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  • Title: Risks of biliary tract cancer and occupational exposures among Shanghai women textile workers: a case-cohort study.
    Author: Chang CK, Astrakianakis G, Thomas DB, Seixas NS, Camp JE, Ray RM, Gao DL, Wernli KJ, Li W, Fitzgibbons ED, Vaughan TL, Checkoway H.
    Journal: Am J Ind Med; 2006 Aug; 49(8):690-8. PubMed ID: 16830349.
    Abstract:
    BACKGROUND: Biliary tract cancer (BTC) is a relatively rare malignancy worldwide. Little is known about potential etiologic contributions of occupational exposures. METHODS: The associations between occupational exposures to textile dusts and chemicals and BTC are investigated in a cohort of 267,400 women textile workers in Shanghai, China. A nested case-cohort analysis of 162 BTC cases diagnosed during 1989-1998 was conducted with a reference subcohort of 3,188 workers. Exposures to workplace dusts and chemicals were reconstructed by linking complete work history data with a job-exposure matrix (JEM). Hazard ratios (HR) and dose-response trends were estimated by Cox proportional hazards modeling modified for case-cohort design. RESULTS: An elevated risk of > or = 1-year employment in maintenance jobs (HR 2.92, 95% CI: 1.48, 5.73) with a significant trend by duration is observed. Excess risk was also found for > or = 20 years exposure to metals (HR 2.50, 95% CI: 1.09, 5.72). CONCLUSIONS: Long-term exposure to maintenance work and metals in the textile industry may have increased BTC risk in this population.
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