210
Health Physics
atolls and for the entire Marshallese population. The
realizations used for each of the risk calculations were
obtained by Median Latin Hypercube sampling (Iman
and Shortencarier 1984). For a given sample size, this
method provides more precise estimates of the mean,
median, and 90% uncertainty limits than are obtainable
through simple random sampling.
RESULTS
Cancerrisk estimates are based on 12,175 MI residents
projected to have been born before 1948 and another 12,608
projected to have been born in the years 1948 through 1970,
giving a total exposed population of 24,783. Projected
lifetime numbers of baseline and radiation-related cancers
are shown in Table 4 by organsite, population, and calendar
August 2010, Volume 99, Number 2
time period. Reflecting the general decreasing trend in
exposure levels from the northern atolls of Aulinginae,
Rongelap, and Utrik to more southern latitudes, the atolls of
Ailuk, Kwajalein, Likiep, Mejit, Wotho, Wotje, and
Ujelang (the relocated Enewetak population) were grouped
together in Table 4 as the “mid-latitude” group, while the
atolls of Ailinglaplap, Arno, Aur, Ebon, Jaluit, Kili (the
relocated Bikini population), Lae, Lib, Majuro, Maloelap,
Mili, Namorik, Namu, and Ujae constitute the “southern
latitude” group.
The lifetime projection for baseline cancers of all
sites, excepting non-melanoma skin cancer whichis not
covered by the SEERregistries, totals 10,600 or a little
over 40% of the exposed population. The projected
numberof radiation-related cancers is 170, or 1.6% of the
projected baseline with 90% uncertainty range 0.4% to
Table 4. Projected numbers of baseline cancers and excess (radiation-related) cancers by population group, cancer type, and
time period (uncertainty distributions for excess cancers represented by their means and their 5" and 95" percentiles).
Projected lifetime cancers
from 1948
Population group and cancer
type
Projected cancers 1948-2008
Excess
Baseline
Mean
5%
Projected cancers from 2009
Excess
95%
Baseline Mean
5%
Excess
95%
Rongelap Island and Ailinginae exposed community
Leukemia
044
16
0.3
4.3
0.27
13
0.20
3.7
Thyroid
0.60 12
4.2
21
0.48
95
2.8
18
Stomach
1.8
1.7
0.23
4.9
1.0
0.79 0.10
2.5
Colon
3.1
3.4.
17
11
1.7
25
0.77
5.1
Other solid
28
21
7.0
33
18
16
5.2
27
Rounded total
34
Al
13
74
21
30
9.0
37
Utrik community
Leukemia
1.4
0.34 0.062
1.2
0.77
0.28 0.044
1.0
Thyroid
1.8
44
085
11
1.3
3.0
0.56
8.2
Stomach
5.8
0.30 0.038
0.99
2.8
0.14 0.018
0.39
Colon
9.7
1.0
0.32
2.3
4.6
0.42 0.13
0.93
Other solid
91
65
14
14
49
3.6
0.89
8.7
Rounded total
110
12
2.6
30
58
74
1.6
19
Kwajalein and other mid-latitude atolls*
Leukemia
35
3.1
0.59
8.8
14
25
O41
7.8
Thyroid
46
15
3.0
38
27
10
2.0
26
Stomach
140
2.8
0.36
8.5
44
13
0.16
4.1
Colon
229
3.30
17
12
69
2.3.
0.77
4.8
Other solid
2,190
31
74
66
790
18
AT
38
Rounded total
2,600
37
13
130
940
35
8.1
80
Majuro and other southern latitude atolls,” including Rongelap control population
Leukemia
103
2.3
0.43
6.5
44
19
0.30
5.8
Thyroid
138
20
3.5
52
84
13
2.3
34
Stomach
420
2.0
0.29
5.7
140
0.89 0.13
2.6
Colon
680
4.8
1.6
9.8
220
2.0
0.68
4.5
Other solid
6,500
31
6.9
68
2,500
17
4.6
35
Rounded total
7,800
61
13
140
3,000
34
8.0
82
Entire Marshall Islands population exposed between 1948 and 1970
Leukemia
140
74
1.3
20
59
6.0
0.94
17
Thyroid
190
50
12
120
113
35
7.9
85
Stomach
570
6.7
0.94
20
190
3.1
0.43
9.4
Colon
930
16
5.3
34
300
7.2
24
15
Other solid
8,800
9024
181
3,400
54
16
110
Rounded total
10,600
170
44
380
4,000
105
28
236
Baseline Mean
5%
95%
0.17. 0.30
0.12 2.3
0.80 0.87
14
29
10
49
13
11
0.072 0.59
1.2
3.6
0.12
2.7
0.90
5.9
2.2
7.9
45
21
0.63
0.50
3.0
5.1
42
51
0.016 0.13
0.27
3.3
0.020 0.61
0.16
1.3
046
6.8
0.93 12
0.062
14
0.16
058
29
5.1
21
19
96
160
1,400
1,700
0.62
5.0
15
3.0
13
23
015
10
0.20
09
2.8
5.1
1.2
12
4.3
6.3
28
52
59
54
280
460
0.45
6.7
11
2.8
0.13
12
016
0.92
0.85
18
3.2
53.7
4,000
15
4,800
26
81
74
380
630
5,400
=©6,600
14
15
3.6
93
36
65
2.8
5.2.
33
60
037
2.6
3.9
36
O51 11
29
19
8.6
71
14
140
* Ailuk, Kwajalein, Likiep, Meijit, Ujelang (population relocated from Enewetak), Wotho, and Wotje.
6 Ailinglaplap, Arno, Aur, Ebon, Jaluit, Kili (population relocated from Bikini), Lae, Lib, Majuro, Maleolap, Mili, Namorik, Namu, and
Ujae.