방법 비교

	Matched Case-Crossover Design	중첩 환자-대조군 연구
분야	역학	역학
계열	Process / pipeline	Process / pipeline
기원 연도	1991 (base design); matched variant refined ~1998–2000	1973–1977
창시자	Malcolm Maclure (case-crossover); time-matched variant developed by Navidi (1998) and Lumley & Levy (2000)	Nathan Mantel (1973); D. C. Thomas (1977 formalization)
유형	Observational epidemiological design	Hybrid observational study design
원전	Maclure, M. (1991). The case-crossover design: a method for studying transient effects on the risk of acute events. American Journal of Epidemiology, 133(2), 144–153.	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.
별칭	matched case-crossover study, time-matched case-crossover, bidirectional case-crossover, symmetric bidirectional design	NCC study, nested CC design, case-control within cohort, density sampling case-control
관련	3	6
요약	The matched case-crossover design is a self-controlled observational study in which each case serves as its own control. A short hazard window immediately before the acute event is compared with one or more matched control windows — selected to have the same day of week, season, or other time-varying covariate — making the design robust to stable individual confounders and calendar-time trends simultaneously.	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.