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The analysis of productivity and disciplinary collaboration patterns for Spanish published scientific research in the field of Substance Abuse (2001-2005).From institutional affiliations we identified and quantified disciplinary participation in papers indexed in the IME/Indice Medico Español, ISOC/Indice Español de Ciencias Sociales y Humanidades, SCI-Expanded/Science Citation Index-Expanded and SSCI/Social Sciences Citation Index databases.A total of 31 disciplines and specialities were identified in ISOC, with 8.6% of documents in collaboration between them; 55 medical specialities were identified in IME, with 10.89% of documents in collaboration between them; and 62 specialities were identified in SCI-Expanded, with 41.68% of documents in collaboration between them.a) Substance Abuse, Psychology, Psychiatry, Epidemiology-Preventive Medicine and Public Health and Pharmacology are the disciplines and specialities that present the highest productivity. To these can be added, in papers published in foreign journals, specialities such as Biochemistry-Molecular Biology, Neurology and Neuroscience; b) Papers published in Spanish journals indexed in SCI-Expanded and in papers published in foreign journals present much higher collaboration indexes between disciplines and specialities; c) The main collaborations between specialities are those between Substance Abuse, Psychiatry and Psychology. To these can be added, in the case of journals indexed in SCI-Expanded, those between these specialities and Pharmacology, Neurology and Neuroscience.

Concern for encouraging gender equality makes it one of the high priority spheres of action for governments and organisations responsible for instigating scientific policies, with particular importance being placed on including the gender variable in evaluative analyses of scientific and technological activity. A comparative study was made, broken down by gender, of the scientific output of Spanish researchers with a high production in the field of substance abuse.We identified the gender of 338 authors who had published more than four different articles during the period from 1999-2004 and which were indexed in the IME/Indice Médico Español and the SCI/Science Citation Index databases, making a comparative analysis of their output and collaboration patterns, based on the gender variable.In the area of substance abuse, of those with the highest output (9 papers), 70% were men compared with 30% women. Among the average producers (5-9 papers), 57% of the authors identified were men and 43% women. Statistically significant differences were observed between men and women with the highest output with regard to the number of published works and those with whom they had collaborated.There is no gender equality in the area of substance abuse, particularly when considering the top researchers. It is essential to make in-depth studies that evaluate scientific output, broken down by gender, in order to adopt the necessary corrective measures to eliminate the disparity between men and women.

Objetivos: Se analiza la productividad y colaboracion de disciplinas y especialidades en el area del Abuso de Sustancias en las publicaciones cientificas firmadas por instituciones espanolas (2001-2005). Metodologia: A partir de las afiliaciones institucionales, en las que se hace constar habitualmente el departamento, servicio o unidad, se ha identificado y cuantificado la participacion de las diferentes areas del conocimiento en los trabajos recogidos en las bases de datos IME/Indice Medico Espanol, ISOC/Indice Espanol de Ciencias Sociales y Humanidades, SCI-Expanded/Science Citation Index-Expanded y SSCI/Social Sciences Citation Index. Resultados: En ISOC se han identificado 31 disciplinas y especialidades, con un 8,6% de documentos en colaboracion entre las mismas. En IME 55 especialidades medicas, con un 10,89% de documentos en colaboracion y en SCI-Expanded 62 especialidades y un 41,68% de documentos en colaboracion. Conclusiones: a) El Abuso de Sustancias, Psicologia, Psiquiatria, Epidemiologia-Medicina Preventiva y Salud Publica y Farmacologia son las disciplinas y especialidades que presentan el mayor indice de productividad, a las que se suman, en el caso de los trabajos publicados en revistas extranjeras Bioquimica-Biologia Molecular, Neurologia y Neurociencia; b) los trabajos publicados en las revistas espanolas recogidas en SCI-Expanded y en revistas extranjeras presentan indices de colaboracion entre disciplinas mucho mas elevados; c) las principales colaboraciones son las establecidas entre Abuso de Sustancias, Psiquiatria y Psicologia, a las que se suman, en el caso de las revistas recogidas en SCI-Expanded las colaboraciones que establecen estas disciplinas con la Farmacologia, Neurologia y Neurociencia.

Correspondencia a Juan Carlos Valderrama Zurián:Juan.Valderrama@uv.es Fundamento y objetivo: La preocupación por favorecer la igualdad de género constituye uno de los ámbitos prioritarios objeto de atención por parte de los gobiernos y los organismos gestores de las políticas científicas, destacándose la importancia de incluir la variable del sexo en los análisis evaluativos de la actividad científica y tecnológica. Se realiza un estudio comparativo desagregado por sexos de la producción científica de los investigadores españoles de elevada productividad en el área de las drogodependencias. Material y método: Se ha identificado el sexo de los 338 autores que han publicado más de cuatro artículos distintos durante el período 1999-2004 indexados en las bases de datos IME/Índice Médico Español y SCI/Science Citation Index, analizando comparativamente su productividad y patrones de colaboración considerando la variable sexo. Resultados: Entre los grandes productores (> 9 trabajos) del ámbito de las drogodependencias predominan los hombres (70%) frente a las mujeres (30%). Entre los productores moderados (5-9 trabajos), el 57% de los autores identificados fueron hombres frente a un 43% de mujeres. Se han observado diferencias estadísticamente significativas entre hombres y mujeres en los grandes productores en cuanto al número de trabajos publicados y personas con las que han colaborado. Conclusiones: En el área de las drogodependencias no existe una igualdad de género, especialmente cuando se considera la élite de la investigación. Resulta fundamental profundizar en estudios que evalúen de forma desagregada por sexos la productividad científica para acometer las medidas correctoras necesarias que permitan alcanzar la igualdad de género. Background and objective: Concern for encouraging gender equality makes it one of the high priority spheres of action for governments and organisations responsible for instigating scientific policies, with particular importance being placed on including the gender variable in evaluative analyses of scientific and technological activity. A comparative study was made, broken down by gender, of the scientific output of Spanish researchers with a high production in the field of substance abuse. Material and method: We identified the gender of 338 authors who had published more than four different articles during the period from 1999-2004 and which were indexed in the IME/Índice Médico Español and the SCI/Science Citation Index databases, making a comparative analysis of their output and collaboration patterns, based on the gender variable. Results: In the area of substance abuse, of those with the highest output (> 9 papers), 70% were men compared with 30% women. Among the average producers (5-9 papers), 57% of the authors identified were men and 43% women. Statistically significant differences were observed between men and women with the highest output with regard to the number of published works and those with whom they had collaborated. Conclusions: There is no gender equality in the area of substance abuse, particularly when considering the top researchers. It is essential to make in-depth studies that evaluate scientific output, broken down by gender, in order to adopt the necessary corrective measures to eliminate the disparity between men and women.