Breast Cancer Risk Calculator for Africans

This risk calculator was developed and validated using data of about 4000 women in Nigerian Breast Cancer Study (NBCS), a case-control study conducted in Ibadan, Nigeria. The NBCS Risk Calculator is an interactive tool to estimate a woman's risk of developing invasive breast cancer up to age 80 for African women. This calculator is not applicable to women younger than age 20 or who have previous diagnosis of breast cancer.” You can use the online NBCS Risk Calculator on this webpage or you can download the standalone NBCS Risk Calculator App for Windows here.

1. What is your current Age?

2. At what age did you have your first menstrual period?

3. Has a doctor ever told you that you had benign breast diseases, such as a non-cancerous cyst or a breast lump?

4. Did any of your first degree relatives (mother, sisters and daughters) ever have a breast cancer?

5. Have you ever consumed any alcoholic beverages, such as beer, wine, or local gin at least once a week for 6 months or longer?

6. How many children do you have?

7. For how many months in total have you breast-fed all your children?

8. What’s your height now in cm?

9. What’s your weight now in kilogram?

Five Year Risk

Ten Year Risk

Lifetime Risk

Average Five Year Risk

Average Ten Year Risk

Average Lifetime Risk

Age	Individual Risk	Population Average Risk