مقایسهٔ روش‌ها

	کارآزمایی بالینی فاز III تطبیقی	مطالعه کوهورت همسان
حوزه	اپیدمیولوژی	اپیدمیولوژی
خانواده	Process / pipeline	Process / pipeline
سال پیدایش	Mid-20th century (matching in RCTs formalized ~1950s–1970s)	Mid-20th century; propensity-score variant 1983
پدیدآور	Fisher, R. A. (matching principles); adapted into confirmatory trial design over mid-20th century	Established practice; propensity-score matching formalized by Rosenbaum & Rubin (1983)
نوع	Controlled confirmatory clinical trial with matching	Observational analytic study design
منبع بنیادین	Rothman, K. J., Greenland, S., & Lash, T. L. (2008). Modern Epidemiology (3rd ed.). Lippincott Williams & Wilkins. ISBN: 978-0781755641	Rothman, K. J., Greenland, S., & Lash, T. L. (2008). Modern Epidemiology (3rd ed.). Lippincott Williams & Wilkins. ISBN: 978-0781755641
نام‌های دیگر	matched controlled Phase III trial, Phase III matched-pair trial, matched confirmatory trial, matched late-phase RCT	matched follow-up study, paired cohort study, propensity-matched cohort, matched prospective study
مرتبط	5	5
خلاصه	A matched Phase III clinical trial is a confirmatory, late-stage controlled study in which each participant assigned to the experimental treatment is paired with one or more controls who share key prognostic characteristics — such as age, disease stage, or comorbidities — before treatment allocation. By ensuring baseline comparability at the level of matched pairs, the design reduces confounding and improves statistical efficiency in settings where simple randomization alone may produce imbalanced groups or where full randomization is logistically or ethically constrained.	A matched cohort study is an observational design in which each exposed participant is paired with one or more unexposed counterparts who share key characteristics — such as age, sex, or comorbidity status — before both groups are followed forward in time to compare incident outcomes. Matching controls for measured confounders at the design stage, reducing bias that would otherwise require statistical adjustment alone.