According to a study coordinated by Dr. Pilar Suñé, from the pharmacy service at Vall d'Hebron University Hospital (HUVH), published in PLOS One, the results of the clinical trials influence the rates of publication in the medical journals and in the time they need to be published. Nonetheless, the impact factor doesn't change compared to the negative clinical trials.Of the 785 clinical trials analyzed by this study and realized at HUVH, 48% was published. In the clinical trials with known results and classified as positive, the rate of publication was almost 85 per cent, whereas the rate of the negative clinical trials published was 69%. In the latter case, the not successful clinical trials were published by average one year later than the positive.Despite a bias of publication depending on the results, there has not been detected a trend of the best biomedical journals to reject the publications of clinical trials with negative results.More info: "http://dx.plos.org/10.1371/journal.pone.0054583" http://dx.plos.org/10.1371/journal.pone.0054583