NEET PG High-Yield: Randomized Controlled Trials (RCT)
RCTs are the gold standard for evaluating the efficacy of clinical interventions. They are experimental, prospective studies where investigators actively manipulate the exposure.
Key Components of Randomization
| Method | Mechanism |
|---|---|
| Simple Randomisation | Like flipping a coin, unpredictable but can lead to unequal groups in small trials. |
| Blocked Randomisation | Ensures equal distribution across groups by assigning participants in fixed blocks (e.g., blocks of 4). |
| Stratified Randomisation | Group participants by important variables (e.g., age, disease severity) before random assignment. |
High-Yield NEET PG Pearls:
- Blinding:• Single blind: Patient is unaware.
• Double blind: Patient and investigator are unaware.
• Triple blind: Patient, investigator, and data analyst are unaware.
- Randomisation: The most important step to eliminate selection bias and ensure baseline comparability between groups.
- Allocation Concealment: Essential to prevent researchers from knowing which group a participant will be assigned to *before* they are enrolled.
- Phase of Clinical Trials:
- Phase I (Safety/Toxicity),
- Phase II (Efficacy/Dose),
- Phase III (Comparison/RCT),
- Phase IV (Post-marketing surveillance).