Titre :
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Relating west nile virus case fatality rates to demographic and surveillance variables. (2006)
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Auteurs :
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TACKETT (Julie) : USA. Department of Environmental Health. University of Cincinnati. Cincinnati. OH. ;
CALDWELL (Glyn) : USA. Department of Epidemiology. University of Kentucky. Lexington. KY. ;
CHARNIGO (Richard) : USA. Department of Biostatistics. Department of Statistics. University of Kentucky. Lexington. KY.
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Type de document :
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Article
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Dans :
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Public health reports (vol. 121, n° 6, 2006)
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Pagination :
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666-673
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Langues:
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Anglais
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Mots-clés :
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Virose
;
Infection
;
Virus
;
Mortalité
;
Surveillance
;
Homme
;
Mortalité [démographie]
;
Démographie
;
Etats Unis
;
Amérique
;
Système nerveux [pathologie]
;
Amérique du Nord
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Résumé :
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[BDSP. Notice produite par INIST-CNRS 0IR0xLag. Diffusion soumise à autorisation]. Objective. The purpose of this ecological study was to relate West Nile virus (WNV) human case fatality rates to county-level demographic and surveillance variables, thereby characterizing the populations to which WNV poses the greatest threat. Methods. The authors acquired data on human, avian, and mosquito WNV infections for the 13 states in which there were 100 or more human cases during 2003. The data on avian and mosquito infections were converted into surveillance variables using empirical Bayes methodology. A preliminary logistic regression model was formulated to relate these surveillance variables and demographic variables to case fatality rates. The statistical technique of backward elimination was applied to obtain a final model in terms of the variables most useful for predicting case outcomes. Results. The probability of a fatal outcome depends on the poverty rate for the county in which the infected person lives (p=0.0283), the average temperature (p
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