2. Birth Defects,Risks_ eee Table 3 gives the calculations for the estimates of birth defects. B. RISK ESTIMATES BASED ON BEIR-III Table 4 gives risk estimates based on BEIR-III risk coefficients. These were calculated for comparpiion purposes only and was not used in the Bikini book. The highest estimates for cancer risk result from using the linear relative risk model and are about the same as those given in Table-2-for=the-relative-ciskmodel_—.The-towestestimatesresutt—From the-Vanear—quadratit Table 2 for the relative risk model. The lowest estimates result from the linear-quadratic absolute risk model and are slightly less than those for the absolute model in Table 2. Thus, as far as estimates of cancer risk are conceited, those obtained using risk coefficients from BEIR-I are in the same general range as those obtained using risk coefficients from BEIR-III. Risk estimates for birth defects obtained using the risk factor from BEIR-I gives values about three times those obtained using the upper value of the range of risk factors given in BEIR-III. If BEIR-III risk factors for bith defects represent a more enlightened assessment of this potential consequence of radiation exposure than the factor taken from BEIR-I for overall health defects, then the estimates Given in the Bikini book may be conservative by a factor of three.