In a trial, what is the purpose of screening?

In a trial, what is the purpose of screening?

• A. To determine eligibility of potential participants before enrollment.
• B. To assign participants to treatment groups.
• C. To monitor adverse events during follow-up.
• D. To obtain consent from participants.

Answer: (A)

Screening determines whether a potential participant meets the trial’s inclusion and exclusion criteria before enrollment. This step is essential to ensure the study population is appropriate for answering the research question and to protect participant safety, as it filters out individuals who could be harmed or for whom the trial isn’t suitable. Screening may involve medical history, physical exams, and necessary tests to confirm eligibility. It’s separate from obtaining consent (which happens to authorize participation) and from the processes that come after enrollment, such as randomization to treatment groups or monitoring adverse events during follow-up.

Screening determines whether a potential participant meets the trial’s inclusion and exclusion criteria before enrollment. This step is essential to ensure the study population is appropriate for answering the research question and to protect participant safety, as it filters out individuals who could be harmed or for whom the trial isn’t suitable. Screening may involve medical history, physical exams, and necessary tests to confirm eligibility. It’s separate from obtaining consent (which happens to authorize participation) and from the processes that come after enrollment, such as randomization to treatment groups or monitoring adverse events during follow-up.