D2 counts at 11 years (7.4 10° in the exposed and 7.3 X 107 in the unexposed). Differential counts showed neutrophils and lymphocytes to have very nearly the same mean level for exposed and unexposed Rongelapese at 11 years. Graphic treatment of these elementsis presented in Figures 49 through 54. The similarity of counts between the two groupsis probably best seen in the cumulative percent distribution curves (Figure 55). The levels of eosinophils, monocytes, and basophils were not remarkably different between the exposed and unexposed groups and were similar to the levels in past surveys. Platelet counts at 11 years were about the same in the exposed and unexposed in both males and females (Figures 55 through 58). The closeness of counts in the two groupsis best seen in Figure 55. Erythropotetic function appeared to be about the same in exposed and unexposed groups based on red cell counts and hematocrits at 11 years (see Figures 59 through 64). During the 12-year survey, counts were done only on the exposed group, and no comparison with unexposed was done because of annual variability in counts. However, the hematological findings at 12 years in the exposed group are not qT |: x 7 °o ' a t x | - 3 oat z ' ° e 1.0 e tg z qu VS é e a no W eo So ° G98 x + -* }. Ly ‘ —< 24 a0 oas5 ~ o wb tet Pt 56 726 1 234 5 67 8 9 ION 2 MO YEARS TIME AFTER a 20 L 30 l 40 1 50 AGE (YEARS; ! 60 L 70 ‘ B80 90 Figure 51. Neutrophil counts of Rongelap expcsed females plotted against age. Solid line represents mean level of unexposed female population, 1965. + ’ e e 1 4 eh Et-+ 45 NEUTROPHILS ! ° . 20 2 6 a | 4| . “2 LEUKOCYTES 2 4 | n> 80 _ 4 OPTI TT Ta TTT eT TTTT e° I 7.0 2 z a if FEMALES (965 EXPOSURE | T T | Figure 49. Mean neutrophil and white blood counts of Rongelap exposed people from time of exposure through T T T T oT MALES ‘965 | 12 years post exposure. Stars represent mean values of comparison population. LYMPHOCYTES « 10°° oTTT TTT an ie0 of = ww 2 =x a o i fr 2 uw = bg sb 2|f*yteese le jE & ~ eee” ol it tidtt os 9 24.640) «#56 Bee Oars MO TIME AFTER 34 8 6? | 69 11e YEARS EXPOSURE Figure 50. Mean lymphocyte counts of Rongelap exposed people from time of exposure through |2 years post exposure. Stars represent mean values of comparison population. | 20 I 30 jo 50 60 AGE (YEARS) i 70 ! 80 9G Figure 52. Neutrophil counts of Rongelap exposed males plotted against age. Solid line represents mean level of unexposed male population, 1965.