Mortality among workers in the diatomaceous earth industry

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      <subfield code="a">Mortality among workers in the diatomaceous earth industry</subfield>
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      <subfield code="a">A cohort mortality study was conducted among workers from two plants in the diatomaceous earth mining and processing industry in California. Diatomaceous earth consists of the skeletal remains of diatoms. Exposure to amorphous and crystalline silica in the form of quartz results from open pit mining and exposure to crystalline silica occurs in the processing of the material. Lung cancer and non-malignant respiratory diseases have been the health outcomes of greatest concern. The main study cohort included 2570 white men who were employed for at least 12 months cumulative service in the industry and who had worked for at least one day during the follow up period, 1942-87. Vital status was ascertained for 91% of the cohort and death certificate information was retrieved for 591 of 628 (94%) identified deaths</subfield>
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      <subfield code="a">British journal of industrial medicine</subfield>
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      <subfield code="t">British journal of industrial medicine</subfield>
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      <subfield code="g">nº 7, July 1993 ; p. 586-597</subfield>
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