of biomedical journals in neurological sciences: study of bibliometric indicators in the Journal Citation Reports-Science Citation Index 2006]. / Aproximacion al 'impacto' de las revistas biomedicas en ciencias neurologicas: estudio de los indicadores bibliometricos en el Journal Citation Reports-Science Citation Index 2006.

INTRODUCTION: Neurological sciences form a multidisciplinary field that produces a wide range of scientific journals. The aim of this study was to perform a scientometric analysis of neurological science journals in the 2006 Journal Citation Reports-Science Citation Index (JCR-SCI) edition. MATERIALS AND METHODS: We study the three areas dedicated to neurological sciences (Neurosciences, Clinical Neurology and Neuroimaging) in the 2006 JCR-SCI edition. Bibliometric indicators used are: journals, articles, citations, impact factor (IF), immediacy index, half life and journals with the greatest IF in each specialty. We also perform a special analysis of Spanish neurological journals in JCR-SCI. RESULTS: In the area of Neurosciences we find a total of 200 journals, 27.157 articles, 1.109.784 citations and an average IF of 2,446, the greatest IF belonging to Annu Rev Neurosci (28,533) and Nat Rev Neurosci (23,054); Spanish journals: Neurocirugia and Acta Esp Psiquiatr. The area of Clinical Neurology contains 147 journals, 18.114 articles, 540.364 citations and an average IF of 1,848, the greatest IF belonging to Lancet Neurol (9,479) and Ann Neurol (8,051); Spanish journals: Neurologia and Rev Neurol. The area of Neuroimaging contains 13 journals, 1.747 articles, 49.210 citations and an average IF of 1,298, the greatest IF belonging to Neuroimage (5,559) and Hum Brain Mapp (4,888). CONCLUSIONS: We found out a broad representation of neurological journals from the 6,166 journals included in the 2006 JCR-SCI edition. Bibliometric characteristics differ in accordance to the clinical (Clinical Neurology) or experimental (Neurosciences) nature of the area. Even though bibliometric indicators for the four Spanish neurological journals have gradually improve over the previous 5 years, they are still proportionally ranked low in JCR-SCI. Due to significant limitations observed in the IF, we suggest conducting its analysis from a multidimensional bibliometric perspective, and always within its contextual research area.

[Risk of exposure to cross-transmission of infections in a dialysis unit: structural analysis of a simulated epidemic model]. / Riesgo de exposición a la transmisión cruzada de infecciones en una unidad de diálisis: análisis estructural de un modelo epidémico simulado.

UNLABELLED: Several studies show that cross-transmission of germs among patients under dialysis can occur as a consequence of processes in which the dialysis machine participates. The need of vascular access and lengthy periods of extracorporeal circulation increases the vulnerability to infection from nearby microorganisms. This study is intended to analyze the structural and dynamic features of the cross-transmission network generated by the propagation of germs which are capable of contaminating the hemodialyzers. METHODS: The simulation was carried out in a Dialysis Unit equipped with 19 machines for 62 patients. One of these patients was randomly chosen and considered as a carrier of an infectious agent capable of being transmitted to other patients, by means of the shared use of the same dialysis machine. For 10 days, the patient-machine allocation couples were registered. Co-occurrence matrices were elaborated and processed with the program UCINET 6.1 for social network analysis. Graphs were designed to visualize the networks of contagion, the centrality measures were calculated and the dynamic performance of the network generated by the chaining of the successive exposures of machines and patients was studied. RESULTS: The simulation let us visualize a rapid expansion of the risk of contagion of patients and contamination of machines. In 10 days, 87,09% of patients could have been exposed to the infection, and 68,42% of the machines could have been contaminated. These figures supposes that 5,4 new patients and 1,3 new machines could be potentially exposed every day. Along the first 5 days, the daily rate of exposure for patients and machines remains relatively low (3 new exposed patients and 1,2 new exposed machines every day). But the speed with witch the risk of contagion spreads, increases drastically in the last 5 days (7,8 new exposed patients every day). The fact that each patient requires at least 3 weekly sessions of dialysis and that a different machine can be allocated to him in each session explains that the risk of exposure can spread in some few days to a lot of patients and machines. It can also explain the difficulties found by the researches in identifying the responsible source of the origin of the sero-conversion outbreaks studied by the moment. CONCLUSIONS: If a germ can be transmitted from patient to patient by means of the incidental contamination of a dialysis machine, the appearance of an infected patient in a dialysis unit generates a risk of exposition that spreads quickly among other patients. Few days after an infected patient gets a dialysis session, it cannot be ruled out that most of the patients have been exposed to contagion and most of the machines exposed to contamination.

Gender analysis of papers published in ACTAS ESPANOLAS DE PSIQUIATRIA (1999-2006).

INTRODUCTION: The governments and organizations responsible for scientific policies try to encourage equality of gender, among their priorities that of obtaining equal participation and full integration of women in all aspects of the scientific profession. The study analyzes the scientific production of women in the areas of Psychiatry by means of the bibliometric study of the papers published in ACTAS ESPANOLAS DE PSIQUIATRIA. METHOD: A total of 458 papers published from 1999- 2006 period were downloaded from the Science Citation Index-Expanded database, these including original research papers, review articles and clinical cases. A bibliometric study broken down by gender was carried out to determine the existence or inequalities between men and women regarding scientific productivity, type of document, order of author signatures, on the institutional and geographical level. RESULTS: The papers were published by 1,194 different authors. The gender of 977 authors was identified, 587 (60.08%) men and 390 (39.92%) women. The percentage of women authorship has risen from 29.92% in 1999 to 38.86% in 2006. A total of 42.92% of authors having one published article were women, while <> (those with more than nine articles) only accounted for 33%. CONCLUSION: Bibliometric studies on scientific activity provide essential information to promote gender equality. An annual increase over 1% in the number of female authors in the journal has been observed, which if it continues will lead to a parity in coming years.

[Coauthorship networks and institutional collaboration in Revista de Neurología]. / Redes de coautoría y colaboración institucional en Revista de Neurología.

INTRODUCTION: Scientific cooperation is essential for the advance of science. Bibliometrics and social network analysis offer evaluation indicators to analyse collaboration in scientific papers. The aim of this study is to characterize scientific collaboration patterns in Revista de Neurología between 2002 and 2006. MATERIALS AND METHODS: Coauthorships and institutional relationships of papers published in Revista de Neurología have been identified. Collaboration Index, the most productive authors' and institutional collaboration patterns and the types of institutional collaborations have been quantified. Also, it has been constructed the coauthorship networks and the institutional collaboration network. Networks have been identified and represented using Access and Pajek software tools. RESULTS: The Collaboration Index was 4.01. 56.54% of papers involved institutional collaboration. The collaboration between institutions of the same country prevails (52.7%), followed by collaborations between departments, services or units of the same institution (40.47%) and international collaboration (6.83%). 45 coauthorship networks involving 149 investigators with a high intensity of collaboration and a large institutional network involved 80 centres were observed. CONCLUSIONS: Revista de Neurología covers scientific production of a high number of research groups. It has been observed a positive evolution in the collaboration patterns over the time. Nevertheless, it is essential to encourage inter-regional and international collaboration.

[Coauthorship networks and institutional collaboration in Farmacia Hospitalaria]. / Redes de coautorías y colaboración institucional en Farmacia Hospitalaria.

BACKGROUND: Scientific collaboration is necessary for the advance of science. The purpose of this study is to analyse collaboration between authors and Spanish institutions in scientific studies published in Farmacia Hospitalaria, applying methodology derived from the analysis of social networks. METHODOLOGY: The study identified pairs of authors and institutions co-authoring or co-signing the same works published in Farmacia Hospitalaria between 1998 and 2007, building collaboration networks using the TextToPajek and Networks-PAJEK programs. RESULTS: 448 articles were analysed, showing an average signature/ article index of 4.79. Applying a collaboration threshold of 3 articles, 26 clusters were formed with principal researchers being Jiménez Torres and Pérez Ruixo (n=16 co-authorships) and Ribas Sala and Codina Jané (n=15). Among the institutions, there was significant collaboration between the Complejo Hospitalario Virgen del Rocío and the Complejo Hospitalario Nuestra Señora del Valme (n=4), both in Seville, and between Hospitals Vall d'Hebrón (Barcelona), the Hospital de Navarra, and the Universitat de Barcelona (n=4). DISCUSSION: Analysis of the collaboration networks in Farmacia Hospitalaria has made it possible to identify the groups of authors and institutions in the area, as well as their relationships in terms of research and scientific publications. We propose to analyse the changes in these groups over a period of time, as well as to identify collaboration patterns in other national and international journals.

Consumption of anabolic steroids in sport, physical activity and as a drug of abuse: an analysis of the scientific literature and areas of research.

OBJECTIVE: The consumption of anabolic steroids (AS) has been growing continuously in recent years. It has gone beyond the sports world; AS are now widely used as drugs of abuse in connection with bodybuilding. This study sets out to assess the state of scientific research in the area. DESIGN: Bibliometrics were employed to evaluate the literature retrieved from the principal relevant bibliographic databases: MEDLINE, SportDiscus, the Science Citation Index Expanded and the Social Sciences Citation Index. The core journals were identified along with the leading authors and research groups and their institutional affiliations. Techniques based on social network analysis were applied in order to build up a concept map of research. RESULTS: 1325 documents were retrieved. They were produced by 3131 different researchers giving a Collaboration Index of 3.32. The institutions with the most productive authors were Ball State University (Muncie, IN, USA), the Ecole Nationale Vétérinaire de Nantes (ENVN), the Institut Municipal dInvestigació Mèdica (IMIM) (Barcelona, Spain), the Institute of Biochemistry of the German Sport University Cologne (DSHS), Iowa State University, Maastricht University and the University of Iowa. CONCLUSIONS: It was concluded that there has been an upward trend in the number of research projects. The sources used complemented one another, as 78.04% of the documents retrieved were unique to one source. The productivity ranking was headed by sports medicine journals, followed by journals of chemistry, physiology, endocrinology and substance abuse. Besides sporting activities, the most important research clusters were those connected with bodybuilding and with youth groups.

[Analysis of citations and national and international impact factor of Farmacia Hospitalaria (2001-2005)]. / Análisis de citas y factor de impacto nacional e internacional de Famacia Hospitalaria (2001-2005).

OBJECTIVE: The objective of this study is to analyse the citation patterns and impact and immediacy indicators of the Farmacia Hospitalaria journal during the period 2001-2005. METHOD: An analysis of citations chosen from 101 Spanish health science journals was carried out in order to determine the citing and cited journals and the national and international impact and immediacy indicators. A similar methodology used by Thomson ISI in Science Citation Index (SCI) and Journal Citation Reports (JRC) was applied. RESULTS: Farmacia Hospitalaria made 1,370 citations to 316 different journals. The percentage of self-citations was 9%. The national impact factor increased from 0.178 points in 2001 to 0.663 points in 2005 while the international impact factor increased from 0.178 to 0.806 for the same period. CONCLUSIONS: The analysis of citation patterns demonstrates the multidisciplinary nature of Farmacia Hospitalaria and a significant growth in the impact indicators over recent years. These indicators are higher than those of some other pharmacy journals included in Journal Citation Reports. Self-citation was not excessive and was similar to that of other journals.

Evaluation of formal quality of Spanish psychiatry journals.

INTRODUCTION: Standardization of scientific journals is a fundamental factor for a successful scientific communication, since it has repercussions on the role accomplishment of journals as research dissemination agents and expressive and representative channels of the different scientific communities. MATERIAL AND METHODS: The formal characteristics of the seven psychiatric journals included in the IME (Spanish Medical Index) database in 2006 were evaluated. A specific form was designed to evaluate the 64 different characteristics of each journal, based on the IME qualitative criteria for being included. RESULTS: Journals having the highest overall scores were Actas Españolas de Psiquiatría with 68/82 points, followed by European Journal of Psychiatry (65/82 points), Anales de Psiquiatría (58/82 points), Psiquiatría Biológica (57/82 points) and Informaciones Psiquiátricas (45/82 points). CONCLUSIONS: Spanish psychiatric journals fulfill most of the requirements, although some of them could be improved, such as failures in the regularity of the publication, the English presentation of the abstracts and the paper typology specification, indication of the reception and acceptance date and lack of a clear description of the publishing process for the selection of the manuscripts and peer review.

[Gender analysis of papers published in Revista de Neurología (2002-2006)]. / Análisis de género de los artículos publicados en Revista de Neurología durante el quinquenio 2002-2006.

INTRODUCTION: There is an ongoing interest in the society in promoting gender equality and in women integration in research activities. The purpose of this work is to identify from a gender perspective the bibliometric characteristics of articles published in Revista de Neurología journal during the 2002-2006 period. MATERIALS AND METHODS: Records were obtained from Science Citation Index database of ISI-Thomson platform. The following indicators were determined, disaggregated by gender: year of publication, type of document, number and order of signatures, number of collaborators, signature/papers index and in the institutional and geographical level. RESULTS: 4527 authors were identified, 2614 (57.74%) men and 1913 (42.,26%) women. The highest women's participation took place in original articles (39.01% of signatures). 44.5% of authors with one published article were women, while 'big women producers' (those with more than 9 articles) only were 16.67%. A greater productivity in men and a greater rate of collaboration in women has been detected. CONCLUSIONS: Scientific activity studies disaggregated by gender give an essential information in order to establish the basis of a scientific policy for promoting the woman as researcher. The evolution in the number of female authors in Revista de Neurología journal does not present an aiming growth to reach the parity in the next years. A low presence of women in positions of high productivity has been detected, whose causes should be identified.