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