Thyroid Cancer and Iodine Intake - Chornobyl NPS Accident -

As shown in the table, there has been a report that the relative risk of thyroid cancer per gray increases in areas where iodine concentration in soil is low and iodine intake is insufficient. Areas around Chornobyl, where the relevant data was obtained, are located inland away from the sea and iodine concentration in soil is low, and people there do not habitually eat seaweed and salt-water fish that are rich in iodine.

Compared to areas around Chornobyl, iodine concentration in soil is higher in Japan as a whole and iodine intake is also higher than in other countries. Accordingly, such data as obtained in areas around Chornobyl is not necessarily applicable in Japan.
(Related to p.99 of Vol. 1, “Relative Risks and Attributable Risks,” and p.128 of Vol. 1, “Iodine”)

• Included in this reference material on March 31, 2013
• Updated on March 31, 2019