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

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AX6-219<br />

Table AX6-8.2 (cont’d). Effects <strong>of</strong> <strong>Lead</strong> on Immune Function in Adults<br />

Reference, Study<br />

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

Africa<br />

Anetor and Adeniyi<br />

(1998)<br />

Nigeria<br />

NR<br />

Design: cross-sectional cohort<br />

Subjects: adult male “Pb workers” (n = 80),<br />

mean age, 36 yr (21–66) and reference<br />

subjects (n = 50), mean age 37 yr (22–58).<br />

Outcome measures: serum IgA, IgG, and<br />

IgM; lymphocyte count<br />

Analysis: comparison <strong>of</strong> outcomes measures<br />

in workers and reference group, linear<br />

regression, principal component analysis<br />

Blood Pb (µg/dL) mean<br />

(SE):<br />

Pb: 53.6 (0.95)<br />

Reference: 30.4 (1.4)<br />

Significantly lower (p < 0.05) serum IgA, IgG, and total blood<br />

lymphocyte levels; significant associations and interactions between<br />

blood Pb and serum total globulins (note high blood Pb levels in<br />

reference).

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