Which of the following variables is not a component of the Gail Model?
A. Age at menarche
B. Number of breast biopsies
C. Age at first live birth
D. Number of live births
ANS: D
The Gail model is a clinical prediction rule used to estimate a patient's risk for breast cancer. The model identifies the relative risk associated with three factors obtained through history: age at menarche, number of previous breast biopsies, and the age at first live birth.
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