Estimated absolute risk (%) of developing breast cancer in Korean women by initial and later relative risks, initial age, and years of follow-up.

aThe initial relative risk corresponds to the initial age a.bLater relative risk refers to relative risk at age 50 years for a women who was initially younger than age 50 years. For a woman aged 50 years or later initially, no later relative risk is needed. No later relative risk is needed unless the age at the end of follow-up exceeds 50 years.