Table 3.

Predicted thyroid cancer risk (mean and 95 % confidence interval) in the Fukushima Prefecture: baseline and attributable to radiation exposure for thyroid doses of 50 and 20 mSv assumed for the most exposed population groups

Average thyroid dose (mSv)	Thyroid cancer	Thyroid cancer risk (%) for different periods after exposure
		10 years	20 years	50 years
–	Baseline	0.055 (0.006; 0.14)	0.23 (0.027; 0.58)	2.2 (0.27; 5.3)
20	Attributable	0.0057 (0.0002; 0.025)	0.021 (0.0007; 0.081)	0.13 (0.005; 0.40)
50	Attributable	0.014 (0.0004; 0.063)	0.053 (0.002; 0.20)	0.32 (0.011; 1.0)