Time trends in occupational exposure to chemicals in Sweden: proportion exposed, distribution across demographic and labor market strata, and exposure levels.

A decreasing trend of blood lead levels was reported in lead-exposed industrial workers in the US, showing annual declines of 2–11%, based on data mainly derived from measurements in 1950–2000 ( 33 ).

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A strong trend was noted in transfer from the manufacturing to construction sectors for those exposed to RCS and wood dust ( figure 3 , supplementary tables S1 and S4).

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In workers exposed to diesel exhaust, there was an overrepresentation in trade, but a small trend over time ( figure 3 ).

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