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

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AX6-35<br />

Table AX6-3.2 (cont’d). Symptoms Associated with Occupational <strong>Lead</strong> Exposure in Adults<br />

Reference, Study<br />

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

Asia (cont’d)<br />

Niu et al. (2000)<br />

China<br />

44 Pb-exposed workers (17 men, 27 women)<br />

from Pb printing houses, mean age 35 (4.9)<br />

and education 9.3 (no SD) yrs and 34<br />

controls (19 men and 15 women), mean age<br />

33 (7.4) yrs and education 9.5 (no SD) yrs<br />

completed the pr<strong>of</strong>ile <strong>of</strong> mood state as part <strong>of</strong><br />

the NCTB. ANCOVA controlling <strong>for</strong> age,<br />

sex and education examined group<br />

differences and linear regression <strong>for</strong> doseresponse<br />

relationship.<br />

Mean blood Pb 29<br />

(SD 26.5) µg/dL<br />

(8 workers blood Pb<br />

exceeded 50 µg/dL)<br />

Controls<br />

Mean blood Pb 13<br />

(SD 9.9) µg/dL<br />

(1 control blood Pb<br />

exceeded 50 µg/dL)<br />

POMS subscales <strong>for</strong> confusion (F = 3.02, p < 0.01), fatigue (F = 3.61,<br />

p < 0.01), and tension (F = 2.82, p < 0.01) were significantly elevated<br />

in the Pb exposed group. Regression analyses found a dose response<br />

(data not shown).

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