Xavier Serra-Aracil, Mireia Pascua-Sol, Jesus Badia-Closa, Salvador Navarro-Soto, Salvador Navarro Soto, Raquel Sánchez Santos, Luís Sabater Ortí, Manuel Pera Román, Victor Soria Aledo, Eduardo M. Targarona Soler, Xavier Serra Aracil, José Luis Ramos Rdriguez, María Socas Macías, Sergio Moreno, Ignacio Rey Simó, Sandra García Botella, Helena Vallverdú, Inés Rubio, Laura Armananzas, Ivan Arteaga, J.M. Miguelena, Vicenç Artigas Raventos, Enrique Mercader, Dieter Morales García, Monica Millan, María Dolores Frutos, Gonzalo de Castro, Manuel López Cano, Baltasar Pérez Saborido, and Itziar Larrañaga
Our main goal is to describe how to start and develop a multicenter, prospective, randomized, controlled trial. The first step is to have an idea that will become the hypothesis and a main objective. A bibliographic search should be done to check for clinical interest and originality. Moreover, the study must be feasible and should be finished within 4 years. In order to start the multicenter study, a protocol should be written (in accordance with the SPIRIT guidelines Standard Protocol items: Recommendations for Interventional Trials), including the design type, sample size and participating hospitals. Randomization is key to the design and, therefore, the CONSORT (Consolidated Standards of Reporting Trials) guidelines must be followed. However, if the study cannot be randomized, the TREND (Transparent Reporting of Evaluations with Non-Randomized Designs) guidelines are recommended. When the protocol is approved by the Ethics Committee for Clinical Investigation of the hospital, we ought to create visibility. It is suggested to register the trial on ClincalTrials.gov and submit its publication to indexed magazines. Financial resources are necessary to execute the study and maintain an online database. This allows the registry to be updated and accessible to all the participants in the study. What is more, randomization can be done immediately. And last, but not least, is motivation. Multicentricity equals to participation of all the chosen medical centers. Updating and motivating them by sending a newsletter every 1-3 months keeps participants engaged in the study.