Randomised controlled trials for the BMJ need to be registeredBMJ 2005; 331 doi: https://doi.org/10.1136/bmj.331.7510.219-a (Published 21 July 2005) Cite this as: BMJ 2005;331:219
If you are the author of a randomised controlled trial that begins enrolment of patients after 1 July 2005 you must register it in a public trials registry, at or before the start of enrolment, for it to be considered for publication in the BMJ. Trials that began patient enrolment on or before 1 July 2005 must be registered before 13 September 2005 to be considered for publication.
The BMJ's criteria for a suitable public trials registry are that it is free to access, searchable, and identifies trials with a unique number; that registration is free or at minimal cost; that registered information is validated; that registered entry includes details to identify the trial and investigator and includes the status of the trial; and that the research question, methods, intervention, funding, and sponsorship must all be disclosed.
When you submit your paper to the BMJ please state the registration number of the trial and the name of the trials registry in the last line of your paper's structured abstract.