Document Detail


Blood lead levels in Toronto children and abatement of lead-contaminated soil and house dust.
MedLine Citation:
PMID:  8629866     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
South Riverdale in Toronto, Canada, underwent a lead-abatement program. In 1988, lead-contaminated soil was replaced at 970 properties, and in 1989, professional housecleaning for lead removal was conducted in 717 households. The effect of "abatement" on blood lead levels in young children was investigated. Data were analyzed from 12 cross-sectional blood-screening surveys that were conducted during an 8-y period in South Riverdale and in two comparison areas. Responses regarding behavioral, household, lifestyle, neighborhood, and environmental factors, all of which were gleaned from associated questionnaires, were also analyzed. Response rates varied between 32% and 75%. During the years between 1984 and 1992, blood lead decreased in all study areas. There appeared to be a minimal blood lead level of 2-3 micrograms/dl for urban Ontario children who were less than 6 y of age. The significant difference between South Riverdale and the control areas disappeared by 1992. Although abatement activity in South Riverdale was associated with an accelerated decline in blood lead levels, it was difficult to distinguish this from effects of decreased Toronto air lead levels or decreased smelter emissions. Within South Riverdale, abatement appeared to be associated with a slower decline in blood lead levels over time, likely the result of selection bias, soil mixing, or recontamination from the smelter. No difference was observed between the separate effects of housecleaning or soil replacement. The findings could neither strongly support nor refute beneficial effects of abatement.
Authors:
P Langlois; L Smith; S Fleming; R Gould; V Goel; B Gibson
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Archives of environmental health     Volume:  51     ISSN:  0003-9896     ISO Abbreviation:  Arch. Environ. Health     Publication Date:    1996 Jan-Feb
Date Detail:
Created Date:  1996-06-25     Completed Date:  1996-06-25     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0212627     Medline TA:  Arch Environ Health     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  59-67     Citation Subset:  AIM; IM    
Affiliation:
Texas Department of Health, Austin, USA.
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MeSH Terms
Descriptor/Qualifier:
Analysis of Variance
Child
Child, Preschool
Cross-Sectional Studies
Dust / adverse effects*
Environmental Exposure
Female
Humans
Lead / blood*
Male
Ontario
Soil Pollutants / adverse effects*
Time Factors
Urban Population*
Chemical
Reg. No./Substance:
0/Dust; 0/Soil Pollutants; 7439-92-1/Lead

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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