In a randomized clinical trial:

Question

Quizplus · Accepted Answer

In a randomized clinical trial, a target treatment (the treatment being tested) is typically compared against an organically inert treatment (placebo) to determine its effectiveness.

Answer: B
 In a randomized clinical trial, while researchers try to establish causality, it can be difficult to determine the direction of causality unambiguously.

Answer: C
 In a longitudinal study, the same people are observed at multiple points in time to track changes in their behavior or health outcomes over time.

Answer: D
 In a case-control study, researchers attempt to reconstruct the conditions that led to a current situation, such as a disease or condition, by comparing those who have the condition with those who do not.

In a Randomized Clinical Trial