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AbstractThis article aims to contribute to the debate on audience participation in the media from three points of view: (1) demonstrating how data journalism enables an effective participation by the public in news production, (2) establishing a typology of the forms of contribution, and (3) performing an in-depth study of La Nación (Argentina), as an example of success in collaborative data projects carried out in Latin America. In order to achieve these objectives, firstly, all the Global Editors Network Data Journalism Awards were analysed with the purpose of detecting projects involving user-generated content. Secondly, La Nación was studied from an ethnographic perspective, as it is the medium with the most prizes in which citizen participation was detected. The results show that collaboration between media and audience can make large-scale journalism projects a reality, and also that citizens in Argentina are recruited by LN Data specially to boost political accountability.

El objetivo del estudio es analizar la escala CHADS2como marcador de riesgo de mortalidad en pacientes hipertensos, independientemente de la presencia o no de fibrilación auricular.

La puntuación CHADS2es una demostrada herramienta fundamental para identificar el riesgo cardioembólico, fundamentalmente el ictus, de pacientes con fibrilación auricular no valvular, con el propósito de indicar la terapia anticoagulante. El objetivo del presente estudio es analizar la utilidad de dicha puntuación para pacientes hipertensos sin fibrilación auricular conocida en una zona mediterránea.