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The Fremantle lead study part 2.

Robin Guttinger¹, Elaine Pascoe, Enrico Rossi

¹Princess Margaret Hospital for Children, Fremantle, Australia. robin.guttinger@health.wa.gov.au

Journal of Paediatrics and Child Health

|December 17, 2008

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Blood lead levels (BLLs) in Fremantle pre-schoolers significantly decreased from 1993 to 2005. This decline is attributed to the phasing out of leaded petrol, with ongoing monitoring recommended for at-risk groups.

Area of Science:

Environmental Health
Pediatric Health
Toxicology

Background:

A 1993 study identified elevated blood lead levels (BLLs) in 25% of Fremantle pre-schoolers (≥10 µg/dL).
Lead exposure in children poses significant neurodevelopmental risks.

Purpose of the Study:

To compare BLLs in Fremantle pre-schoolers between 1993 and 2005.
To identify contemporary risk factors for elevated BLLs in this population.

Main Methods:

Recruitment of pre-schoolers (0-5 years) in Fremantle during 2005 from hospital and community settings.
Collection of demographic, environmental, and behavioral data via questionnaires.
Determination of BLLs using the same methodology as the 1993 study.
Statistical comparison of 1993 and 2005 BLL data, including multivariate linear regression to control for confounders.

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Main Results:

No participants in 2005 had BLLs ≥10 µg/dL.
The geometric mean BLL in 2005 (1.83 µg/dL) was significantly lower than in 1993 (6.82 µg/dL), even after controlling for demographic and behavioral differences.
Factors associated with higher BLLs in 2005 included Aboriginality, home renovation presence, short home occupancy (<6 months), and proximity to main roads (<200m).

Conclusions:

A significant decline in pre-schooler BLLs in Fremantle between 1993 and 2005 is evident.
The reduction in BLLs is likely linked to the phase-out of leaded petrol.
Future research should focus on monitoring high-risk groups for lead exposure.