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Trials that turn from retrospectively registered to prospectively registered: A cohort study of retroactively prospective clinical trial registration using history data
Background.Prospective clinical trial registration is a methodological best practice, a moral requirement under the Declaration of Helsinki, and in many cases legally required. The US clinical trials register ClinicalTrials.gov allows for changes to a clinical trial registry entry at any time, including changes to the clinical trial start date, making it possible for a trial that was registered after the enrolment of the first patient (retrospective registration) to retroactively change itsdoi:10.1101/2022.10.25.22281505 fatcat:kn5yhkkdwbcsxdsfh2euo6zdte