What is an International Standard Randomised Controlled Trial Number (ISRCTN)?
A. The International Standard Randomised Controlled Trial Number (ISRCTN) is a simple numbering system for the unique identification of trials worldwide. Acting rather like the ISBN (International Standard Book Number) on the back of every book, it will simplify the identification of trials and provide a unique number that can be used to track all publications and reports resulting from each trial. Please let us know if you have any questions that you would like us to answer and then add to this section.