The association between occupation and tuberculosis. A population-based survey.

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Abstract
There has been increasing interest in the potential association between occupation and the risk of tuberculosis. Therefore, we analyzed occupational information collected on all patients with clinically active tuberculosis in 29 states from 1984 to 1985. Census data were used to estimate the number of persons in each of the occupations. Information on employment and occupation was ascertained for 9,534 (99%) of the working age (16 through 64 yr) tuberculosis patients. The overall case rate of tuberculosis in this age group in the study areas was 8.4 per 100,000 persons, which was slightly lower than the national rate of 9.3 per 100,000 persons. As a group, health care workers had rates of tuberculosis similar to the general population (standardized morbidity ratio [SMR]: 1.0; 95% CI: 0.9 to 1.1). However, elevated rates were observed for inhalation therapists (SMR: 2.9; 95% CI: 1.2 to 6.0), and lower-paid health care workers (SMR: 1.3; 95% CI: 1.1 to 1.5). Elevated rates were also noted for funeral directors (SMR: 3.9; 95% CI: 2.2 to 6.1) and farm workers (SMR: 3.7; 95% CI: 3.4 to 4.1). These data suggest that even in communities with relatively low rates of tuberculosis certain occupations may be associated with an elevated risk.

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