Which of the following is NOT a general conclusion of epidemiological studies of irradiated human populations? A.
Question:
Which of the following is NOT a general conclusion of epidemiological studies of irradiated human populations?
A. Most regulatory and advisory committees recommend that risk estimates derived from acute exposures be reduced by a Dose and Dose-Rate Effectiveness Factor (DDREF) of approximately 1.5 - 2.0 in order to apply them to chronic, low dose and low dose-rate exposures
B. Analyses of the Japanese A-bomb survivor data indicate that radiation risk is dependent on age at exposure, time since exposure, and gender
C. For solid tumors in A-bomb survivors, a linear-quadratic fit to the data is significantly better than a linear fit
D. Studies of populations living near nuclear power plants, or of populations exposed to elevated background radiation, usually do not provide a direct quantitative estimate of risk.
E. Based on the BEIR VII estimates, human exposure to ionizing radiation accounts for a lifetime excess cancer risk (both fatal and non-fatal) of roughly 1% per 100 mSv
Expert Answer:
C For solid tumors in Abomb survivors a linearquadratic fit to the data is significantly better than ... View the full answer
