Table 6
Risk Coefficients? for Marshall Islanders, 5~Year Latent Period
Excess
Group
Years
;
Thyroid
Total
at
Risk
Cancers
Person-Rad
Risk
Coefficient
Age 1954
Number
<10
10-18
85
32
2.2
2.7
120, 000
21,000
17.2
22.7
1.1x1076
5.8x107°
237
6.8
200,000
14.9
2.3x1076
>18
Total
120
1.9
56,000
11.2
3.0x1076
4thyroid cancers per person~rad-years at risk, based on thyroid dose from
internal plus external sources.
Table 7
Estimated Risk Coefficient? for Internal and External Exposure
10-Year Latent Period
5-Year Latent Period
External
Internal
External
Internal
Risk
Risk
Risk
Risk ©
Coefficient
Coefficient
Coeffictent
Coefficient
85
32
120
3.3x107°
3.3x107
1.0x1076
1.4x1078€6)
8.0xL07°
6.1x107°
2,5%1078
2.5x1076
1.3x107°
1.0x107°
6.31076
3.3x107°
237
2.1x107°
4.7x107°
1.9x1076
2.9x107°
Group
Age 1954
<10
10-18
>18
Total
Number
*“Thyroid cancers per person-rad-years at risk.
b
A value of 1.3x107° results when 4.9x107° is used for the external risk
‘coefficient.
26