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pece_annotation_1472845180

tamar.rogoszinski

They calculated the observed/expected (O/E) ratio of thyroid cancer prevalence for residents in Fukushima Prefecture that were below the age of 20. Observed prevalence was calculated by the number of thyroid cancer cases detected by the end of April 2015. The number of detected cases was corrected for screening rate by multiplying the inverse of the age-specific screening rate. The expected prevalence was obtained from another report, which was calulated using a life-table method using national estimates from 2001-10. Age-specific prevalence of thyroid cancer was estimated using the cumulative risk from 2010. The annual percent change of increasing cases of thyroid cancer was taken into account as well.