blind study

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blind stud·y

a study in which the observer is unaware of which individuals or group is subject to the treatment or procedure variables.
See also: blind test.
Synonym(s): blind test
Farlex Partner Medical Dictionary © Farlex 2012
Clinical research A trial in which participants—the subject or the investigator (or both)—are unaware as to whether they are in the experimental or control arm of the study
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
References in periodicals archive ?
Bristol-Myers Squibb, a United States-based pharmaceutical company, has revealed results from a Phase three randomised, double blind study of Yervoy (ipilimumab) 10 mg/kg (n=475), it was reported yesterday.
The Phase III double blind study involved 808 people with HER2-positive mBC, which recurred after prior therapy in the adjuvant or neoadjuvant setting.
Instead of using a retrospective (historical controls) study, they used a prospective, randomized, double blind study. Such a research design protects against "conscious or unconscious bias on the part of investigators," the researchers say.