Figure 11 cOmpiled the individual data calculated for 1!3/’cs for all
Rongelap :esidents and was referenced to June 1, 1957.
The individual maximum
137s daily activity ingestion rate was approximately 4 times the population
mean value.
The standard deviation observed for the adult activity ingestion
rate distiibution 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-‘on 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
reia=' 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
male 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
females.
”
Figures 13a and 136 summarize the individual data for 90... 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 905. dietary rate constants.
Data from urine bioassay
indicate] that the observed difference between the male and female value for Ke
was ~)t significant.
A t-test was peformed between consecutive urine measure13