30
Table 18
Rongelap Thyroid Abnormalities, Age Specific Incidence (1966)*
Nodules
Hvpothvroidism
Total abnormalities
Age at exposure
No. exposed
No.
“
No.
%
No.
% of Group
1-5
13
9
69.2
2
15.4
il
84.6
11-15
16-20
>20
7
3
24
0
0
2
0
0
8.3
-
-
0
0
2
0
0
8.3
6-10
6
4
66.7
~
4
66.7
*In 55 living of onginal 64 Rongelap people in heavily exposed group. One nodule in womanin less exposed group
{not includedin table).
Table 19
Thyroid Abnormalities (Nodules and Hypothyroidism) in Marshallese Populations Examined 1964-1966
Age (1954) < 10 vr
Island group
Estimated
No.
thyroid
examined
Age (1954) 10-19 yr
%
Estimated
No.
dose**
Abnormalities
examined
78.9
0.0
Rongelap
19
I 700-1400
y 175
Ailingnaet
6
£ 275-550
40
Unexposed
(Rongelap and Utirik)
61
Abnormalities
i2
Z 350-600
y 175
0.0
1
f 175-300
0.0
y 69
fF 55-110
y 14
~
Age (1954) 20-40 yr
No.
examined
Rongelap
14
Ailingnaet
4
Estimated
thyroid
0.0
16
0.0
36
No.
Z 160
14.3
[54
y 175
f£ 25-55
Abnormalities examined
0.0
y 14
-
0.0
Age (1954) >40 yr*
To
dose**
Fo
dose**
y 69
Utirikt
thyroid
%
All ages
No.
%
Abnormalities
examined
Abnormalities
10
0.0
55
30.9
25.0
3
0.0
14
7.1
¥ 69
Uurikt
22
£16
4.5
21
4.8
99
2.0
Unexposed
(Rongelap and Utirik)
48
-
0.0
49
6.1
194
15
y id
*Dosage in this group wasthe same as in 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 gammadose received.