Evolution of endemic goiter in the Valea Jiului area after 30 years of iodine prophylaxis.

After 30 years of iodine prophylaxis the incidence of goiter in the Valea Jiului area was reassessed. A number of 7,892 pupils aged 7-16 years were examined, of whom goiter was found in 32%. Before iodine prophylaxis started the incidence was 91.