I screened at Covance Daytona. My labs passed screening. Was told there was a lottery system for those who passed screening, and I had lost. I was wondering if this is a common practice. I would love to go to Daytona again but do not want to waste time and money if they recruit waaaay more subjects than they need. Worldwide in San Antonio is the worst with overscreening.
Every clinic screens FAR more people than they need to fill the study. Then they invite several more people to check-in than they need to fill the study. They need to have enough healthy subjects to fill the study and almost always someone will fail soing in the screening at check in so they need extra people. That's just part of the process. If everyone who checks in passes the screening then it's hard to decide who gets in. Some clinics will base it on screening , some on best labs, and others will first keep people that they know and trust.