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The design and interpretation of randomized trials is intimately connected to the use of "placebo". The nature and magnitude of placebo effects, however, is very poorly understood. This study will assess and compare placebo effects and physician interaction effects within a community-acquired common cold model. The goal of this study is to assess two kinds of placebo affects and how physician interaction effects;
1. The effect of receiving blinded placebo, compared to no treatment; and
2. The effect of receiving open-label active Echinacea treatment compared to blinded active treatment.
As per Brief Summary
Allocation: Randomized, Control: Placebo Control, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Treatment
Echinacea, Blinded placebo
University of Wisconsin-Madison Department of Family Medicine
Active, not recruiting
University of Wisconsin, Madison
Published on BioPortfolio: 2014-08-27T03:55:05-0400
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