The use of composite end points in clinical trials can expedite drug development and approval, and thus improve patient access to novel treatments, but are often vaguely and heterogeneously defined, with considerable inter-study variation in the component events that are included. The different component events can vary in clinical significance and be differentially affected by treatment but, nevertheless, are rarely reported separately. In this Perspective, Walia et al. define composite outcomes that are commonly used in oncology, discuss the advantages and challenges of using composite end points, and advocate for transparent reporting including a full breakdown of the component events to facilitate accurate interpretation of trial results and the true benefit of an intervention.
- Anushka Walia
- Jordan Tuia
- Vinay Prasad
