Σύγκριση μεθόδων

	Μελετημένη Σχετιζόμενη Μελέτη Περίπτωσης-Ελέγχου	Μελέτη "φωλιασμένης" περίπτωσης-μάρτυρα
Πεδίο	Επιδημιολογία	Επιδημιολογία
Οικογένεια	Process / pipeline	Process / pipeline
Έτος προέλευσης	1970s	1973–1977
Δημιουργός	Mantel (1973), Thomas (1977); formalized by Breslow & Day (1980)	Nathan Mantel (1973); D. C. Thomas (1977 formalization)
Τύπος	Observational analytic study design	Hybrid observational study design
Θεμελιώδης πηγή	Rothman, K.J., Greenland, S., & Lash, T.L. (2008). Modern Epidemiology (3rd ed.). Lippincott Williams & Wilkins. ISBN: 978-0781755641	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.
Εναλλακτικές ονομασίες	matched NCC study, nested case-control with matching, matched risk-set sampling, incidence density matched case-control	NCC study, nested CC design, case-control within cohort, density sampling case-control
Συναφείς	5	6
Σύνοψη	A matched nested case-control study is an efficient observational design embedded within a defined cohort. When a participant develops the outcome of interest (a case), a small number of controls are sampled from those still at risk at that moment and matched to the case on key variables such as age, sex, or calendar time. This design preserves the temporal structure of the underlying cohort while sharply reducing the cost of exposure measurement.	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.