Characterizing the patient experience: The role of patient‑reported outcomes 

Biological endpoints are essential, but on their own, they cannot tell the full story. To truly understand the value of a treatment and care surrounding it, we must also seek to understand how patients and carers experience it. This is where patient-reported outcomes (PROs) and observer‑reported outcomes (reflecting the perspectives of non-clinical caregivers) are becoming more prominent in clinical research.