Lifetime risk is very dependent on the age of the patient. An older patient with a lot of risk factors will have a lower lifetime risk than a younger patient with no risk.
Percent of patients at lifetime risk of >=20% by decade. This shows that high lifetime breast cancer risks are much more common in younger than older patients, as younger patients have many more years of risk ahead of them. (Polubriaginof F et al. Implications of following the guidelines for genetic testing and MRI use for breast cancer. ASCO 2014)