Some Aspects of Retrospective Studies

Autor: William Haenszel
Jazyk: English<br />Spanish; Castilian<br />Portuguese
Rok vydání: 2023
Předmět:
Zdroj: Revista Brasileira de Cancerologia, Vol 26, Iss 1 (2023)
Druh dokumentu: article
ISSN: 2176-9745
DOI: 10.32635/2176-9745.RBC.1976v26n1.3711
Popis: The statement that a disease and a characteristic are associated can be Tinterpreted in a number of different ways. (1) The deliberate introduction of the characteristic into a subgroup of a population will be followed by an altered incidence of the disease in that subgroup. (2) Those members of a population possessing the characteristic will experience a different incidence of the disease than will those lacking it, the route by which the characteristic was acquired being unspecified. (3) The prevalence of the characteristic among newly developed cases of the disease differs from its prevalence among those in whom the disease did not develop.
Databáze: Directory of Open Access Journals