A method used to prevent bias in a clinical trial. Neither the participants nor the doctor knows who is taking the study agent and who is not. Only researchers at a central office know.
Clinical trial in which participants do not know what treatment they are receiving. The doctors and nurses treating them don't know either. Researchers keep this information secret until each patient's health status is known, usually after at least a year or more of treatments.
a form of clinical trial in which neither the physician nor the patient knows the actual treatment which any individual patient is receiving; double-blind trials are a way of minimizing the effects of the personal opinions of patients and physicians on the results of the trial
a kind of clinical study in which neither the participants nor the person administering treatment know which treatment any particular subject is receiving. a method to reduce experimental bias.
A kind of clinical study in which neither the participants nor the person administering treatment know which treatment any particular subject is receiving. Usually the comparison is between an experimental drug and a placebo or standard comparison treatment.
an experimental procedure where neither the doctor nor the patient knows the identity of the people in a study.
A double-blind study means that neither the patient, nor the research staff and physician(s) know whether the patient is receiving placebo or actual medication. This is to prevent the patient's and researchers' expectations about the medication from influencing the results of the study. See also placebo.
Neither researcher nor participant know experimental condition.
a clinical testing method in which neither patient nor doctor know what medication or procedure is being used.
a type of experiment in which neither the subject nor the administrator knows whether the test treatment is real or fake.
A clinical trial in which the method for analyzing data has been specified in the protocol before the study has begun (prospective), the patients have been randomly assigned to receive either the study drug or alternative treatment, and in which neither the patient nor the physician(s) conducting the study know which treatment is being given to the patient.
See under "blinding"
A type of clinical trial in which people are divided into different groups. One group takes the experimental drug and other groups take different doses, the standard therapy, or a placebo. Neither the researchers nor the people in the trial know who is taking what until the trial is over.
People in this trial are divided into two or more groups. One group takes the experimental drug, and the other takes the standard therapy or a placebo. Neither the researchers nor the people in the trial know who is taking which drug until the trial is over.
When neither the patient nor the health care providers know which medications are being dispensed to trial participants. Double-blind studies are used to get impartial results and eliminate study bias.
A research design in which neither the investigator or the patient knows whether the patient is given a new drug or current standard of care until it is time to analyze the results.
Term used to described a study in which both the investigator or the participant are blind to (unaware of) the nature of the treatment the participant is receiving. Double-blind trials are thought to produce objective results, since the expectations of the researcher and the participant about the experimental treatment such as a drug do not affect the outcome. Also called double-masked. See also: Double-blinded study.
a type of clinical trial in which neither the subject nor the investigator knows what treatment, if any, the subject is receiving. At the end of the trial the "code" is broken and data are analyzed. Double-blinding is done to minimize bias due to the expectations of the subject, investigator(s) and/or healthcare provider(s).
In a typical double-blind trial, neither the researchers nor the patients know which treatment is being administered. However, this term is occasionally used to refer to other groups (see blinded).
A research procedure in which neither the patient nor the investigator knows who is receiving the experimental substance or procedure and who is receiving a placebo. Done to avoid bias in the study.
The design of a study in which neither the investigator or the subject knows which medication (or placebo) the subject is receiving.
A kind of clinical study in which neither the participants nor the doctors know who is receiving the experimental drug and who is receiving the placebo or standard comparison treatments. This method is believed to achieve the most accuracy because neither the doctors nor the patients can affect the observed results with their psychological biases.
A procedure for assigning treatment regimens which keeps both trial participants and members of the research staff from knowing which participants are on which assigned treatments.
A trial in which neither the patient nor the physician knows whether drug or placebo is being taken, or at what dosage.
Characteristic of a controlled experiment in which neither the patient nor the attending physician knows whether the patient is getting one or another drug or dose. In single blind studies, patients do not know which of several treatments they are receiving, thus preventing personal bias from influencing their reactions and study results. In either case, the treatment can be quickly identified, if necessary, by a special code.
an experimental protocol whereby neither the experimental subjects nor the administrators know whether a drug or placebo is being administered. Double-blind protocols are used to eliminate bias.
A trial design in which both the subjects and observers responsible for measuring the trial outcomes are kept ignorant of the group to which subjects are assigned.
Study design in which neither the patients nor the investigators know whether a patient is being given the active drug or a placebo.
or DOUBLE-MASK. (1) Neither the subject nor the study staff (those responsible for patient treatment and data collection) are aware of the group or intervention to which the subject has been assigned. (2) Any condition in which two different groups of persons are purposely denied access to information in order to keep that information from influencing some measurement, observation, or process.
A clinical study design in which neither the investigators nor the subjects know what the medications being tested are. Sealed codes identify which products have been used on which patients, and products are placed in identical containers to further hide product identity.
Clinical trial where patients as well as researchers do not know whether the medicine tested is real or placebo.
A type of clinical trial in which neither the subject nor the investigator knows what treatment, if any, the subject is receiving. ELISA See enzyme-linked immunosorbent assay.
Describes a clinical trial in which neither the researcher nor the patient knows which of several possible therapies the patient is receiving.
a research method when neither the person receiving the drug nor the person administering the drug knows whether it is a placebo or the real drug