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What is a run-in phase?

  • Andrea Cipriani (a1) and John R. Geddes (a2)


Run-in periods are frequently used when designing a clinical trial. In this paper we analysed the implications of runin periods for interpreting the results of clinical trials and applying these results in clinical practice. Study reports should indicate in details how run-in periods were carried out.


Corresponding author

Address for correspondence: Dr. A. Cipriani, Department of Medicine and Public Health, Section of Psychiatry and Clinical Psychology, University of Verona, Piazzale L.A. Scuro 10, 37134 Verona (Italy). Fax: +39-045-8027498 Email:


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