手法を比較

	前向きネスト型症例対照研究	前向きコホート研究
分野	疫学	疫学
系統	Process / pipeline	Process / pipeline
提唱年	1977	1950s (systematic application); conceptual roots earlier
提唱者	D.C. Thomas (formal description); building on Mantel (1973) and Liddell, McDonald & Thomas (1977)	Richard Doll and Austin Bradford Hill (landmark application, 1951-1954); cohort methodology formalised by modern epidemiology textbooks
種類	Observational analytic design	Observational longitudinal study design
原典	Thomas, D.C. (1977). Addendum to: Methods of cohort analysis: Appraisal by application to asbestos mining. By F.D.K. Liddell, J.C. McDonald, and D.C. Thomas. Journal of the Royal Statistical Society, Series A, 140(4), 469-491.	Rothman, K. J., Greenland, S., & Lash, T. L. (2008). Modern Epidemiology (3rd ed.). Lippincott Williams & Wilkins. ISBN: 978-0781755641
別名	prospective NCC, nested case-control within prospective cohort, prospective case-control within cohort, incident NCC	longitudinal cohort study, prospective follow-up study, incidence study, prospective observational cohort
関連	5	6
概要	A prospective nested case-control study enrolls a cohort before disease onset, follows participants forward in time, and then — once cases develop — samples matched controls from those still at risk at the time each case occurs. By embedding the case-control comparison inside a prospective cohort, the design combines the causal clarity of longitudinal follow-up with the cost efficiency of analysing only a fraction of the cohort's stored specimens or records.	A prospective cohort study assembles a group of participants who are free of the outcome of interest at baseline, measures their exposures, and then follows them forward in time to record who develops the outcome. By collecting exposure data before outcomes occur, it establishes a clear temporal sequence that supports causal inference — a major advantage over retrospective designs. It is the cornerstone observational method in epidemiology and clinical research.