11 Table 6 Mean Blood Count by Age and Sex for the Exposed and Control Groups Rongelap Ailingnae Utirik WEC(10°) 3-5 >5 8.6 (8)*+1.8 6.9 (54)41.7 12.1 (2) 7.0 (16)+1.6 10.8 (13) +3.5 7.8 (108)+43.2 Neutro (10*) 3-5 4.1 +1. 5.5 Lymph(107) 3-5 3.7 +0.6 5.6 >5 3.7 >5 1.1 2.7 Mono(10?) 3-5 3.9 +0.8 2.6 >5 0.7 1.2 +0.9 +0.4 0.7 Eosin (10? ) 3-5 6.4 2.2 5.3 >5 4.5 3.0 +3.0 3.7 +1.3 +0.6 +0.5 +2.3 +2.7 4.0 +1. 4.4 +18 4.7 15 4.1 3.3 0.7 +15 +1.3 1.4 +0.6 5.8 +7.4 6.2 *#5.5 +2.7 39.5 (18) +8.8 Females > 3 28.1 (33) 46.8 31.2 (11) 46.9 31.2 (67) *+7.3 Hematocrit Males 3-10 >15 Females > 3 35.6 (13)2.4 38.7 (16)+3.2 35.4 (33)2.6 37.5 (2) 40.6(5) £1.5 36.5 (11)+3.2 +0.8 0.7 40.8 (2) 22.4 (5) 438 2.9 #11 +0.4 2.8 +0.9 3.4 0.8 32.0 (9) +£5.6 22.1 (205.3 9.8 (5) +£1.6 6.9 (80)41.5 5.6 Platelets (10° ) Males 3-10 >10 Unexposed Rongelap 4.0 +0.6 +2.6 32.6 (10)7.0 28.3(35) +6.2 — 26.9(40)45.5 37.0 (21) +3.8 40.2 (31) +#2.4 35.9 (68) +2.9 35.6 (17)4#2.4 41.0 (34)+3.1 35.9 (34) 42.4 30.0 (34)+7.7 *Numbers in parentheses refer to numbers of people in age groups. sex.* The hematological data are presented in tabular form in Table 6 and graphically in Figures 7 to 15. The mean ofthree separate absolute blood counts on the individuals was used in obtaining the over-all mean for comparison among varlous groups. WBC. The mean total leukocyte counts were about the samein the exposed and nonexposed Sex *Leukocytes: Platelets: Hematocrits: Age,yr Rongelap Ailingnae Unexposed Rongelap both both M M F <5 >5 <10 >10 all ages 8 36 9 22 33 2 16 2 5 1] 3 80 10 40 34 F ail ages 33 11 34 M M <15 215 12 19 2 5 1? 34 people (Table 6 and Figure 7). Comparison with last year’s counts showsthe leukocytes to have dropped slightly in contrast to the steady increase seen at six months, one year, and twoyearsafter exposure. However, the present control group also shows a correspondingly lower meanthan the control groups of previous years. The numbers of neutrophils wereslightly higher than in the unexposed group in both the >5 and <5-year-old age groups (Table 6 and Figure7). Figure 8 showsthe agedistribution of individual neutrophil counts compared to the mean control level. The counts are seen to be distributed about equally above and below the mean controllevel. Among the exposed people, 9 (14.5%) showed neutrophil counts below 2500, and 15 (17.6%) of the unexposed people showed counts atthislevel. Comparedto last year’s level, the neutrophils have