手法を比較

	マッチ化ランダム化比較試験	ランダム化比較試験 (RCT)
分野	疫学	疫学
系統	Process / pipeline	Process / pipeline
提唱年	Mid-20th century concept; methodological formalization circa 2000–2010	1948 (first rigorously conducted RCT — MRC streptomycin trial)
提唱者	Developed formally in biostatistics literature; Greevy, Imai and colleagues advanced modern frameworks in the 2000s	Austin Bradford Hill; MRC Streptomycin Trial team
種類	Experimental clinical study design	Interventional experimental study
原典	Imai, K., King, G., & Nall, C. (2009). The essential role of pair matching in cluster-randomized experiments, with application to the Mexican universal health insurance evaluation. Statistical Science, 24(1), 29–53.	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	matched RCT, matched-pair randomized trial, matched randomized controlled trial, covariate-matched RCT	RCT, randomized controlled trial, randomised controlled trial, clinical randomized trial
関連	6	6
概要	A matched randomized clinical trial pairs participants (or clusters) on key baseline characteristics before randomization, then allocates one member of each pair to treatment and the other to control. This design combines the causal validity of randomization with the covariate balance of matching, increasing statistical efficiency and reducing confounding from known prognostic variables without sacrificing the internal validity of a controlled experiment.	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.