Leal-Escalante CR, Baltazar-Reyes MC, Lino-González M, Palazuelos-Rendón E, Meneses-González F

Language: Spanish
References: 32
Page: 377-381
PDF size: 95.69 Kb.

ABSTRACT

Objective: To describe the relationship between blood lead levels (BLL) and poor school performance.
Material and methods: A cross-sectional study was carried out in 1996 among 792 schoolchildren aged 7-14 years, who attended the outpatient units of five pediatric hospitals of Mexico City. BLL was measured together with lead exposure and academic performance.
Results: Reported BLL and geometric means (GM) were 8.6 µg/dL and 7.7 µg/dL, respectively. The main source of exposure was the use of glazed pottery (difference of use =–1.182; p = 0.000). Among schoolchildren who failed any school year, GM of the BLL was 8.1 µg/dL, compared with children who did not fail (GM = 7.6 µg/dL; p = 0.240). The risk of failing a school year between the 1st and 3rd grade with a BLL greater than 10µg/dL was 1.73 (p = 0.012, IC 95% 1.13-2.66) and from 1st to 4th grade was 1.62 (p = 0.021, IC 95% 1.07-2.46).
Conclusions: Blood lead levels, among other conditions, may contribute to the failure in school performance observed in the children participating in this study.

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