title: [Elementary structure of a study].
abstract: Medical research provides evidence in three gnostic domains; etiognosis, diagnosis and prognosis. The occurrence relation, the domain and the study population characterize every medical study. The determinant and the outcome define the occurrence relation. The domain defines the type of situation in which the occurrence relation is explored. The study population contains representatives of the domain whose experience is captured within the study.
authors.affiliation: Horten Zentrum für praxisorientierte Forschung und Wissenstransfer, Universitätsspital Zürich. lucas.bachmann@usz.ch
authors.forename: L M
authors.initials: LM
authors.lastname: Bachmann
mesh_terms: D002986:Clinical Trials as Topic / Q000379:methods* / Q000706:statistics & numerical data; D003933:Diagnosis; D004194:Disease / Q000209:etiology; D015340:Epidemiologic Research Design; D006801:Humans; D017063:Outcome Assessment, Health Care / Q000706:statistics & numerical data; D011379:Prognosis; D015203:Reproducibility of Results; D013812:Therapeutics