A statistical plan by which treatments are assigned by chance to patients under study. Randomization is the basis of the statistical design used in the clinical trial setting.

The process by which patients in a clinical trial are randomly assigned to different treatments. Randomization minimizes the differences among groups by equally distributing people with particular characteristics among all the trial arms.

Randomly assigning study subjects into groups to receive or not receive an experimental procedure or intervention. This type of subject assigning occurs only in randomized clinical trials.

A schedule for allocating treatment material and for conducting treatment combinations in a DOE such that the conditions in one run neither depend on the conditions of the previous run nor predict the conditions in the subsequent runs. Note: The importance of randomization cannot be over stressed. Randomization is necessary for conclusions drawn from the experiment to be correct, unambiguous and defensible.

Any of the many methods used to assign subjects to an experimental group or control group so that assignment is not influenced in any way by those making the assignments or by the researchers conducting the trial. Random assignment reduces the potential for bias in a trial.

The process by which every member of a selected population has an equal chance of being assigned into a treatment group or control group.

Randomization (in scientific experiments) provides data observations that are independently distributed, as required for the valid application of statistical methods. By random allocation of experimental units and the sequence in which trials are conducted: (1) effects of extraneous factors are averaged out; (2) experimenter bias is removed. The use of controls can help varify randomization.

Method used to prevent bias in research studies; a computer or a table of random numbers generates treatment assignments, and participants have an equal chance to be assigned to one of two or more groups (eg, the control group or the investigational group).

A technique which gives every patient an equal chance of winding up in any particular arm of a controlled clinical trial.

Assigning people to treatment and control groups in an unbiased manner so as to produce groups similar in characteristics not controlled by other methods. Sometimes called random assignment of subjects to groups, or random allocation.

a deliberately haphazard arrangement of observations so as to simulate chance

Used to allocate subjects to experimental and control groups. The subjects are initially considered not unequal because they were randomly selected.

This occurs after screening, where a subject is assigned to a study treatment either by the study coordinator or by the sponsor.

A method used to prevent bias in research. People are assigned by chance to either the treatment or control group.

A method based on chance by which study participants are assigned to one group or arm of the study. Randomization is considered to be the most reliable method for creating groups that, prior to the start of the study, are balanced in terms of various characteristics (for example, age, ethnicity, and severity of illness). Each participant has an equal chance of being assigned to each of the arms of the study. While the selection is often done by computer, it is similar to the common practice of "flipping a coin" to choose between 2 alternatives.

Randomized clinical trials assign patients, in no particular order, to different groups in a study (for example, one group receives the research drug and the other group receives the usual treatment). Randomization reduces the risk of favoritism in the patient selection process. To make it fair, a computer performs the randomization process; your doctor is not involved.

Chance assignments to different treatment groups.

A method of assigning study treatment such that each participant has an equal chance of being assigned to each treatment or control group. Randomization guards against selection bias, that is, that specific criteria are used to assign patients to one group or another.

a method of selecting treatment assignment by chance (sometimes compared to "flipping a coin")

Randomized The process of assigning research participants to different treatment groups using an element of chance to determine the assignments in order to reduce bias.

a technique of assigning patients to treatment and control groups that is based only on chance distribution. It is used to diminish patient selection bias in clinical trials. Proper randomization of patients is an indifferent yet objective technique that tends to neutralize patient prognostic factors by spreading them evenly among treatment and control groups. Randomized assignment is often based on computer-generated tables of random numbers.

A method used to prevent Bias in research. Participants are assigned by chance to either the Experimental or Control Group of a Clinical Trial.

The method of assigning patients by chance (luck of the draw) to either the treatment under investigation or to the existing standard of care. This is the only reliable means of verifying the small to moderate benefits of new treatments.

The process by which study subjects are assigned to treatment groups. Each participant has an equal chance of being assigned to a particular treatment group.

A method based on chance by which study participants are assigned to a treatment group. Randomization minimizes the differences among groups by equally distributing people with particular characteristics among all the trial arms. The researchers do not know which treatment is better. From what is known at the time, any one of the treatments chosen could be of benefit to the participant.

A method of minimizing bias in a controlled study, in which all subjects have an equal chance of being assigned to the study group or control group. In this way, all factors which might confound the results of the study can be considered to be equally present in both groups.

RAN-dum-eye-ZAY-shun] The process of assigning patients to two or more treatment options, where each patient has an equal chance of receiving each treatment.

The process of randomly assigning clinical trial volunteers into separate arms. This is done to make sure that the arms are evenly balanced by patient characteristics and that bias is not introduced by the assignment of patients.

a procedure in which the assignment of subjects and treatments to groups is based on chance. Randomization ensures control over the extraneous variables and increases the reliability of the experiment.

The process of randomly assigning study participants to either the control (standard treatment or no treatment) or experimental (new drug) group.

The assignment of individuals to treatment groups in such a way that each individual in a clinical trial has an equal chance to be assigned to each treatment group. (Also see Double-Blind Trial)

The process of selection done in a way so that there is no predictable or specific pattern. In a research study, the assignment of volunteers to one test group or another is randomized to eliminate the possibility that the results will be influenced to factors not measured in the study. In the MOMS the chances of being in either the prenatal or postnatal surgery groups is 50%, the same odds as getting a heads or tails when flipping a coin.

Procedure to ensure that every member of a target population has an equal chance of inclusion in a sample. Randomization is necessary to deal with individual differences.

The allocation of individuals to groups by chance. Within the limits of chance variation, randomization should make the control and experimental groups similar.

The process of assigning patients to different treatments by chance.

A method used to prevent bias in research. People are assigned by chance, often by a computer, either to receive the study agent (intervention group) or not (control group).

Division into groups without preference.

The process of assigning trial subjects to treatment or control groups using an element of chance to determine the assignments in order to reduce bias. This is like flipping a coin.

Assignment of subjects to different treatments, interventions, or conditions according to chance rather than systematically (e.g., as dictated by the standard or usual response to their condition, history, or prognosis, or according to demographic characteristics). Random assignment of subjects to conditions is an essential element of experimental research because it makes more likely the probability that differences observed between subject groups are the result of the experimental intervention.

Computer process that selects which part of a trial each person will be placed in. There is no predetermined pattern to the selection process; it is left purely to chance.

When referring to an experiment or clinical trial, the process by which animal or human subjects are assigned by chance to separate groups that compare different treatments or other interventions. Randomization gives each participant an equal chance of being assigned to any of the groups.

Study participants are usually assigned to groups in such a way that each participant has an equal chance of being assigned to each treatment (or control) group. Since randomization ensures that no specific criteria are used to assign any patients to a particular group, all the groups will be equally comparable.

random assignment of patients to different types of treatment specified in a clinical trial.

Computer process which selects which section of a trial each patient will be placed in. There is no predetermined pattern to the selection process - it is left purely to chance (like flipping a coin).

The process of assigning subjects to different treatments (or vice versa) by using random numbers.

A process that reduces the likelihood of bias by assigning people to specific groups (e.g., experimental and control groups) by chance alone (randomly). When groups are created by random assignment, individual characteristics are less likely to make the results inaccurate.

a process used in clinical trials that uses chance to assign participants to different groups that compare treatments. Randomization means that each person has an equal chance of being in the treatment and comparison groups. This helps reduce the chance of bias in the results that might happen, if, for example, the healthiest people all were assigned to a particular treatment group. See also control group, clinical trials.

(ran-dum-uh-ZAY-shun) Process of assigning patients to treatment so that each patient has an equal chance of receiving either treatment and so that no bias is introduced in the assignment.