Table 1: Individual external dose group, mean external dose, converted thyroid dose, thyroid cancer and non-thyroid cancer cases. Incidence, incidence odds ratio, and relative risk compared to the extrapolated risk at zero-dose in the second-round screening.

Individual external Dose Group

Mean external dose

mSv

Converted thyroid dose

Gy

Thyroid cancer

Non thyroid cancer

Total examinee

Incidence / 104

Incidence Odds ratio (95%CI)

Relative risk (95%CI)

≥ 2 mSv

2.57

0.0197

5

7803

7808

6.40

2.7 (1.0, 7.4)

4.7 (1.7, 12.9)

1~2mSv

1.5

0.0115

16

37953

37969

4.21

1.8 (0.9, 3.6)

3.1 (1.5, 6.3)

< 1 mSv

0.5

0.0038

15

63188

63203

2.37

1(Ref.)

1.7 (0.9, 3.6)

0 mSv

0

0

 

 

 

 

 

1 (Ref.)

Sum/Average

 

 

36

108944

108980

3.30