手法を比較

	適応型第III相臨床試験	多施設共同無作為化臨床試験
分野	疫学	疫学
系統	Process / pipeline	Process / pipeline
提唱年	1969–2019 (sequential testing roots ~1969; formal adaptive design guidance 2010–2019)	1970s–1980s (widespread adoption for large-scale efficacy trials)
提唱者	Methodological foundations by Armitage et al. (1969); modern adaptive framework codified by FDA and ICH guidance (2010s)	Evolved from single-center RCT methodology; consolidated through landmark trials such as the MRC streptomycin trial (1948) and large cardiovascular mega-trials of the 1970s–1980s
種類	Interventional confirmatory clinical trial with pre-specified interim adaptations	Interventional experimental design
原典	International Council for Harmonisation of Technical Requirements for Pharmaceuticals for Human Use (ICH). (2019). ICH E9(R1) Addendum on Estimands and Sensitivity Analysis in Clinical Trials to the Guideline on Statistical Principles for Clinical Trials. ICH Harmonised Guideline.	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	adaptive confirmatory trial, seamless Phase II/III adaptive trial, adaptive pivotal trial, adaptive design Phase III	multi-site RCT, multicenter RCT, multinational randomized trial, multicenter controlled trial
関連	6	6
概要	An adaptive Phase III clinical trial is a confirmatory randomized controlled trial that incorporates pre-specified rules allowing modifications to the trial design — such as sample size re-estimation, dose selection, or population enrichment — based on accumulating interim data, while preserving the Type I error rate. It sits at the top of the evidence hierarchy and is used to obtain regulatory approval of new interventions.	A multicenter randomized clinical trial (RCT) is an experimental study in which eligible participants are randomly assigned to intervention or control arms simultaneously across two or more clinical sites. By combining the rigor of randomization with enrollment from geographically or institutionally diverse centers, this design produces large samples and externally valid effect estimates that single-center trials rarely achieve. It is the regulatory gold standard for confirmatory efficacy and safety evaluation of new treatments.