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

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AX6-96<br />

Table AX6-4.2 (cont’d). Renal Effects <strong>of</strong> <strong>Lead</strong> in the Occupational Population<br />

Reference, Study<br />

Location, and<br />

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

Asia (cont’d)<br />

Ong et al. (1987)<br />

Singapore and Japan<br />

Study date not<br />

provided<br />

Wang et al. (2002b)<br />

Taiwan<br />

Study date not<br />

provided<br />

209 Pb workers (51 females).<br />

30 control workers from research staff.<br />

Renal outcomes = BUN, serum creatinine, calculated<br />

creatinine clearance, and urinary NAG.<br />

229 Pb battery workers, including 109 females.<br />

Renal outcomes = BUN, serum creatinine, serum<br />

uric acid.<br />

Multiple linear & logistic regression.<br />

Adjustment <strong>for</strong> age, gender, smoking, alcohol ingestion,<br />

milk ingestion.<br />

Mean blood Pb<br />

42.1 µg/dL (males)<br />

31.9 µg/dL (females)<br />

Urine Pb also measured.<br />

Mean blood Pb<br />

67.7 µg/dL (males)<br />

48.6 µg/dL (females)<br />

Blood Pb correlated with BUN(r = 0.16; p < 0.01),<br />

serum creatinine (r = 0.26; p < 0.001) and creatinine<br />

clearance (r = −0.16; p < 0.01). Blood Pb associated<br />

with NAG after adjustment <strong>for</strong> age (method not<br />

specified).<br />

Higher NAG in exposed compared to controls when<br />

stratified by categorical age.<br />

Strengths = sample size.<br />

Limitations = statistical analysis - lack <strong>of</strong> adjustment,<br />

urinary NAG not adjusted <strong>for</strong> urine dilution.<br />

∃ (95% CI) <strong>for</strong> blood Pb in model <strong>of</strong> BUN, after<br />

adjustment <strong>for</strong> Pb job duration/age = 0.062<br />

(0.042, 0.082).<br />

∃ (95% CI) <strong>for</strong> blood Pb in model <strong>of</strong> uric acid, after<br />

adjustment <strong>for</strong> gender and weight = 0.009<br />

(0.001, 0.016).<br />

Blood Pb not associated serum creatinine.

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