value of an aggregate index in describing the ... - Semantic Scholar
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value of an aggregate index in describing the ... - Semantic Scholar
class and aggregating across drug classes. Higher index values indi- cate more resistance. RESULTS: Adaptive-use DRIs remained stable over time at approxi-.
original article
Value of an aggregate index in describing the impact of trends in antimicrobial resistance for Escherichia coli David M Patrick MD FRCPC MHSc1,2, Catharine Chambers MSc1, Dale Purych MD3,4, Mei Chong MSc1, Diana George MSc1, Fawziah Marra BSc PharmD FCSHP5 DM Patrick, C Chambers, D Purych, M Chong, D George, F Marra. Value of an aggregate index in describing the impact of trends in antimicrobial resistance for Escherichia coli. Can J Infect Dis Med Microbiol 2015;26(1):33-38.
La valeur d’un indice composite pour décrire les effets des tendances de résistance antimicrobienne à l’Escherichia coli
Background: Drug resistance indexes (DRIs) quantify the
HISTORIQUE : Les indices de pharmacorésistance (IPR) quantifient l’effet cumulatif de la résistance antimicrobienne sur la probabilité qu’un pathogène donné soit susceptible à un traitement antimicrobien. OBJECTIF : Dériver l’IPR des infections urinaires d’origine non nosocomiale causées par l’Escherichia coli en Colombie-Britannique entre 2007 et 2010 et examiner les tendances au fil du temps et selon les caractéristiques des patients. MÉTHODOLOGIE : Les données sur les indications d’utilisation, tirées du système PharmaNet de la Colombie-Britannique relativement aux prescriptions d’antimicrobiens, étaient liées à l’information diagnostique prélevée dans les dossiers d’honoraires des médecins. Les données de résistance reliées aux isolats urinaires d’E coli provenaient des BC Biomedical Laboratories (qui font désormais partie des LifeLabs Medical Laboratory Services). Les IPR étaient dérivés en multipliant le taux de résistance à un antimicrobien précis au taux proportionnel d’utilisation de cette classe de médicament et en les regroupant entre les classes de médicaments. Des indices de valeur plus élevés indiquaient une plus forte résistance. RÉSULTATS : Les IPR à utilisation adaptée demeuraient stables au fil du temps, à environ 18 % (95 % IC 17 % à 18 %) chez les adultes de 15 ans et plus, et à environ 28 % (95 % IC 26 % à 31 %) chez les enfants de moins de 15 ans. Les chercheurs ont observé des résultats similaires lorsque l’utilisation proportionnelle des médicaments était restreinte à l’année de référence (modèle à utilisation statique). Les tendances en fonction des groupes d’âge laissent supposer une répartition en U, les IPR les plus élevés se produisant chez les enfants de moins de dix ans et les adultes de 65 ans et plus. Dans tous les groupes d’âge, les hommes présentaient un IPR plus élevé que les femmes. CONCLUSIONS : D’après la tendance stable des IPR à utilisation adaptée au fil du temps, les cliniciens adaptent leurs pratiques de prescription pour le traitement des infections urinaires aux profils de résistance locaux. Les résultats en fonction des groupes d’âge révèlent une plus forte probabilité de résistance à la thérapie initiale chez les jeunes enfants et les personnes âgées.
cumulative impact of antimicrobial resistance on the likelihood that a given pathogen will be susceptible to antimicrobial therapy. objective: To derive a DRI for community urinary tract infections caused by Escherichia coli in British Columbia for the years 2007 to 2010, and to examine trends over time and across patient characteristics. Methods: Indication-specific utilization data were obtained from BC PharmaNet for outpatient antimicrobial prescriptions linked to diagnostic information from physician payment files. Resistance data for E coli urinary isolates were obtained from BC Biomedical Laboratories (now part of LifeLabs Medical Laboratory Services). DRIs were derived by multiplying the rate of resistance to a specific antimicrobial by the proportional rate of utilization for that drug class and aggregating across drug classes. Higher index values indicate more resistance. Results: Adaptive-use DRIs remained stable over time at approximately 18% (95% CI 17% to 18%) among adults ≥15 years of age and approximately 28% (95% CI 26% to 31%) among children