oes ot Table 12 OQ lodoprotein Levels (IP) in Populations Under Study (pg%) 1966 - 1969 40 F 62 M 7.9 2166 54 M 2146 2119 Av. 3.2 2125 2.5 Age & 813 15 M No. Sex 816 822 19 F 22 M 6.4 1.1 52 M 8.5 835 35 M 2.3 79 833 Av. 7.9 36 M Rongelap people not on thyroxine Age & Sex 40 64 74 34 932 34 F 6.7 956 60 F 6.4 15 M 30 F 3 16 M 3 2 15 36 18 64 32 16M 13 27 19M 21F 1.8 9.2 68 34 17M 23 72 1.3 Subject No. 22 F 22M 36 F 45 F 2.0 10.2 1.0 1.0 4.5 Age & SeX ISM Subtotal IP —s.7 Subject No. 17 IP WM 3.5 3.3 23 19M 59M 60F 3.7 3.4 54 65 i6M 16 F SIM 11 65 M 0.7 1.9 3.5 Av. 4.8 1.7 3.6 Av. 2.9 Av. 3.6 33 19 42 20 61 Total Age & Sex 27M 7 19 F 3.2 7.3 14.5 9.2 Thyroidectomy No thyroid lesions IP F M F F 1.5 843 855 858 914 1532 Subject No. 1.9 7.0 8.1 938 (before surgery ) IP 51 F 33 F 931 With thyroid lesions Orman 2101 2.8 1.9 Subject Sno IP A sa 59 Sex rT 5.8 Age & No. moos me 16 M 16 F 30 F Subject ON ay 8 70 IP 16F 18M 18 F 22M 23 F 1.7 1.3 0.9 3.3 0.9 4.2 1.3 6.7 Subject No. Age & Sex : IP: 17 «18F 29 64 45F 41 21 3* 5* 18 F 16M 16M ¢ L700 130 13. Av. 2.6 OE # “Fe ew 6 & sex 3 Age (1969) No. Rongelap nonexposed et Subject Uurik ete Ailingnae < Nonexposed and low-dose groups (no thyroxine treatment) Av. 2.6 Previous Thyroid Studies nd (“.3 or C3 Ca c= Even before the developmentof thyroid nodules was noted, the evaluation of thyroid status of exposed individuals received considerable attention, > since it was recognized that the slight growthretardation noted in some of the children might be related to radiation effects on that gland. However, on the basis of physical examinations and serum PBI and cholesterol determinations each individual examinedat that time was believed to be euthyroid. It soon became apparentthat the average serum protein boundiodine in the Marshallese of both Rongelap and Utirik was higher than ~ dose from the various iodine isotopesto the child’s gland was about 1000 rads, with a range of 700 to 1400 rads. The glands received an extra 175 rads from external gammaradiation. ~ *Placed in this category because of nearly complete atrophy of the thyroid gland.