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Titre du document / Document title

Tijuana childhood lead risk assessment revisited: Validating a gis model with environmental data

Auteur(s) / Author(s)

GONZALEZ Elisabeth J. (1) ; PHAM Patrick G. (2) ; ERICSON Jonathon E. (2) ; BAKER Dean B. (3) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Orange County Health Care Agency, Divisions of Environmental Health and Disease Control & Epidemiology, 2009 E. Edinger Ave., Santa Ana, California 92705, ETATS-UNIS
(2) Department of Environmental Analysis, University of California, Irvine, Irvine, California 92697-7070, ETATS-UNIS
(3) Center for Occupational and Environmental Health, University of California, Irvine Irvine, California 92612, ETATS-UNIS

Résumé / Abstract

The objective of this research was to determine the spatial distributions of childhood lead poisoning and soil lead contamination in urban Tijuana. The Bocco-Sanchez model of point-source emissions was evaluated in terms of validity and reliability. We compared the model's predicted vulnerable populations with observed cases of childhood lead poisoning in Tijuana, identified fixed point sources in the field, and analyzed 76 soil samples from 14 sites. The soil lead results were compared to the blood lead analyses performed on Tijuana children whose blood lead levels were ≥10 μg/dL, who reported that they did not use lead-glazed ceramics for cooking or storing food (n = 63). Using GIS, predicted vs observed risk areas were assessed by examining spatial patterns, including the distribution of cases per designated risk area. Chi-square analysis of expected vs observed values did not differ significantly at the p = 0.02 level, showing that the model was strikingly accurate in predicting the distribution of subjects with elevated blood lead. Results reveal that while point sources are significant, other sources of lead exposure are also important. The relative public health risk from exposure to lead in an urban setting may be assessed by distinguishing among sources of exposure and associating concentrations to blood lead levels. The results represent an iterative approach in environmental health research by linking environmental and human biomarker lead concentrations and using these results to validate an environmental model of risk to lead exposure.

Revue / Journal Title

Environmental management    ISSN  0364-152X   CODEN EMNGDC 

Source / Source

2002, vol. 29, no4, pp. 559-565 (22 ref.)

Langue / Language

Anglais

Editeur / Publisher

Springer, New York, NY, ETATS-UNIS  (1976) (Revue)

Mots-clés anglais / English Keywords

Soil pollution

;

Heavy metal

;

America

;

Central America

;

Human

;

Mexico

;

Urban area

;

Modeling

;

Spatial variation

;

Geographic information system

;

Sanitary surveillance

;

Risk factor

;

Risk analysis

;

Epidemiology

;

Child

;

Contamination

;

Pollution source

;

Lead

;

Mots-clés français / French Keywords

Pollution sol

;

Métal lourd

;

Amérique

;

Amérique Centrale

;

Homme

;

Tijuana

;

Mexique

;

Zone urbaine

;

Modélisation

;

Variation spatiale

;

Système information géographique

;

Surveillance sanitaire

;

Facteur risque

;

Analyse risque

;

Epidémiologie

;

Enfant

;

Contamination

;

Source pollution

;

Plomb

;

Mots-clés espagnols / Spanish Keywords

Polución suelo

;

Metal pesado

;

America

;

America central

;

Hombre

;

México

;

Zona urbana

;

Modelización

;

Variación espacial

;

Sistema información geográfica

;

Vigilancia sanitaria

;

Factor riesgo

;

Análisis riesgo

;

Epidemiología

;

Niño

;

Contaminación

;

Fuente polución

;

Plomo

;

Localisation / Location

INIST-CNRS, Cote INIST : 17139, 35400010799378.0090

Nº notice refdoc (ud4) : 13639175



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