Table 2.
Percent of unexposed Marshallese (born before 1954)
with thyroid nodules.
Established (1958)
Age
group
(i954)
<10
10-18
>18
All
group (Roneelap)
tetal
a
2
No. Nods. Carcinoma**
58
29
98
86
3.4
6.9
9.2
=««6..9
1.7
a
1.0
1.1
Added groups*
total
Combined groups
total
2
*
No. Nods. Carcinoma**
%
z
No. Nods. Carcinoma**
1712.3
50
«8.0
194
7.2
415
5.3
0.6
0
0.5
0.5
229
79
292
600
2.6
7.6
7.9
5.8
0.9
0
0.7
0.7
*Added unexposed people of Rongelap, Utirik, Wotje, and Likiep. See Table
1, Appendix I, for island breakdown.
**The carcinomas gay be underestimated since all unoperated nodules were
considered benign for these calculations. Occult papillary carcinomas not
inc luded under carcinoma.
Table 5.
Group
Ronge lap
Observed/expected thyroid nodules.*
Exposure Age
<18
No.
22/1.6
2/0.4
85
8/3.3
2/0.8
>18
7
"
>18
79
<18
Carc inoma**
42
"
Utirik
Total nodules
7/3.5
9/5.7
2/0.3
1/0.6
*Based on unexposed Marshallese prevalence: <18, total nodules 3.92%, carcinoma 1.0%; >18, total nodules 7.9%, carcinoma 0.72%.
*eDoes not include occult papillary carcinomas.
- 60 -