The feasibility of using real world data as external control arms in oncology trials.

Before real world data (RWD)-derived external control arms (ECAs) can be applied in clinical trials within the field of oncology, it must be determined whether these ECAs can function as appropriate and reliable control arms. This review provides an overview of studies in which RWD-derived ECAs were constructed and compared to a randomized clinical trial (RCT) arm. RWD-derived ECAs had similar survival outcomes as the RCT arm of comparison in six of the eight included studies.