Historique
Article de Périodique
Ignoring "downstream infection" in the evaluation of harm reduction interventions for injection drug users (2001)
(La non-prise en compte des contaminations "secondaires" dans l'évaluation des interventions en matière de réduction des risques pour les usagers de drogues par voie intraveineuse)
Auteur(s) :
POLLACK, H. A.
Année
2001
Page(s) :
391-395
Langue(s) :
Anglais
Refs biblio. :
20
Domaine :
Drogues illicites / Illicit drugs
Discipline :
EPI (Epidémiologie / Epidemiology)
Thésaurus mots-clés
INJECTION
;
REDUCTION DES RISQUES ET DES DOMMAGES
;
MODELE STATISTIQUE
;
HEPATITE
;
VIH
;
EVALUATION
;
EPIDEMIOLOGIE
;
ENQUETE
Thésaurus géographique
EUROPE
Note de contenu :
graph.
Résumé :
ENGLISH :
Harm reduction interventions to reduce blood-borne disease incidence among injection drug users (IDUs). A common strategy to estimate the long-term impact of such interventions is to examine short-term incidence changes within a specific group of individuals exposed to the intervention. Such evaluations may overstate or understate long-term program effectiveness, depending upon the relationship between short-term and long-term incidence and prevalence. This short paper uses steady-state comparisons and a standard random-mixing model to scrutinize this evaluation approach. It shows that evaluations based upon short-term incidence changes can be significantly biased. The size and direction of the resulting bias depends upon a simple rule. For modest interventions, such analyses yield over-optimistic estimates of program effectiveness when steady-state disease prevalence exceeds 50% absent intervention. When steady-state prevalence is below 50%, such analyses display the opposite bias. (Review' s abstract)
Affiliation :
Univ. of Michigan School of Public Health, SPH II, 109 Observatory, Ann Arbor, MI 48109-2029
Etats-Unis. United States.
Etats-Unis. United States.