Table 17 Summary of Radionuclide Body Burdens of Marshallese, 1961, Obtained by Whole Body Counting Rongelap weet a, a Ma Male Cs?" (mpC,’ke) Exposed Unexposed Ay Z2n"* (mpC,'kg) Exposed Unexposed Age 5-15 Age >15 Age 5-15 Age >15 15.8-£ 1.28 15.71.42 16.022.12 14.21.27 16.31.55 15.91.51 LE.140.95 9.84+0.90 15.8 14.7 16,2 10.4 1.3140.13 1.700.15 1.20+0.08 1.58-0.09 1.34 1.51 1.24 1.42 1.30+0.02 Ay Co"(uC/kg) Exposed 1594145 Unexposed Ay kK” Female 1.4340.07 1G1E11L.1 1.320.15 1274144 U.S, medical team 0.048+0.012 1.280.07 0.015 +0.003 170+ 18.6 152422.6 1S9+11.8 1554+27.3 137+8.83 156 159 137 139 6.43 £1.39 (g/kg) Exposed 2110.10 Unexposed Av Total residual gamma activity (cpm/kg) Exposed Unexposed 2.26+0.09 2.130.007 2.07 £0.07 2.0340.05 1.53+0.07 2.17 2.11 1.94 1.63 1.72 0.05 5.40+0.89 4.504 1.42 20.52.72 20.31.91 9.30 2.53 8.504 2.00 19.82.06 18.0+1.80 2.00 +£0.59 No. of People 1.772£0.11 1.71+0.06 Exposed 10 6 26 11 13 7 20 Total 16 37 20 37 Unex posed 17 7 *Standard error of mean. and age included for comparison. Almost identical amounts of the radionuclide K"° are noted along with large differences in the Cs'** and Zn"levels between the two subjects. The summaryof the average levels of Gs**‘, Zn°°’, K'°, and Co®° deter- mined in 1961 for both the exposed and the non- exposed Marshallese, according to age andsex,is presented in Table 17. The frequencydistribution of values in various groups is shown in Figure 57. Appendix 7 contains the individual values for each subject. Cesium-137 The meanvalue for all groups for body burden of Cs?** was 13.7 mupC/kg body weight. Although ceonmrmem gy emer my ae ee - - a the meanlevels of the exposed areslightly higher than those of the unexposed groups, the two do not differ significantly. Variation within any groupis large, as can be seen from Figure 57 and from the value of the standard error. As expressed here in terms of body weight, Cs'** body burdensin the groups aged >16 and < 16 years do not differ significantly. The meanlevels of Cs’** in females tend to be somewhat lowerthan in males, but the difference does not appearsignificant(Figure 57). Zinc-65 Zn* body burdens per kg body weight appear to be somewhat lowerin the younger population group, but again the differences are notstatisti- 7 A TE TN 8ee oo some gam mm ee meee