Calculator Inputs
Example Data Table
| Age | Family History | BRCA | Dense Breasts | BMI | Activity | Alcohol | Sample Risk Index | Band |
|---|---|---|---|---|---|---|---|---|
| 52 | One First-Degree Relative | Unknown | Yes | 29.4 | 90 min/week | 4 drinks/week | 49.6 | Moderate |
| 38 | None Known | Negative | Unknown | 23.1 | 180 min/week | 0 drinks/week | 13.1 | Lower Weighted Risk |
| 61 | Multiple First-Degree Relatives | Positive | Yes | 32.8 | 30 min/week | 6 drinks/week | 74.5 | High |
Formula Used
This page uses a simplified weighted index. It is designed for education and screening discussion support.
| Factor | Scoring Rule |
|---|---|
| Age | 1 to 20 points by age band. |
| Family History | 0, 5, 10, or 14 points. |
| BRCA Status | 0, 5, or 25 points. |
| Prior Biopsy / Atypia | 0, 6, or 14 points. |
| Dense Breasts | 0, 3, or 7 points. |
| Chest Radiation Before 30 | 0 or 15 points. |
| Hormone Therapy | 0 to 8 points by duration. |
| Alcohol | 0 to 8 points by weekly intake. |
| BMI | 0, 3, 6, or 8 points. |
How to Use This Calculator
- Enter age and sex at birth.
- Select family history and BRCA status.
- Add prior biopsy, breast density, and chest radiation details.
- Choose reproductive history fields when they apply.
- Enter hormone therapy years, alcohol intake, BMI, and activity.
- Click Calculate Risk.
- Review the risk index, band, contribution table, and charts.
- Use the CSV or PDF buttons to save the result.
FAQs
1. Is this a medical diagnosis?
No. It is an educational score based on weighted factors. A clinician should assess symptoms, imaging, genetics, and full history before making decisions.
2. Does a high score mean cancer is present?
No. A high score means the selected factors raise weighted risk in this model. It does not confirm cancer or predict an exact future outcome.
3. Why is BRCA weighted strongly?
Harmful BRCA variants can materially increase risk, so this simplified model assigns them a strong weight. Formal genetics review remains more accurate.
4. Why do exercise and breastfeeding reduce points?
They act as protective credits in this simplified design. The goal is to reflect how some lifestyle or reproductive factors may lower weighted risk.
5. Can this replace the Gail or Tyrer-Cuzick model?
No. This page is simpler. Formal clinical tools include additional calibration, population data, and limitations that this educational version does not reproduce.
6. What should I do if my result is high?
Discuss it with a qualified clinician. They may review family history, prior imaging, symptoms, genetics, and screening timing in more detail.
7. Why are some questions marked not applicable?
Some reproductive history items do not fit every person. The calculator lets you skip those cases while still estimating a weighted risk index.
8. Can I export the results?
Yes. After calculation, use the CSV and PDF buttons to save the summary and factor contribution table for later review.