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Influence of Exposure Duration on Radiation-Induced Morbidity Among Liquidators of the Consequences of the Accident at the Chernobyl Nuclear Power Plant

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Retrospective cohort study reports decreased radiation risk over time in heart disease, suggesting unique radiation effects.

A sixfold decrease in relative radiation risk per dose was found for heart disease with longer exposure durations.
The linear relative radiation risk model showed significant results for both SOLID (p<0.001) and HEART (p<0.001) cohorts.
Excess relative radiation risk per 1 Gy was 0.67 for SOLID cohort and 0.66 for HEART cohort.
No significant dependence on exposure duration was noted for the incidence of solid malignant neoplasms.

Korelo et al. (2025) studied this question.

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