Increasing trial efficiency by early reallocation of placebo nonresponders in sequential parallel comparison designs: application to antidepressant trials.

Abstract

BACKGROUND The sequential parallel comparison (SPC) design was proposed to improve the efficiency of psychiatric clinical trials by reducing the impact of placebo response. It consists of two consecutive placebo-controlled comparisons of which the second is only entered by placebo nonresponders from the first. Previous studies suggest that in antidepressant… (More)
DOI: 10.1177/1740774512456454

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