Figure 11 compiled the individual data calculated for !37Cs for all
Rongelap :esidents and was referenced to June 1, 1957.
The individual maximum
1370. daily activity ingestion rate was approximately 4 times the population
mean valuc.
The standard deviation observed for the adult activity ingestion
rate dist:ibution was 41% of the mean value, 39% of the mean value for young
adults, 48% for adolescents, 38% for children and 54% for infants.
Adolescents
and infants exhibited a broader distribution than adults while children showed
a fractional variation in activity ingestion rate similar to adults.
Breast
feeding versus coconut sap supplements would have contributed to the greater
varia.ion observed in infants.
Adolescents and young adults were the population
subgr «ips which have been observed to move frequently between atolls.
This mo-
bility would lead to greater variations in the daily activity ingestion rates
relat‘ ve to those observed in the more stationary population subgroups.
Figure 12 also exhibited a wave pattern; however, a distinct difference between males and females was indicated.
This difference arose from the use of di-
etary rate constants listed in Table 3 which were derived from urine data for
maie and female residents at Rongelap Atoll.
Its major impact was on the dose
equivalent rate, not on the total dose equivalent; and its effect was to cause
the dose equivalent rate for males to rise and decline more rapidly than for
fomales.
Figures 13a and 136 summarize the individual data for 906, for all
Rongelap residents and were referenced to June 1, 1957.
A bimodal shape was
observed for the distributions which contained both sexes thus reflecting the
difference in the 705, dietary rate constants.
Data from urine bioassay
indicatei that the observed difference between the male and female value for Ke
wae ~ ft significant.
A t-test was peformed between consecutive urine measure13