counts of all four components with increasing age at the time of radiation. There was no evidence at the 5% level of any sex difference for any of the blood components exceptplatelets, for which the the female count. ‘There was no evidence at the 1% level that any of the two- or three-factor interactions (years, sex, exposed versus nonexposed, age groups) were ] T yO qT T T I T FEMALES (963 PLATELETS « 104 male count wassignificantly lower (1% level) than || significant. For lymphocytes there was evidence at the 5% level of an interaction between exposure and sex, and for neutrophils there was evidence at the 5% level of an interaction between exposure and year. The four-factor interaction was treated as error, an assumption which appeared justified upon examination of the variances. Since these data are being further analyzed, no interpretation as to biological significance of the above interac- 10 20 30 40 50 60 7Or TT . TT TT 60}w To n PLATELETS x IO4 PLATELETS x 1074 LF ATT 30 20 | ott. tt ist, du o8 24 40 56 72 6 | 2 DAYS MO | TIME tt 3 4 AFTER 5 pod 6 7 8 9 10 YEARS a0 30 Figure 37. Platelet counts of exposed Rongelap females plotted against age. Solid line represents mean level of unexposed female population, 1963. tionsis justified at present.” 40 70 AGE (years) rT MALES 1964 | 4 e 50+ | iol 4 EXPOSURE 10 l 20 l 30 l 40 ] 50 60 7O 80 90 AGE (years) Figure 35. Meanplatelet values of exposed Rongelap people from time of exposure through 10 years post exposure. Stars represent mean values of unexposed com- Figure 38. Platelet counts of exposed Rongelap males plotted against age. Solid line represents mean level of parison population. dT T I I J unexposed male population, 1964. 1 yO qT T y | I FEMALES 1964 I oO PLATELETS x 10+ $ MALES 1963 Tt Q 4 w 4 e uJ A lu _ 20 . a 5 ° : 20 rid 20 30 40 J 50 el 60 L 70 1 80 30 AGE (years) Figure 36. Platelet counts of exposed Rongelap males plotted against age. Solid line represents mean level of unexposed male population, 1963. ioUd lo 7] | 20 l 30 40 50 i 60 I re] L 80 90 AGE (years) Figure 39. Platelet counts of exposed Rongelap females plotted against age. Solid line represents meanlevel of unexposed female population, 1964.