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The Linear No-Threshold Model of Low-Dose Radiogenic Cancer: A Failed Fiction.
Charles W Pennington1, Jeffry A Siegel2
1Executive Nuclear Energy Consultant, Alpharetta, GA, USA.
Dose-Response : a Publication of International Hormesis Society
|February 23, 2019
Summary
The linear no-threshold (LNT) model for low-dose radiation cancer risk is not supported by evidence from atomic bomb survivor data. Analysis suggests a threshold model is more credible for low-dose radiation exposure and cancer incidence.
Area of Science:
- Radiation biology and epidemiology
- Cancer risk assessment
- Radiation protection standards
Background:
- The linear no-threshold (LNT) model is a long-standing assumption for low-dose, radiogenic cancer risk.
- Its scientific validity, particularly at low doses, has been a subject of ongoing debate.
- Regulatory frameworks heavily rely on the LNT model for radiation protection.
Purpose of the Study:
- To critically evaluate the evidence supporting the LNT model using the Radiation Effects Research Foundation's Life Span Study (LSS) data.
- To identify uncertainties and flaws in the LSS data and analyses that underpin LNT model support.
- To assess the validity of the LNT model for low-dose radiation exposure and radiogenic cancer.
Main Methods:
- Re-analysis of the 2017 update of the Radiation Effects Research Foundation's Life Span Study (LSS) cohort data.
- Examination of analyses concerning solid cancer incidence in relation to radiation dose.
- Identification of data inconsistencies, missing causalities, and reliance on imputed or flawed modeling.
Main Results:
- The latest LSS analyses of solid cancer incidence do not scientifically support the LNT model.
- Significant uncertainties and data inconsistencies were found in the LSS dataset and its interpretation.
- The study's reliance on imputed data and flawed modeling further undermines the LNT model's validity.
Conclusions:
- The LNT model is not scientifically valid for assessing low-dose radiation exposure and radiogenic cancer risk.
- Evidence from the LSS cohort suggests a threshold model is a more credible representation of the dose-response relationship.
- Re-evaluation of radiation protection policies based on a threshold model is warranted.
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