Explain double-blind and placebo-controlled

Reference no: EM13112609

The report of this study in the Journal of the American Medical Association describes it as a "double-blind, randomized, placebo-controlled factorial trial." "Factorial" means that the treatments are formed from more than one factor. What are the factors? What do "double-blind" and "placebo-controlled" mean?

Reference no: EM13112609

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