Table 2.
Percent of unexposed Marshallese (born before 1954)
with thyroid nodules.
Established (1958)
group (Rongelap)
Added groups*
Combined groups
’
4
No. Nods. Carcinoma**
&.
4
No. Nods. Carcinoma**
total
Age
group
(1954)
hs
%
No. Nods. Carcinoma**
total
total
<10
58
3.4
1.7
171
2.3
0.6
229
2.6
0.9
10-18
>18
All
29
98
86
6.9
9.2
6.9
0
1.0
L.l
50
194
415
8.0
7.2
5.3
0
0.5
0.5
79
292
600
7.6
7.9
5.8
0
0.7
0.7
*Added unexposed people of Rongelap, Utirik, Wotje, and Likiep.
See Table
1, Appendix I, for island breakdown.
*kThe carcinomas may be underestimated since all unoperated nodules were
considered benign for these calculations.
ine luded under carcinoma.
Table 3.
Group
Ronge lap
"
Utirik
"
Observed/expected thyroid nodules.*
Exposure Age
<18
>18
<18
>18
Occult papillary carcinomas not
No.
42
44
85
79
*Based on unexposed Marshallese prevalence:
Total nodules
22/1.6
7/3.5
8/3.3
9/5.7
2/0.4
2/0.3
2/0.8
1/0.6
<18, total nodules 3.9%, carci-
noma 1.0%; >18, total nodules 7.9%, carcinoma 0.7%.
*kDoes not include occult papillary carcinomas.
- 60 ~
Care inoma**