32 group whoreceived 175 rads are designated as “Rongelap exposed,” the Rongelap people who received a smaller exposure of 69 rads as “ Ailingnae exposed,"’ and the larger unexposed comparison population of Rongelap as unexposed." Because of the small numberof people in the Ailingnae group, their data were not treated as fully as those for the Rongelap groups, and are briefly summarized in a separate paragraph. The Utirik data are summarized separately also. Because of certain differences noted in age and sex groups between comparisons of mean levels for entire groups, comparisons are also made of age and sex groups. Ages 9 to 15, 16 to 40, and > 40 years for each sex are compared. The hematological data are summarized in Mean 99 Gears) _ creased over the 8-vear levels, and the 10-year 2 2 (—4%) at 9 years, and at 10 years, lower by 9%. Most ofthe difference was due to lower neutrophil levels in the exposed group (see Figure 2.'). a . . 4 4% } ee 72 6 Bars . 2 Tom tit z ® * te het “oY * . . 2.3 - 4 AFTER . 5 . 6 . 7 - 86 ee 9 10 TEARS ELSOSURE Figure 23. Mean neutrophil and white blucd counts of exposed Rongelap peopie from ume of exposure through 10 vears post exposure Stars represent mean values of companson pupulation. 44 ALSTELE "S30 * Figure 26 Neutrophil cou plotted against age. Solid unexposed male populatio a w t MQ "ME 60 neutrophils, ivmphocvtes. and platelets, 1963. had Z 100 -"™ C100SE9 Teme OF wawue OF nTSs.0N noms ~ a ag * - . 2 3 . of ? v 69 AO NEUTS 1074 : 20 © : s ty iF a - 40 : ' a 26 30 bars a . ar) 29 Mh 39 Oart <7 r = ‘a uw __ a) 5 3 40 28 eee TES oD ? a0 7 EID fhe “Ea fos fae NEL TROPHILS oO 20 Figure 24 Cumulative percent distribution curves for _ pont a" SO “ i — ¥ rr ¥ ‘ oyf 7 ' ra a e ‘ - : az LYMPRS 6 Oot i > ‘ sf 4-— oe - 3 . “weet ao a wf t 2c aa / * 90 . a’ eo ao e . 40 s Veo »/ , ‘ “oe o a- mM 2 ‘; af | ~ 6 . -EUMOCYTES — 20 NEYTaOPHILS ac! ow ~ fy! ' i toe a 9 BO . on Br 1 . , 's 3 veys no significant differes red blood counts, hemog ra " o- the accumulative distribud and 25) the differences ara ErytHroporetic ELEMEN ve a elle 1? In the scattergrams( Figury .f fof. ff “48 | with the unexposed groups a a) LEURUCTIES ANU NEUTACPHILS a? — a re i ig 4 = fao- 12% 30 DearS: f ed j é ™ it <@ 60r slightly lower leukocytes than the unexposed le vir. Wi aff 2 levels were higher than those for ether of the two preceding years. The exposed group had only ot S@ Oars: ae @ a6 ~ ~ exposed males than inex NE UTHUPHHL S 6 10 > —_— 09 ene arteaT yon * EXPOSED 4 YEARS OOST EUPOS * JME POSES © ERPOSED, “ME OF eehW ied OF PIRES Sa0iy levels of leukocytes in both exposed and comparison populations at 9 years post exposure were in- Praterets. The plate 10-year surveys both reve NE UTPHie On HU 5 tions and of the various comparison populations ee in 1963 and 12% less in | tess in 1963 and 2% less showed little difference between the exposed and unexposed groups during the 9 and 1-year surveys; however, some individual lymphocyte couns were lowerin the exposed group. Lymphocytelevels are shownin Figures 24, 25, and 30 through 34. since exposure in March 1954. In Appendices 4 and 5 arelisted the individual blood counts for 1963 and 1964. In Appendix 6 basophil counts (Or eer younger age groups ( <40 years). The exposed older age groups ( >40 years) did not share the deficit as much as has been noted in the past (Figures 26 through 29). Lymenocytes. Lymphocyte levels were slightly higher in the exposed and unexposed groups during the 9 and 10-yea_ surveys. [n contrast to the 8-year survey results, the lymphocyte mean levels Tables 18 and 19 and in Figures 23 through 49. In Appendices 1, 2, and 3 are presented summaries of the mean blood counts of the exposed popula- Leuxocytes. Eostsornirs, MONOcy TES, levels of these cells were not between the exposed and u were simular to the levels tn neutrophil deficit was greater in the exposed the exposed and the unexposed, in addition to the are presented. Rongelep Population. Nevtrormits. The neutrophil levels inc-eased slightly at the time of the 9 and 10-vear surveys in both exposed and comparison populations. Ac9 years the neutrophillevels were about 5% lower in the exposed than in the comparison group,butat 10 years they were about 20% lower. Neutrophil levels are shown in Figures 23 through 29. The 20 eee « a0 PLATELETS a :0°* Figure 27) Figure 25. Cumulative percent distribution curves for neutrophils. lymphocvtes, and platelets. 1964. Neutroph males plowed against level of unexposed fem