Fracture Risk Assessment FRAX Calculator

Compare weighted risk factors, optional T-score input, and clear outputs. Export summaries and reports instantly. Use responsive fields, scenario review, and practical reporting tools.

Calculator Form

Example Data Table

Case Age Sex BMI T-score Major Risk % Hip Risk % Band
Case A 52 Female 26 -0.8 1.3 0.3 Lower relative risk
Case B 66 Female 24.1 -2.2 24.7 7.4 Higher relative risk
Case C 74 Male 23 -2.6 53.5 28.3 Higher relative risk
Case D 83 Female 21.1 -3.1 78 56.8 Higher relative risk

About This Calculator

This page estimates long term fracture probability from structured clinical inputs. It uses age, sex, body size, common bone health risk flags, and an optional femoral neck T-score. The design is useful for screening workflows, education, and quick scenario comparison.

The page keeps the layout simple. Results appear below the header and above the form after submission. Users can compare outputs, review the driver list, inspect the graph, and export a compact summary for records or discussion.

This is an educational calculator. It does not replace clinical assessment, official fracture tools, imaging review, medication planning, or local guideline judgment. It is best used for structured review before a fuller evaluation.

Formula Used

1. BMI

BMI = weight in kg / (height in meters)^2

2. Major fracture score

Major score = baseline + age term + sex term + BMI term + weighted clinical factors + T-score term

3. Hip fracture score

Hip score = baseline + age term + sex term + BMI term + weighted clinical factors + T-score term

4. Probability conversion

Probability = 100 / (1 + e^(-score))

This implementation uses an educational weighted FRAX-style scoring method. It is meant for structured estimation only. It does not recreate the official country-specific probability engine.

How to Use This Calculator

  1. Enter age, sex, weight, and height.
  2. Add the femoral neck T-score if it is available.
  3. Tick each risk flag that applies to the patient.
  4. Press the calculate button to view the summary.
  5. Review the risk graph, driver list, and monitoring index.
  6. Use the CSV or PDF option to save the result.
  7. Compare changes by editing inputs and recalculating.
  8. Use the output as a discussion aid, not a diagnosis.

FAQs

1. Is this the official FRAX engine?

No. This file uses a FRAX-style educational model. It mirrors the common public input structure, but it does not claim to reproduce the official country-specific probability calculation.

2. Can I use the calculator without a T-score?

Yes. Leave the T-score blank. The tool will estimate risk from clinical factors and body size only. Adding the T-score can refine the estimate.

3. Why is age limited to 40 through 90?

The form is designed around the usual public FRAX age window. Keeping that range helps keep the educational estimate closer to common screening use.

4. What does a higher major fracture risk mean?

It means the weighted inputs point toward a greater relative probability of a future major osteoporotic fracture over ten years. It is a screening estimate, not a diagnosis.

5. What counts as previous fracture here?

Use it for a clinically important prior fracture history relevant to bone fragility review. When uncertain, confirm the history before relying on the estimate.

6. Should men and women use the same form?

Yes. The same form works for both. The internal weighting adjusts by sex, age, body size, and other checked risk factors.

7. Why export the result as CSV or PDF?

Exports help with record keeping, case discussion, and quick comparison. CSV is useful for data handling. PDF is useful for printing or sharing a compact report.

8. Can this result guide treatment alone?

No. Medication, imaging, fall history, lab work, and local guidance still matter. Use this page as a structured starting point for review.

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Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.