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Polypropylene production workers and colorectal cancer in Germany: a brief report.
  1. R Kaleja,
  2. L Horbach,
  3. J Amsel
  1. Department of Occupational Medicine, Hoechst AG, Frankfurt/Main, Germany.

    Abstract

    OBJECTIVE--A retrospective cohort study of 640 male polypropylene production workers in Germany was performed to evaluate the reported association between colorectal cancer and polypropylene. METHOD--The follow up period was 1956 to 1990. Expected numbers of cancers were derived from incidence rates adjusted for age and calendar year from the Saarland cancer registry. RESULTS--Three colorectal cancers were identified compared with 4.0 expected (standardised incidence ration (SIR) = 0.75, 95% confidence interval (95% CI): 0.15-2.19). For total cancers there were 27 cases in the cohort compared with 35.4 expected (SIR = 0.76, 95% CI: 0.50-1.11). DISCUSSION--These results do not support earlier reports of a link between polypropylene production and colorectal cancer, but are consistent with a number of recent investigations of polypropylene production workers that have reported no association with risk of colorectal cancer. Due to the small size of this and other similar studies, however, a small to moderate increase in risk cannot be ruled out.

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