15/10/12 23:52:37.55 GzKe+X940.net
この点もとても重要です。
One concern is that the approximately 30-fold increase observed in the number of thyroid cancer cases in external
comparison might be the result of a screening effect. This concern is based on the potential presence of silent thyroid cancer
among children and adolescents in the unscreened regions of Japan. However, the magnitude of the IRRs was too large to
be explained only by this bias. Furthermore, according to the data reported by Fukushima Prefecture,27 positive lymph node
metastases were observed in 40 of 54 cases (74%) operated at the Fukushima Medical University Hospital. This finding
indicates that cancers detected by screening were not at a particularly early stage.