Barriers to participationEntrenched systems
A drug company testing a new treatment in 2014 hired a contract research organization (CRO) to run the trial. The CRO contracted research sites to enroll patients and sent monitors to each site's premises to check quality and compliance SC2. Patients had to travel to the site for every visit in the study schedule, and only about 8% of patients were ever approached to join a trial, because most did not live near a participating site SC2 SC1. Each site ran its own operating procedures, and CROs had built their processes around those sites, which made a shift to visits at home or online a change in how the whole trial was run SC2 SC1.