Age Group At Exposure Total suTgically yo Proved 2 Number Nodules 2 & Expecte Nodules Expecte Cancers fea Dose Rads redieais—awuuuie At Risk, Risk, (Cancers) 10-6 rad-ly7 20 (-) 25 14 Lancer Risk, 10-6 radly Rongelap In Utero <10 3 194 1 0 0.078 0.026 600 14 1 0.49 0.17 4000 13 (15) 0.73 1N--18 il 2 1 0.84 0.14 1700 20 (22) 3.1 2.1 >18 32 3 2 2.5 0.22 1300 17 (13) 0.71 3.3 All Ages 65 20 4 3.9 0.56 2190 15 (16) 8.0 1.5 1 0 0 0.026 0.0087 610 ~ (-) - - <10 7 2 0 0.18 9.963 1100 22 (-) 11 ~ 10-18 - - - - ~ - (-) - - >18 11 3 0 0.93 0.077 410 17 (-) 27 - All Ages is 5 0 1.1 0.15 700 19 (-) 15 - < 9 0 0.21 0.069 130 - (-) - - <1o 3+ 4 1 1.4 9.47 490 25 (21) 3.9 0.95 10-18 19 3 0 1.5 9.24 220 20 (-) >18 86 e 1 6.7 9.59 170 23 (22 3.9 1.3 All Ages 167 - 15 2 9.8 1.4 280 23 (21) 4.8 9.61 Ailingnae In Utero - Ltirik In Utero 18 All Exposed In Utero - ‘ 12 1 0 0.31 0.10 290 20 (-) 9.9 <10 80 20 2 2.1 0.70 1400 16 (18) 10-18 30 5 2 2.1 0.38 760 20 (22) 5.9 1.2 >18 129 14 3 10 0.80 470 20 (16) 3.3 2.2 All Ages 251 40 6 15 2.1 780 18 (18) 7.1 1.1 10 Aniere were two infants with atrophy of thyroid which were not counted, B Co 80. Cc Assumed to be time between March 1954 and time of surgery. Papsolute Risk = No. of excess cases due to radiatior x 10 6 mean thyroid dose x No. of subjects at risk x mean years at risk 0.65