Blinded Clinical Study Masked Clinical Study A study in which the subject, the investigator, or anyone assessing the outcome is unaware of the treatment assignment(s). NOTE: Blinding is used to reduce the potential for bias. [Modified ICH E6 Glossary] See also blinding/masking, double-blind study, single-blind study, triple-blind study; contrast with open-label or unblinded study. A clinical study that is designed using a procedure in which one or more parties to the study [subject(s), investigator(s), monitor, or/and data analyst(s)] are kept unaware of the treatment assignment(s). A type of study in which the patients (single-blinded) or the patients and their doctors (double-blinded) do not know which drug or treatment is being given. The opposite of a blinded study is an open label study. Blinded Clinical Study blinded study C2347038 Research Activity Blinded_Clinical_Study C70840 Blinded Clinical Study Blinded Clinical Trial Blind Clinical Study CDISC-GLOSS Interventional Study