韓国で甲状腺癌が増えている。女性で1999年に6.3が、2007年には25.2（たぶん1000人対）。なぜか。
Cancer Statistics in Korea: Incidence, Mortality and Survival in 2006-2007 （ http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2908777/pdf/jkms-25-1113.pdf ）より引用。
One notable aspect is the sharp increase (25.7% annually) in
the incidence of female thyroid cancer. As diagnostic techniques
for thyroid cancer have become more sensitive, such as the advent of ultrasound and fine-needle aspiration, the detection of
subclinical disease has become possible. Therefore, the increased incidence of thyroid cancer might reflect improved diagnostic techniques for previously undetected disease, rather than a
true increase in the occurrence of thyroid cancer (12, 13).
要は、診断技術の進歩のためであろう、ということ。
こちらも参考になる。
韓国におけるがん対策の現状報告
http://www.mhlw.go.jp/shingi/2010/03/dl/s0311-8p.pdf
Current Status of Thyroid Cancer Screening in Korea: Results From a Nationwide Interview Survey
http://www.apocp.org/cancer_download/Volume12_No7/1657-1663%20c%206.1%20Mi%20Ah%20Han.pdf
ONLINE ANALYSIS > BREAKPOINT ANALYSIS
http://www-dep.iarc.fr/WHOdb/graph10_sel.asp
