Analysis of completed US phase 3 clinical trials (n=5051) registered at ClinicalTrials.gov (first received: 01/01/2002 to 01/01/2014)

"The majority of US phase 3 trials were retrospectively registered. Only three out of ten studies that were completed before January 2011 have results available, data was submitted to ClinicalTrials.gov within12 months by 34% of the investigators." (1) Complete analysis: 1. Ramirez JH, Palacios M. Re: The US requirement to deposit trial data within a year is unworkable. March 17, 2014. URL: http://www.bmj.com/node/753103 This database complies with the terms and conditions of ClinicalTrials.gov (http://clinicaltrials.gov/ct2/about-site/terms-conditions) and the WHO ICTRP (http://www.who.int/ictrp/search/download/en/) for using downloaded data.