Question

Which of the following is the correct sequence in a Randomized Controlled Trial (RCT)?

• A. Follow-up \(\rightarrow\) Manipulation \(\rightarrow\) Assessment \(\rightarrow\) Randomization
• B. Randomization \(\rightarrow\) Manipulation \(\rightarrow\) Follow-up \(\rightarrow\) Assessment
• C. Assessment \(\rightarrow\) Randomization \(\rightarrow\) Follow-up \(\rightarrow\) Manipulation
• D. Manipulation \(\rightarrow\) Assessment \(\rightarrow\) Follow-up \(\rightarrow\) Randomization

Hint:

RCT sequence: randomize first, intervene next, follow-up, then assess outcome.

Answer 1

The Correct Option is B

Step 1: Understanding the Question:
The question asks for the logical, chronological steps used to conduct a standard clinical trial (RCT).
Step 2: Detailed Explanation:

The Core of an RCT: An RCT is a prospective experiment designed to eliminate bias and compare the effectiveness of two interventions.

The Chronological Flow:

Selection: Participants are selected based on eligibility criteria.

Randomization: The defining step. Participants are randomly assigned to experimental or control groups to ensure comparable baselines. This must happen before the intervention.

Manipulation (Intervention): The specific drug or procedure is applied to the experimental group.

Follow-up and Assessment: The subjects are followed over time and the predefined health outcomes are measured and assessed.


Conclusion: Only Option B represents a logically sound and standard sequence for an RCT.

Step 3: Final Answer:
The standard sequence for an RCT always begins with randomization, followed by manipulation of the study group, and then subsequent assessment and follow-up.