FIG
Table 6. The minimumrisks (at the 5% ors
significance level) of death due to radiation-induced leukaemia (ICD 204-207) or
from any formof cancer (ICD 140-239) by a survey covering 214 272 in-service and ex-workers in the age range 16-65 years.
Scale using eqn (6). Also showing the 95% confidence interval (one-sided) on the value of the risk if the observed differonce
betieen the control and the exposed are as in columns F of tables 2 and 3. Where the observation time is less than shown
necessaryin table 5, the lowerlimit is negative but for physical reasons it is put to zero. Column6 and 8 showthe residual
probability that the risk is not positive finite
2
®
.
Minimum detectable risl
{per 108 man rads)
Leukaemia
Leaving rate
5%
10%
.
95% confidence values of risk (per 10° man rads)
sll cancers
52%
.
All cancers
10%,
Observation
time (jars)
a%
Probability
of R= 0
10%
Risk
Probability
of R= 0
Risk
1
129
162
$00
1 042
40%
0-900
44%
0-1 142
25
50
100
26
18
13
32
23
16
160
113
80
208
Lai
10-4
15%
73%
20%
0-260
0-213
20-180
21%
13%
3-7%
0-308
0-247
0-204
10
4}
51
253
329
269/,
0-353
31%,
0-429
“ja punpssiay “Por
S