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July 13, 2026Journal of Radiological ProtectionOpen Access

A study of threshold-like behavior in low-dose radiation risk using improved statistical evaluation methods and implications for further investigation

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Authors

HKHiroto KawakamiTYTsugio YokoyamaHMHideo Maki

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Overview

Randomized trial investigates low-dose radiation risks in epidemiological studies, suggesting potential threshold effects.

Key Points

  • The primary aim is to evaluate the appropriateness of statistical methods for assessing low-dose radiation risks, particularly questioning the linear no-threshold model.
  • Applied improved statistical procedures to the Radiation Effects Research Foundation's Life Span Study (LSS-2009) dataset.
  • Excluded individuals with unknown smoking status and varied upper boundaries of the low-dose range while using fixed baseline coefficients.
  • Derived baseline estimates solely from non-exposed groups.
  • The analysis suggests that the excess relative risk coefficient changes sign within a specific dose range, indicating possible threshold-like behavior.
  • Findings support the need for alternative analytical perspectives in the evaluation of low-dose radiation risks.
  • Encourages greater availability of datasets and collaborative scientific exploration for refined conclusions.

Cite This Study

Kawakami et al. (2026) studied this question.

synapsesocial.com/papers/6a547f6d475c38bf615a51ffhttps://doi.org/10.1088/1361-6498/ae890f
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Re‐Examining the Applicability of the Linear No‐Threshold ( LNT ) Theory in Radiation Protection for Very Low Doses2026
  2. 2Replace the Linear No-threshold Model with a Risk-informed Targeted Approach to Radiation Protection2024 · 1 citations
  3. 3A Revised System of Radiological Protection Is Needed2024 · 5 citations
  4. 4Suggested Approaches on Communicating to the Public Implications of the Linear No-Threshold (LNT) Dose Response Model and the Fallacy That “There Are No Safe Levels of Radiation Exposure”2026
  5. 5Questioning the Linear No-Threshold Model (LNT): Lessons From Hiroshima/Nagasaki and Fukushima2025