If the same individual participates in both study and experimental group (patient serves as his or her own control), it is called:
Correct Answer: Cross over study
Description: Ans. A. Cross over studyExplanationCross over type of study designs are the randomized controlled trials, in which each patient serves as his own control. A better understanding can be taken from the diagram.Here the patient is initially either enrolled into intervention group or control group, after a specified duration the person is crossed over alternate group (e.g. patient initially enrolled in intervention arm, later after a period (say 3 months) he is crossed to control arm, i.e. he now receives control treatment, e.g. placebo).They have added advantage that all the participants receive the intervention at some time. The number of patients and time are also reduced.Cannot be used when:Drug cures the diseaseDrug is effective only in certain stage of diseaseDisease changes radically during the period of time required for the study.
Category:
Social & Preventive Medicine
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now