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Air Quality Criteria for Lead Volume II of II - (NEPIS)(EPA) - US ...

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AX6-13<br />

Table AX6-2.3 (cont’d). Cross-Sectional Studies <strong>of</strong> Neurocognitive Ability in Children<br />

Reference, Study<br />

Location, and Period Study Description Pb Measurement Findings, Interpretation<br />

Middle East<br />

Al-Saleh et al. (2001)<br />

Saudi Arabia<br />

533 Riyadh, Saudi Arabian girls (6-12 yrs <strong>of</strong> age) were<br />

administered a variety <strong>of</strong> standardized tests including<br />

the TONI, and the Beery VMI. Extensive data were<br />

collected on potentially confounding variables<br />

including sociodemographic variables, early<br />

developmental milestones and child health status.<br />

Blood Pb at time <strong>of</strong> testing<br />

Blood Pb 8.1 (SD 3.5)<br />

µg/dL<br />

Blood Pb levels had no impact on TONI scores but this test<br />

has limited evidence <strong>of</strong> validity in this population.<br />

Significant negative associations were noted between<br />

blood Pb levels and the Beery VMI suggesting an<br />

association between impairment in visual-spatial skills in<br />

Saudi children with blood Pb levels in the range <strong>of</strong> 2.3 to<br />

27.4 µg/dL.

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