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Study Design: Three-arm Wait-list Randomized Clinical Trial

📌 Overview:
A three-arm wait-list randomized clinical trial (RCT) is a study design used to evaluate the effectiveness of an intervention while ensuring all participants eventually receive the treatment.

📌 Study Groups:
1️⃣ Intervention Group: Receives the treatment immediately.
2️⃣ Active Control Group: May receive an alternative intervention.
3️⃣ Wait-list Control Group: Receives the treatment after a delay.

📌 Key Features:
✔ Randomization: Participants are randomly assigned to one of the three groups.
✔ Wait-list Design: Ensures ethical treatment distribution, reducing the impact of withholding care.
✔ Comparative Analysis: Allows evaluation of both immediate and delayed effects of the intervention.

📌 Benefits of This Design:

• Minimizes ethical concerns of withholding treatment.
• Helps assess long-term effects of the intervention.
• Improves participant retention, as all eventually receive the treatment.