30 Table 18 Rongelap Thyroid Abnormalities, Age Specific Incidence (1966)* Nodules Hvpothvroidism Total abnormalities Age at exposure No. exposed No. “ No. % No. % of Group 1-5 13 9 69.2 2 15.4 il 84.6 11-15 16-20 >20 7 3 24 0 0 2 0 0 8.3 - - 0 0 2 0 0 8.3 6-10 6 4 66.7 ~ 4 66.7 *In 55 living of onginal 64 Rongelap people in heavily exposed group. One nodule in womanin less exposed group {not includedin table). Table 19 Thyroid Abnormalities (Nodules and Hypothyroidism) in Marshallese Populations Examined 1964-1966 Age (1954) < 10 vr Island group Estimated No. thyroid examined Age (1954) 10-19 yr % Estimated No. dose** Abnormalities examined 78.9 0.0 Rongelap 19 I 700-1400 y 175 Ailingnaet 6 £ 275-550 40 Unexposed (Rongelap and Utirik) 61 Abnormalities i2 Z 350-600 y 175 0.0 1 f 175-300 0.0 y 69 fF 55-110 y 14 ~ Age (1954) 20-40 yr No. examined Rongelap 14 Ailingnaet 4 Estimated thyroid 0.0 16 0.0 36 No. Z 160 14.3 [54 y 175 f£ 25-55 Abnormalities examined 0.0 y 14 - 0.0 Age (1954) >40 yr* To dose** Fo dose** y 69 Utirikt thyroid % All ages No. % Abnormalities examined Abnormalities 10 0.0 55 30.9 25.0 3 0.0 14 7.1 ¥ 69 Uurikt 22 £16 4.5 21 4.8 99 2.0 Unexposed (Rongelap and Utirik) 48 - 0.0 49 6.1 194 15 y id *Dosage in this group wasthe same as in the 20 to 40-year group. **?—= Dose from 8 and y radionuclides: y =dose from external y radiation. tIn estimating the thyroid doses to the Ailingnae and Utirik exposed group it was assumed that such doses were proportional to the thyroid doses of the Rongelap exposed group, based on relative whole-body gammadose received.