Randomized controlled trials (RCTs) in ClinicalTrials.gov with missing data in the registration fields of 9 WHO Minimum Data Set items at initial registration and at last change before publication date, and differences of published data to those specified in the trial registration.

*WHO Minimum Data Set items relevant for publication and assessment of trial quality. Other 11 items were either general or administrative information, recorded only in the recruitment period and not routinely published in a journal article.
†29 trials had a single registration entry before publication.
‡Difference from the last change in the registration for RCTs with more than 1 registration change or difference from the first registration data for RCTs with a single registration entry (no change in the registration).