A clinical trial where participants are switched from one arm to the other part way through.
In crossover trials, each subject receives both treatments being compared or the treatment and control. Such trials are used for patients who have a stable, usually chronic, condition during both treatment periods.
A clinical trial in which all participants receive both treatments, but at different times. Halfway through the study, one group is switched from the experimental treatment to the control treatment (standard treatment), and the other group is switched from the control to the experimental treatment.
A study design with two or more groups, where participants in one group receive one intervention for a period of time, then switch over to the second intervention (and vice versa -- participants in the other group start with the second intervention and switch back to the first).
a method of comparing 2 interventions in which patients are switched to the alternate intervention after a specified period of time.
A method of comparing two or more treatments or interventions in which subjects or patients, on completion of the course of one treatment, are switched to another. Typically, allocation to the first treatment is by random process. Participants' performance in one period is used to judge their performance in others, usually reducing variability. See also BEFORE-AFTER TRIAL.
