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Risk Assessment for Aflatoxin B1: A Modeling Approach

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  • Anna H. Wu‐Williams
  • Lauren Zeise
  • Duncan Thomas

Abstract

The data generated by Yeh et al. on hepatitis B virus, aflatoxin, and primary hepatocellular carcinoma (PHC)in Southern Guangxi, China was used to evaluate the cancer potency of aflatoxin. We examined model fits to these data to explore whether hepatitis B virus (HBV)and aflatoxin intake act together to affect PHC rates in an additive, multiplicative, or interactive fashion, using relative and excess risk model forms. Purely additive models fit the data poorly. Fitted models were checked for plausibility by comparing predictions for the U.S. population with actual PHC incidence rates in the United States, and parameter stability was evaluated. The multiplicative relative risk and the interactive excess risk models provided satisfactory descriptions of the Yeh et al. data and U.S. PHC rates. There is about an eight‐fold difference in the potency estimate for aflatoxin under the multiplicative relative risk (5.7 (mg/kg‐day)‐1)and interactive excess risk models (45.6 mg/kg‐day)‐1). The assumptions and limitations of the various models are discussed.

Suggested Citation

  • Anna H. Wu‐Williams & Lauren Zeise & Duncan Thomas, 1992. "Risk Assessment for Aflatoxin B1: A Modeling Approach," Risk Analysis, John Wiley & Sons, vol. 12(4), pages 559-567, December.
    • Handle: RePEc:wly:riskan:v:12:y:1992:i:4:p:559-567
    DOI: 10.1111/j.1539-6924.1992.tb00712.x
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    References listed on IDEAS

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    1. Robert D. Bruce, 1990. "Risk Assessment for Aflatoxin: II. Implications of Human Epidemiology Data," Risk Analysis, John Wiley & Sons, vol. 10(4), pages 561-569, December.
    2. Mohammad S. Hoseyni, 1992. "Risk Assessment for Aflatoxin: III. Modeling the Relative Risk of Hepatocellular Carcinoma," Risk Analysis, John Wiley & Sons, vol. 12(1), pages 123-128, March.
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    Cited by:

    1. J. Bowers & B. Brown & J. Springer & L. Tollefson & R. Lorentzen & S. Henry, 1993. "Risk Assessment for Aflatoxin: An Evaluation Based on the Multistage Model," Risk Analysis, John Wiley & Sons, vol. 13(6), pages 637-642, December.
    2. Robert D. Bruce, 1994. "Response: Risk Assessment for Aflatoxin," Risk Analysis, John Wiley & Sons, vol. 14(6), pages 897-897, December.

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    4. Robert D. Bruce, 1994. "Response: Risk Assessment for Aflatoxin," Risk Analysis, John Wiley & Sons, vol. 14(6), pages 897-897, December.

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