Abstract

In planning trials, good practice requires prespecification of analyses to control the probability of false positives and to enable a coherent interpretation of the result. In reviewing trials, analyses are usually not preplanned. Although the goals of reviewers are neither the same as nor opposite to those of planners, reviews are also subject to concerns about multiple, post hoc analyses. The probability of false negatives is not controlled, and the multiple analyses can be difficult or impossible to interpret together coherently. We consider several types of multiplicity that arise in reviews rather than in submissions and offer advice for coping with them.

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