手法を比較

	マッチ化ランダム化比較試験	前向き無作為化臨床試験
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 (landmark MRC streptomycin trial)
提唱者	Developed formally in biostatistics literature; Greevy, Imai and colleagues advanced modern frameworks in the 2000s	Austin Bradford Hill / Medical Research Council
種類	Experimental clinical study design	Experimental / interventional study design
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.	Medical Research Council (1948). Streptomycin treatment of pulmonary tuberculosis: a Medical Research Council investigation. British Medical Journal, 2(4582), 769–782.
別名	matched RCT, matched-pair randomized trial, matched randomized controlled trial, covariate-matched RCT	Prospective RCT, randomized controlled trial, RCT, controlled clinical trial
関連	6	5
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 prospective randomized clinical trial (RCT) is an experimental study in which participants are assigned to intervention or control groups by chance before any outcomes are observed, then followed forward in time. Random allocation eliminates systematic selection bias, making this design the gold standard for establishing causal efficacy of treatments in medicine and clinical research.