Linganisha mbinu

	Utafiti Ulinganifu wa Kesi na Kidhibiti	Utafiti Uliojengwa wa Kesi-Udhibiti
Nyanja	Epidemiolojia	Epidemiolojia
Familia	Process / pipeline	Process / pipeline
Mwaka wa asili	1950s–1970s	1973–1977
Mwanzilishi	Brian MacMahon and others; systematised by Schlesselman (1982)	Nathan Mantel (1973); D. C. Thomas (1977 formalization)
Aina	Observational analytic design	Hybrid observational study design
Chanzo asilia	Rothman, K. J., Greenland, S., & Lash, T. L. (2008). Modern Epidemiology (3rd ed.). Lippincott Williams & Wilkins. ISBN: 978-0781755474	Thomas, D. C. (1977). Addendum to: Methods of cohort analysis: Appraisal by application to asbestos mining. Journal of the Royal Statistical Society, Series A, 140(4), 469–491.
Majina mbadala	matched case-referent study, individually matched case-control, pair-matched case-control, matched case-control design	NCC study, nested CC design, case-control within cohort, density sampling case-control
Zinazohusiana	5	6
Muhtasari	A matched case-control study is an observational epidemiological design in which each case (a person with the disease or outcome of interest) is paired with one or more controls (persons without the outcome) who share one or more characteristics — such as age, sex, or clinical setting — to control confounding. Exposure history is then compared between cases and their matched controls to estimate the odds ratio of the exposure-disease association.	A nested case-control study is an efficient observational design embedded within a defined cohort. For each participant who develops the outcome of interest (a case), a small number of matched controls are sampled from those still at risk at the same point in time. This density-sampling strategy yields odds ratios that approximate incidence-rate ratios from the full cohort at a fraction of the data-collection cost — making it the preferred alternative when measuring exposures for all cohort members would be prohibitively expensive or technically demanding.