مقایسهٔ روش‌ها

	مطالعه فاز چهارم آینده‌نگر	مطالعه مورد-شاهدی
حوزه	اپیدمیولوژی	اپیدمیولوژی
خانواده	Process / pipeline	Process / pipeline
سال پیدایش	1970s–1980s (formalized in post-marketing regulatory frameworks)	1950s (formal methodology); precursors in the 1920s
پدیدآور	Regulatory and pharmaceutical research community (ICH E2E, EMA PASS guidelines)	Janet Lane-Claypon (early precursors, 1926); formalized by Brian MacMahon and Jerome Cornfield in the 1950s–1960s
نوع	Observational / interventional post-marketing study design	Observational analytic study design
منبع بنیادین	Strom, B.L. (Ed.). (2005). Pharmacoepidemiology (4th ed.). Wiley. ISBN: 978-0470863088	Schlesselman, J.J. (1982). Case-Control Studies: Design, Conduct, Analysis. Oxford University Press. ISBN: 978-0195027860
نام‌های دیگر	prospective post-marketing surveillance study, prospective pharmacovigilance study, prospective post-authorization safety study, PASS (prospective)	case-referent study, case-control design, retrospective case-control, case-control analysis
مرتبط	5	6
خلاصه	A prospective Phase IV study is a post-marketing investigation conducted after a drug, device, or intervention has received regulatory approval, following participants forward in real time to collect safety, effectiveness, and utilization data under routine clinical practice conditions. Unlike retrospective designs that mine existing records, prospective enrollment allows pre-specified data collection, defined follow-up windows, and direct measurement of outcomes as they occur, making it central to post-authorization safety surveillance and long-term effectiveness research.	A case-control study is a retrospective observational design in which individuals who have developed a disease or outcome of interest (cases) are compared with individuals who have not (controls) to determine whether prior exposure to a putative risk factor differs between the two groups. The primary measure of association is the odds ratio, which approximates the relative risk when the outcome is rare. Case-control studies are especially efficient for investigating rare diseases and generating etiological hypotheses.