手法を比較

	ランダム化比較試験 (RCT)	フェーズIII臨床試験
分野	疫学	疫学
系統	Process / pipeline	Process / pipeline
提唱年	1948 (first rigorously conducted RCT — MRC streptomycin trial)	1962 (Kefauver-Harris Amendment formalised phased drug development)
提唱者	Austin Bradford Hill; MRC Streptomycin Trial team	FDA regulatory framework / ICH guidelines
種類	Interventional experimental study	Confirmatory randomised controlled trial
原典	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	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
別名	RCT, randomized controlled trial, randomised controlled trial, clinical randomized trial	Phase 3 trial, confirmatory trial, pivotal trial, Phase III RCT
関連	6	6
概要	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.	A Phase III clinical trial is a large-scale, confirmatory randomised controlled trial designed to establish the efficacy and safety of an intervention in the target patient population before regulatory submission. It builds on the signal identified in Phase II, tests the intervention at its proposed dose under controlled conditions, and provides the primary evidence base for marketing authorisation or guideline adoption.