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Higher Order Response-Adaptive Urn Designs for Clinical Trials with Highly Successful Treatments

Higher Order Response-Adaptive Urn Designs for Clinical Trials with Highly Successful Treatments

Summary We consider a problem of reducing the expected number of treatment failures in trials where the probability of response to treatment is close to 1 and treatments are compared on the basis of the log-odds ratio. We propose a new class of urn designs for randomization of patients in …