Effects of Age, Sex and Diagnostic X-rays on Chromosome Damage

Abstract
The frequency of micronuclei assayed in lymphocytes obtained from 73 young adults [human] increases significantly with the age, but not the sex, of the donor. The dose of medical X-rays absorbed by the lymphocytes in the 2 yr before the examination has no significant effect on micronucleus frequency, provided the data are adjusted for age. However, a small significant increase in frequency is associated with X-ray examinations that involve the injection of contrast media into the blood.