Imbalanced Randomization in Vaccine Clinical Safety Trials

Clinical safety and immunogenicity data in vaccines are commonly dichotomized into responder and nonresponder binary data. This article expands upon Fagerland, Lyndersen, and Laake to further study Newcombe's hybrid score and Fisher's conditional exact test using imbalanced randomization in vaccine clinical studies. The intent of this article is to study a potential statistical issue in clinical study design and analysis; hence, no reference to any particular product is made.