30
Table 18
Rongelap Thyroid Abnormalities, Age Specific Incidence (1966)*
Nodules
Age at exposure
No. exposed
No.
a)
13
9
11-15
7
0
6-10
6
16-20
>20
5
24
Hypothyroidism
Total abnormalities
Ge
No.
%
No.
69.2
2
15.4
11
4
66.7
0
2
0
8.3
-
0
-
-
-
~
% of Group
84.6
4
66.7
0
2
0
8.3
0
-
0
*In 55 living of original 64 Rongelap people in heavily exposed group. One nodule in womanin less exposed group
(not included in table).
Table 19
Thyroid Abnormalities (Nodules and Hypothyroidism) in Marshallese Populations Examined 1964-1966
Age (1954) <C10 yr
' Island group
Rongelap
Ailingnaet
Estimated —
thyroid
dose **
No.
examined
-
Uurikt
No.
examined
78.9
12
f 350-600
y 175
0.0
f 175-300
y 69
0.0
{
25-55
0.0
y
14
f 700-1400
y¥ 175
6
f 275-550
y 69
0.0
l
f 55-110
0.0
16
y
14
61
-
0.0
Age (1954) 20-40 yr
i
No.
examined
Estimated
thyroid
dase**
Estimated
thyroid
dose**
%o
Abnormalities
19
40
Unexposed
(Rongelap and Utirik)
Age (1954) 10-19 yr
36
-
0.0
Age (1954) >40 vr*
%
No.
Abnormalities examined
%
Abnormaliues
All ages
%
Abnormalities
No.
examined
%
Abnormalities
Rongelap
14
Z 160
y 175
14.3
10
0.0
55
30.9
Ailingnaet
4
{54
25.0
3
0.0
14
7.4
7 69
Utrikt
22
116
y 14
4.5
21
4.8
99
2.0
Unexposed
(Rongelap and Utirik})
48
-
0.0
49
6.1
194
1.5
*Dosage in this group was the sameasin the 20 to 40-year group.
**{= Dose from 8 and y radionuclides; y =dose from external y radiation.
tIn estimating the thyroid doses to the Ailingnae and Utirik exposed group it was assumed that such doses were
proportional to the thyroid doses of the Rongelap exposed group. based on relative whole-body gamma dosereceived.