46 OFRFECES were sufficient J ns ck oo neeiber te adlew afl sanmipie ro be taken in rapid) ecessoom. ne: tine os tee vals were rugtd}y comrade 4.2. Methods ot Treating Data. Control Groups Pre-Bxpostre Broom commt. were vot avaiiatle on the exposee Marshallese or Amercans hence the mdividuais could ret be used as thet own controls, onoorder co estimate the -everins of the hematologie ~espense iowas necessary th establish contro: groups os fam parible as ies sible with respect ta ige. pace. ses. baeke@rouns and habits. A contre’ reap ot 155 Marsha lese froni Mayero il comparable Wit: Control Grrenp respieet to age Me wey ek posure Group Powas cotuimed duriig the viitia observation period * For comparison wath she exposed Americans, brood comnts were -lome of approxunately 35 Vinereaiy omen oon uty at Kwajalein. Adi owhe did not been on ety i the tropics for more than 2 montus were es cluded, since the exposed Nmerienans fad heey in the area for that seriod of time before ex posure. Inaddition, -everar wile were cecently associated cluded. with radiowetive materiiis «ere os The resulting -:nailer group at 67 ou. used as the Kway Aurertcin control ure ap Data from tie ‘contra eroup \ WTR 3, amined to determine tae ie ied ses dependences of the several hemitoloer ai cfeternmiciitioarns To obtain valid: comipari-ons wieba ane aoene the various exposire eronps, Oye ue ine PN dependencies nored feo the contre TPOUps Were taken into acco! Vithoueh eseh ineiisaediin inall groups was ste ed hematologienlly, those Marshallese wit serious dong standing liseases were omitted from the aralyes. "A second Majuro atoil romben sro op o FR Coan rob sprang. ia A totalof ts. Marshallese Poon were obtamed hurine the 6 month medic ii restirvey While data from !tiese individuals are viven ou ‘his repre rhey He Nok Spee for COMparisons become the resurvey oP oa ireastes pide c re| os A1sy KADTIAT ION ‘rom, Creodpe A and two from control Group B here onutted on this basis. fr the tellowing descriptions and compariorsof che muta. findings in the exposed groups re frecuently expressed in ternis of percent of le approprate age and sex control group. It -aenld be noted, however, that in observational ~tnehes of this kind. wndnaien fuetors could aasehidry account for part of the differences noted Soren the control and PP POSMPE POU PS PEN ' ean tt nassifle qredsirox pepe furkten to se- oun parole cantpal grou ps, Tn addition, it cus not possible to obfam more than a single dood simp on each control inedividiad, For These rensons. statistical tests of significance vere appbed miunty to time changes within an oSposure group, and not to ditferences between enteol ind exposure cramps. bor the purpose if detecting significant changes in the hematoovtcadl pattern, nonparametric tests (1. e.. statiscent tests for which if ms not necessary to specify the finetronal distribution of the variate under were need ¢2-7). The advantages of MOnparametrie methods have been summarized study) V Moses (mh, Hematological Findings, General [N Tapre ti are shewn for control group A, by bee oid sex. the meno values for the total white, eoteopatle. Iyinphocs te iad platelet counts, as -elloas for the jeniataerit, The vce and sex orencde Wi ise] for comparisons among exmoOstre zroups is shown in Table 4.2. In this nreakdewn the ave and sex dependencies noted tor the Marshallese control groups were taken Nto account insofar as was practicable. It -honid be nured that the Group B control values able #1) agreed closely with the Group uA ontrel date To allow additional comparison herweer effects on children and adults, the neuPropatle counts were arbitrarily separated into he ase rroups used for the (vmphocvte counts. Vionoevres snd eosmophies were broken down “yo onto the same age groups. The age and