*** Chapters 10-11

Question 1

What is the time interval between irradiation and the appearance of a malignancy called?

Answer 1

The latent period.

Question 2

What is the relative risk model?

Answer 2

The natural risk model assumes that the effect of radiation is to increase the natural incidence (of cancer) at all ages subsequent to exposure by a given factor.

Question 3

What is the absolute risk model?

Answer 3

The absolute risk model assumes that radiation induces a “crop” of cancers over and above the natural incidence unrelated to it.

Question 4

What is the time dependent relative risk model?

Answer 4

The time dependent relative risk model assumes that the excess incidence of cancer was assumed to be a function of dose, the square of the dose, age at exposure, and time since exposure. For some tumors, gender must be added as a variable - for example, in the case of breast cancer.e