Duplicate subjects exist in most clinical trials to varying degrees. CNS clinical trials are especially prone to duplicate subject or over enrollment. The issue exists from phase 1 healthy volunteer studies to multiple phase 2/3 clinical trials across many therapeutic indications. Use of global research subject database registry such as Verified Clinical Trials will help detect and prevent duplicate subjects at the time of screening. This saves the sites, sponsor and CRO time and money. The protections continue the entire duration of the study. The NIH has elected to work with Verified Clinical Trials to prevent duplicate subjects as have countless pharmaceutical sponsors across the world. When research sites cooperate to prevent duplicate subjects by using Verified Clinical Trials it helps the entire research community.
Verified Clinical Trials is the largest research subject database registry. There are over 18 preventable protocol deviations that Verified Clinical Trials will detect and protect.