| Titre : | Long-term perspective on the prevalent-cohort biases in studies of human immunodeficiency virus progression. (1997) |
| Auteurs : | P. ALCABES ; P. PEZZOTTI ; A.N. PHILLIPS ; G. REZZA ; D. VLAHOV ; Istituto Superiore di Sanità. Centro Operativo Aids. Rome. ITA |
| Type de document : | Article |
| Dans : | American journal of epidemiology (vol. 146, n° 7, 1997) |
| Pagination : | 543-551 |
| Langues: | Anglais |
| Mots-clés : | Sida ; Virose ; Infection ; VIH ; Rétrovirus ; Virus ; Prévalence ; Incidence ; Evolution ; Epidémiologie ; Méthodologie ; Biais ; Homme ; Immunopathologie |
| Résumé : | [BDSP. Notice produite par INIST 4tttYR0x. Diffusion soumise à autorisation]. Because considerable information about progression of human immunodeficiency virus (HIV) infection has been provided by studies of cohorts of individuals with prevalent HIV infection, this study was designed to investigate bias due to onset confounding (differential time-since-infection distributions) and differential length-biased sampling in epidemiologic analyses of data from such cohorts. Subjects were participants in the Italian Seroconverters Study, a seroincident cohort of more than 1,200 adults seen at ambulatory care clinics in Italy, with observed HIV seroconversion in 1980-1988. Acquired immunodeficiency syndrome (AIDS) diagnoses, based on the 1987 Centers for Disease Control case definition, and mortality were ascertained through Italian national registries through 1994. To estimate bias in prevalent cohorts, a series of pseudoseroprevalent (PSP) cohorts were drawn by sampling, from among the total seroincident cohort, prevalent AIDS-free subjects in each calendar year. The relative AIDS risk associated with a given covariate was calculated in each PSP cohort and compared with the relative AIDS risk for that covariate in the seroincident cohort. Relative risks were estimated by both the ratio of AIDS incidence densities and the relative AIDS hazards from proportional hazards regression. (...) |
Service Documentation EHESP
Me connecter
PORTAIL DOCUMENTAIRE
École des hautes études en santé publique
Catalogue
Multi-bases
Accueil
Sélection de la langue
Adresse
Service Documentation EHESPBibliothèque Rennes Avenue du Professeur Léon Bernard – CS 74312 – 35043 Rennes Cedex Bibliothèque MSSH Paris 20 avenue George Sand - 93210 La Plaine Saint-Denis
France
Bibliothèque Rennes : 02 99 02 29 50 Bibliothèque MSSH Paris : 02 99 02 24 50
contact