oe! ] j T . 50 a 45 40 7 35 4 - Lymphocytes. “4 T ' o = 356: ® ~ w SO “tat - s a 25Fr @ UNEXPOSED ¢ 4 e 4 e * 20 * "6 ° + Sr 4 . 10 “4 1 Oo 10 ° I 20 pt x 40 50 J 60 1 70 80 AGE (YR) Figure 39. Individual platelet counts of exposed males plotted against age, 1959. Solid line represents mean Jevel of comparison male population. PLATELETS 11074 55 T T T TT TI 45 a 40 4 35 e discussed below in connection with leukemia.) Platelets, Mean platelet counts in 1959 (Table = UNEXPOSED io L__1 0 Oo 20 ! 30 f J 40 50 AGE (YR) ! 60 4 70. 60 Figure 40. Individual platelet counts of exposed females plotted against age, 1959. Solid line represents mean level of comparison female population. look I | L_ CUMULATIVE PERCENT 80 7 COUNTS (DAYS 26-30)" h— qT PERIOD qT | T (- 4 a od Le 4 60F ~| 40 = + a O SYRS POST EXPOSURE 2 & 20 iz oO ' 5 | 3 ! Zi _t 29 ! 37 COMPARISON POPULATION 4 ! 45 _/ 53 i 6l PLATELETS x107 4 Figure 41. Cumulative distribution curve, Rongelapplatelets, 1959. eA ee ee eee The mean level of the lympho- cyte counts (Table 21 and Figure 35) in 1959 showed a slight increase over the 1958 values. The mean levels were about the same in the exposed and unexposed populations. A scatlergram (Figure 36) of the age distribution of the lymphocyte counts in the exposed group for the first time showed about an equal distribution in the exposed population of counts above and belowthe mean levels of the unexposed people. The cumulative percentage distribution curvesof the exposed and unexposed (Figure 37) showed close approximation. The 1960 absolute lymphocyte countsalso showed a decrease corresponding to the WBC decrease, the mean dropping from 4000 in 1959 to 2700 in 1960. Eosinophils and Monocytes. Eosinophil and monocyte counts showeda slight increase in 1959 over the 1958 levels and wereslightly greater in the exposed population. As noted in 1958, a large percentage of the population had eosinophil counts >5% of the total white count (1959, 44% of exposed population and 39% of unexposed; 1960, 46% of exposed, no data on unexposed). The levels of eosinophils and monocytes in 1960 were not very different from the 1959 levels. (Basophils are 69 21 and Figure 38) wereslightly lower than in 1958 in both the exposed and unexposed populations. The meandeficit in platelets in the exposed population was about the sameas last year ( — 9.3% for the males and —11.3% for the females). Age distribution scattergramsfor the individual platelet counts in both males and females of the exposed population showed more counts belowthan above the unexposed mean curve (Figures 39 and 40). This was also borne out by comparison of the cumulative percentage distribution curves for the exposed and unexposed populations: the latter showed continued displacement to theleft (Figure 41). The significance of the continued platelet depression in the exposed population is also indicated bythe finding of levels <( 250,000 in 37% of the exposed group but in only 24% of the unex. DOE ARCHIVES _ posed. Erythropoetic Function. Because of technical difficulties, the hematocrit levels were not con- sidered reliable for the 1959 survey. Samples containing ethylenediaminetetraacetic acid as an anticoagulant appeared to have a lower hematocrit than untreated venous orfinger stick blood.