What is an "ongoing" clinical trial? An analysis of different sources revealed heterogeneous definitions of when a clinical trial starts and ends: a meta-research study.
Rafael Leite PachecoAna Luiza Cabrera MartimbiancoRachel RieraPublished in: Sao Paulo medical journal = Revista paulista de medicina (2023)
The concept of "ongoing clinical trials" lacks a transparent and homogeneous definition across relevant sources. A consensus on this concept is important to facilitate the evaluation of available evidence and conduct research synthesis. Further efforts are necessary to determine the best definition for the start and end of a clinical trial.