Table 3 AgeGroup 10 to 18 Data Summary Number of PersonSecesessctescccccc scene secee esate esseesseretistaresseseses Je Internal Exposure, Person~Rad. cccccccersccesccsersevccsccesssssesesees External Exposure, 18,000 PErSON—Rad«cccccsccccccccsestccetcccsceseesscssuseses 2500. Number of Observed Carcinomasecescsccccscccveceversnccsenccscstiersaseeesese DB Average Years Post-Expoagure to Onset of Carcinoma. .ceacsesseccrssensesces 28 Asaumed Latent Period, Years. .cccccssccccsccsevnsscccssscessessvessecess 9 and 10 Number of Expected Spontaneous Carcimomas....scccccsccscccnssesessccens 0.30 Table 4 Age Group >18 Data Summary Number of POLSONSesscccecccuccccceunccvcccucsscustecceessesuteaceseucesans 120 Internal Exposure, Person~Rads .ccecescccscccccccsccccscccscescetcsesss 48,000 External Exposure, PerSomRad.sccccsccccsscsersssccssasssecccscscssesses 8,000 Number of Observed Carcimomasecscceeceracccesrsereeseeceserereeeeeeeeeerereen G Average Years Post-Exposure to Onset of Carcinomasssrcccescensescccsesees 16 Assumed Latent Period, Yearsecccssccccescccessssesseseseseesssesesees 9 and 10 Number of Expected Spontaneous Carcinotlag...ccceseesccccecsmeccsonsseece Lol Table 5 Risk Coefficients? for Marshall Islanders, 10-Year Latent Period ; Excess Group Age 1954 Number Years Thyroid Total at Risk Cancers Person~Rad Risk Coefftcient <1 85 2.2 120,000 12.2 1.5x107° 10-18 32 2.7 21,000 17.7 7.4x107° >18 120 1.9 56,000 6.2 5.4x107° 237 6.8 200,000 11.3 3.0x107° Total @Thyroid cancers per person-rad-years at risk, based on thyroid dose from internal plus external sources. a m3 Cc } a 20