পদ্ধতির তুলনা করুন

	বাস্তব-বিশ্ব প্রমাণ অধ্যয়ন (Real-World Evidence Studies)	কোহর্ট স্টাডি ডিজাইন
ক্ষেত্র	ক্লিনিক্যাল গবেষণা	ক্লিনিক্যাল গবেষণা
পরিবার	Process / pipeline	Process / pipeline
উদ্ভবের বছর	2010s-present	1970s-1980s
প্রবর্তক	FDA, EMA, and health agencies; Sherman et al. (2016) defined RWE formally	Donald Acheson, Olli Miettinen, and others in modern epidemiology
ধরন	Research Design	Research Design
মৌলিক উৎস	Sherman, R. E., Anderson, S. A., Dal Pan, G. J., Gray, G. W., Gross, T., Hunter, N. L., ... & Califf, R. M. (2016). Real-world evidence—what is it and what can it tell us? New England Journal of Medicine, 375(23), 2293–2297.	Miettinen, O. S. (1976). Estimability and estimation in case-referent studies. American Journal of Epidemiology, 103(2), 226–235.
অপর নাম	real-world evidence, RWE, RWD, effectiveness research	prospective study, follow-up study, longitudinal study, cohort study
সম্পর্কিত	3	2
সারসংক্ষেপ	Real-World Evidence (RWE) is clinical evidence derived from Real-World Data (RWD)—data routinely collected in clinical practice from electronic health records, insurance claims, patient registries, and other healthcare sources. Formalized by the FDA in 2016 (Sherman et al.), RWE addresses a critical gap: while randomized trials test drugs under ideal conditions, RWE evaluates how treatments actually work in diverse, real patients with comorbidities, competing medications, and varied adherence. RWE complements (not replaces) trial evidence, accelerating regulatory decision-making and supporting post-market surveillance.	A cohort study follows a group of individuals forward in time from exposure to outcome. Exposed and unexposed participants (or participants with differing exposure levels) are enrolled at baseline, characterized, and observed prospectively until the outcome occurs or the study ends. Cohort studies are fundamental to epidemiology and are the design of choice for establishing causal associations when randomized trials are infeasible or unethical.