विधियों की तुलना करें
चुनी हुई विधियों की आमने-सामने समीक्षा करें; भिन्नता वाली पंक्तियाँ रेखांकित हैं।
| बहु-केंद्रित चरण IV अध्ययन× | यादृच्छिक नैदानिक परीक्षण (RCT)× | |
|---|---|---|
| क्षेत्र | महामारी विज्ञान | महामारी विज्ञान |
| परिवार | Process / pipeline | Process / pipeline |
| उद्भव वर्ष≠ | 1980s–1990s (formalized with post-marketing requirements in modern drug regulation) | 1948 (first rigorously conducted RCT — MRC streptomycin trial) |
| प्रवर्तक≠ | Regulatory agencies and pharmaceutical industry (ICH E2E, FDA, EMA post-marketing frameworks) | Austin Bradford Hill; MRC Streptomycin Trial team |
| प्रकार≠ | Observational or interventional post-marketing study | Interventional experimental study |
| मौलिक स्रोत≠ | Strom, B. L., & Kimmel, S. E. (Eds.). (2005). Textbook of Pharmacoepidemiology. John Wiley & Sons. ISBN: 978-0470029619 | Friedman, L. M., Furberg, C. D., DeMets, D. L., Reboussin, D. M., & Granger, C. B. (2015). Fundamentals of Clinical Trials (5th ed.). Springer. ISBN: 978-3319185385 |
| उपनाम | multicenter post-marketing study, multicenter pharmacovigilance study, multi-site phase IV study, post-authorization safety study | RCT, randomized controlled trial, randomised controlled trial, clinical randomized trial |
| संबंधित | 6 | 6 |
| सारांश≠ | A multicenter Phase IV study is a post-marketing surveillance investigation conducted simultaneously at two or more clinical or research sites after a drug, device, or intervention has received regulatory approval. By pooling real-world data from diverse patient populations and geographic regions, it detects rare adverse events, evaluates long-term effectiveness, characterizes safety in subgroups, and fulfills regulatory post-authorization commitments that single-site studies cannot achieve. | A randomized clinical trial (RCT) is an experimental study design in which participants are randomly assigned to an intervention group or a control group, then followed prospectively to compare outcomes. Random allocation is the defining feature: it distributes known and unknown confounders across groups by chance, making the RCT the strongest individual study design for establishing causal efficacy of a treatment or intervention under controlled conditions. |
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