triple-blind studyA study in which knowledge of the treatment assignment(s) is concealed from the people who organise and analyse the data of a study as well as from subjects and investigators.
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triple-blinded studyClinical therapeutics A study in which the Pts and researchers are unaware of whether a treatment–experimental drug or placebo is being administered–ie, 'double-blinded'; in addition, the team analyzing the data is unaware of which group's data they are evaluating–ie, from the protocol's placebo or treatment arm. See Blinding, Double blinding.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.