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American Journal of Epidemiology Vol. 148, No. 7: 693-703
Copyright © 1998 by The Johns Hopkins University School of Hygiene and Public Health

ORIGINAL CONTRIBUTIONS

Occupational Chlorophenol Exposure and Soft Tissue Sarcoma Risk among Men Aged 30-60 Years

Jane A. Hoppin1, Paige E. Tolbert1,2, Robert F. Herrick3, David S. Freedman4, Bruce D. Ragsdale5, Karen R. Horvat2 and Edward A. Brann4

1 Department of Environmental and Occupational Health, Rollins School of Public Health, Emory University Atlanta, GA.
2 Department of Epidemiology, Rollins School of Public Health, Emory University Atlanta, GA.
3 Environmental Health Department, Harvard School of Public Health Boston, MA.
4 Centers for Disease Control and Prevention Atlanta, GA.
5 Department of Pathology, University of Arizona Medical School Tucson, AZ.

Received for publication September 26, 1997. Revision received February 27, 1998. To evaluate the association of chlorophenol exposure with soft tissue sarcoma risk Independent of phenoxyherbicide exposure, the authors analyzed data from the Selected Cancers Study, a population-based case-control study that included 295 male soft tissue sarcoma cases, aged 32–60 years, from eight population-based cancer registries and 1, 908 male controls. Chlorophenol exposure was assigned using both an intensity and a confidence estimate by an industrial hygienist based on verbatim Job descriptions. Seventeen percent of the jobs rated as high intensity involved wood preservation, while 82% involved cutting oils. Soft tissue sarcoma risk, modeled using conditional logistic regression, was significantly associated with ever having high-intensity chlorophenol exposure (odds ratio = 1. 79, 95% confidence interval 1. 10–2.88). A duration response trend was evident among more highly exposed subjects (p for trend < 0. 0001). For subjects with 10 or more years of substantial exposure, the odds ratio was 7. 78 (95% confidence interval 2. 46–24.65). These results suggest that chlorophenol exposure independent of phenoxyherbicides may increase the risk of soft tissue sarcoma. Because of the large number of machinists in the exposed group and the complex composition of cutting fluids, it is possible that another exposure involved in machining is responsible for the observed excess risk. Am J Epidemiol 1998; 148: 693–703.

chlorophenols; occupational exposure; oils; sarcoma, soft tissue


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