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

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AX6-191<br />

Table AX6-7.2 (cont’d). Key Occupational Studies <strong>of</strong> <strong>Lead</strong> Exposure and Cancer<br />

Reference, Study<br />

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

Europe (cont’d)<br />

Carta et al. (2003)<br />

Sardinia<br />

1972-2001<br />

Cohort design.<br />

918 Pb smelter workers.<br />

Mortality traced from 1972 through<br />

2001.<br />

Standardized mortality ratios computed.<br />

Smelter workers considered exposed.<br />

Job histories also used to categorize<br />

degree <strong>of</strong> exposure based on<br />

environmental and blood Pb<br />

measurements <strong>for</strong> specific<br />

departments and tasks during<br />

1985-2001.<br />

SMR; number <strong>of</strong> cases<br />

Smelter workers as a whole<br />

All cancer 1.01; 108<br />

Gastric cancer 1.22; 4<br />

Lymphoma/leukemia 1.82; 6<br />

Lung cancer 1.21; 18<br />

Highly exposed workers<br />

Lung cancer 1.96 (95% CI: 1.02, 3.68) <strong>for</strong> highest exposure<br />

group, with statistically significant upward trend.<br />

Analyses <strong>for</strong> worker population as a whole supported by<br />

presence <strong>of</strong> dose-response pattern <strong>for</strong> lung cancer based on<br />

estimated exposure. Modest population size, inability to assess<br />

dose-response <strong>for</strong> cancers <strong>of</strong> interest other than lung. No control<br />

<strong>for</strong> smoking or other occupational exposures.

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