The contribution of education level to predicting cumulative lead exposure was reduced, in some cases substantially, when occupation was included in models. This suggests that, although there is still an independent contribution of education to cumulative lead exposure, education is to a large degree acting as a surrogate for occupation in predicting cumulative lead exposure. On the other hand, the other demographic factors are not. Thus, specific occupations rather than cruder groupings or none at all should be taken into account when considering likelihood of past lead exposure. These data also suggest that bone lead measurements can capture past occupational lead exposure in community-based populations in which occupational lead monitoring programs may be rare. In our analysis, we found Protective Service Workers to have consistently high bone lead concentrations across bone type and whether we considered multiple occupations or not.
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The mortality data of construction workers were compared first with all workers and then with blue collar workers classified as precision crafts workers, operators, and laborers. Separate PMRs were also provided for white men, black men, white women, and black women. White men who died under the age of 65 had a PMR of , an almost four fold increase risk for death from asbestosis. Cause specific PMRs by occupation were provided for specific occupations. Significantly elevated PMRs for various disorders were observed for all trades. Plumbers, insulation workers, roofers, and boilermakers had PMRs of 1,, 23,, 1,, and 3,, respectively, for asbestosis. Insulation workers also had PMRs of 13, and 2, for cancer of the lung and pleura, respectively.
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Technical Job Descriptions The types of available jobs for men in the s were as varied as the different types of skills and personalities in the men themselves. From agriculture work to business to blue collar to industry and trades, men, as the traditional breadwinners of most of the s, had to find work and maintain their jobs through economic recession, wars, global changes, advances in technologies and the drastic changes in traditional gender roles. Agriculture According to the Bureau of Labor and Statistics, "At the turn of the century, about 38 percent of the labor force worked on farms.