Double-blind
Neither you nor the study team knows which group you are in.
What it means
In a double-blind study, both the participant and the study staff working with them are kept unaware of which treatment that participant is receiving until the study ends.
Why it matters if you take part
Knowing which treatment someone received can influence how they report how they feel, and how staff record results. Blinding removes that influence.
What it looks like in practice
The registry lists masking as DOUBLE, TRIPLE, or QUADRUPLE depending on how many groups of people are kept unaware. There is always a way to unblind urgently if a doctor needs to know for safety.
Related terms
Trials recruiting now that are double-blind
316 recruiting trials in our Canadian corpus are double-blind.
A Study of Brenipatide (LY3537031) in Participants With Irritable Bowel Syndrome-Constipation (IBS-C)
Irritable Bowel Syndrome · PHASE2
Ambulatory Oxygen Therapy for Individuals With Mild-to-moderate Interstitial Lung Disease
Fibrotic Interstitial Lung Disease · PHASE2
A Study to Learn About the Study Medicine Called Berobenatide (PF-08653944) in People With Overweight or Obesity
Obesity · PHASE3
A Study to Evaluate Brenipatide Compared With Placebo in Adult Participants With Uncontrolled Moderate to Severe Asthma
Asthma · PHASE2
A Study of Brenipatide (LY3537031) in Adult Participants With Moderate-to-Severe Chronic Obstructive Pulmonary Disease (COPD)
Pulmonary Disease, Chronic Obstructive · PHASE2
A Study of LY4256984 in Participants With Sporadic Amyotrophic Lateral Sclerosis
ALS (Amyotrophic Lateral Sclerosis) · PHASE1
This explains how clinical research works. It is not medical advice and does not describe any specific condition or treatment. Only a trial site can determine whether someone can take part in a study.