run-in period


Also found in: Wikipedia.

run-in period

the elapsed time before a trial is commenced when no treatment is given to participants in the study.
Farlex Partner Medical Dictionary © Farlex 2012

run-in period

The period before a clinical trial is begun when no treatment is given. The run-in period can be called a washout period if treatments that participants were using before entering the trial are discontinued.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.