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information about Fukushima published in English in Japanese media info publiée en anglais dans la presse japonaise

All's well in Fukushima's paradise (2)

"Prevalence of thyroid cancer for the location groups were 48/100,000 for the highest dose area, 36/100,000 for the middle dose area, and 41/100,000 for the lowest dose area."

http://journals.lww.com/md-journal/Abstract/2016/08300/Comparison_of_childhood_thyroid_cancer_prevalence.15.aspx#

 

 

Abstract: The 2011 Great East Japan Earthquake led to a subsequent nuclear accident at the Fukushima Daiichi Nuclear Power Plant. In its wake, we sought to examine the association between external radiation dose and thyroid cancer in Fukushima Prefecture. We applied a cross-sectional study design with 300,476 participants aged 18 years and younger who underwent thyroid examinations between October 2011 and June 2015. Areas within Fukushima Prefecture were divided into three groups based on individual external doses (≥1% of 5 mSv, <99% of 1 mSv/y, and the other). The odds ratios (ORs) and 95% confidence intervals of thyroid cancer for all areas, with the lowest dose area as reference, were calculated using logistic regression models adjusted for age and sex. Furthermore, the ORs of thyroid cancer for individual external doses of 1 mSv or more and 2 mSv or more, with the external dose less than 1 mSv as reference, were calculated. Prevalence of thyroid cancer for the location groups were 48/100,000 for the highest dose area, 36/100,000 for the middle dose area, and 41/100,000 for the lowest dose area. Compared with the lowest dose area, age-, and sex-adjusted ORs (95% confidence intervals) for the highest-dose and middle-dose areas were 1.49 (0.36–6.23) and 1.00 (0.67–1.50), respectively. The duration between accident and thyroid examination was not associated with thyroid cancer prevalence. There were no significant associations between individual external doses and prevalence of thyroid cancer. External radiation dose was not associated with thyroid cancer prevalence among Fukushima children within the first 4 years after the nuclear accident.

 

 

Comments from the webmaster: There seems to be a mistake in the way the groups were presented in the precedent article

Study draws a blank on thyroid cancer and 2011 nuclear disaster

http://www.asahi.com/ajw/articles/AJ201609100031.html

 

According to the above abstract, it should read:

group 1: 48/100.000

group 2: 36/100.000

group 3: 41/100.000

 

More importantly, what we are talking about here is the possible effect of  external radiation. Has  the dose of internal radiation (inhaled or ingestedby the children) not been taken ito account at all in this study?

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