Hip Fracture Mortality Calculator

Combine age, sex, labs, cognition, mobility, and comorbidity. Generate transparent risk estimates for safer handovers. Use outputs to guide careful clinician led conversations today.

Enter Patient Details

Formula Used

The page calculates a Nottingham Hip Fracture Score from seven admission factors.

Score points: age 66 to 85 years equals 3 points. Age 86 years or older equals 4 points. Male sex, hemoglobin 10 g/dL or lower, cognition score 6 or lower, two or more comorbidities, institutional residence, and malignancy each add 1 point.

Mortality equation: 30 day mortality percentage = 100 / [1 + e^(5.012 - 0.481 × score)].

The calculator also shows survival percentage as 100 minus estimated mortality.

How to Use This Calculator

  1. Enter age, sex, hemoglobin, cognition score, and comorbidity count.
  2. Select previous residence and malignancy history.
  3. Add fracture type, plan, ASA grade, and mobility for context.
  4. Press the calculate button.
  5. Review the score, mortality estimate, survival estimate, and point table.
  6. Use CSV or PDF export for audit or handover records.

Example Data Table

Case Age Sex Hb Cognition Comorbidities Institution Malignancy Score
Example A 70 Female 12.4 9 1 No No 3
Example B 84 Male 9.8 7 3 No No 6
Example C 91 Male 8.9 5 4 Yes Yes 10

Understanding Hip Fracture Risk

Hip fracture care often needs fast decisions. A mortality estimate can support that work. It should never replace clinical judgment. This page uses the Nottingham Hip Fracture Score approach. The score combines admission details that are commonly available before surgery. It is built for fractured hip repair populations, not healthy screening.

Why the Score Matters

Older adults with hip fractures may have frailty, blood loss, delirium, cancer, or multiple illnesses. These factors change perioperative risk. A structured score helps teams discuss risk in a consistent way. It also gives families a clearer starting point. The number is only an estimate. Local outcomes, surgical timing, anaesthetic review, and rehabilitation resources still matter.

Inputs Used

The calculator asks for age, sex, admission hemoglobin, cognition score, comorbidity count, previous residence, and malignancy history. Age has the largest point weight. Male sex adds risk in this model. Low hemoglobin adds one point. Poor cognitive score adds one point. Two or more major comorbidities add one point. Institutional residence and malignancy also add points.

Interpreting Results

The output shows the total score and an estimated thirty day mortality percentage. It also shows estimated survival. A higher score means higher predicted risk. A low score does not mean no risk. A high score does not mean poor care is futile. It means the patient may need more careful planning.

Clinical Use

Use the result during admission review, orthogeriatric assessment, anaesthetic planning, and shared discussions. Record assumptions clearly. Check that hemoglobin units are correct. Confirm whether cognitive testing was reliable. Count only significant comorbid conditions. If a value is unknown, update the result when better data arrives.

Limitations

Prediction models can drift over time. They may perform differently across hospitals and countries. Individual patients can do better or worse than estimated. This calculator is for education and workflow support. Urgent clinical decisions require qualified medical review, direct examination, and local protocols. Always treat reversible problems and reassess risk after stabilization.

Use the printable export for handover notes. Use the CSV file for audits. Keep patient identifiers out of downloads unless your local privacy policy allows them. Recalculate after transfusion, diagnosis changes, or new delirium assessment. Compare results with senior clinical judgment before surgery.

FAQs

What does this calculator estimate?

It estimates thirty day mortality after hip fracture surgery using admission risk factors. The result is a probability, not a certain outcome.

Can this result replace clinical judgment?

No. It should support discussion only. Clinicians must review the patient, current illness, local protocols, and treatment goals.

Which hemoglobin unit should I enter?

Enter hemoglobin in g/dL. If your lab reports g/L, divide by 10 before entering the value.

What cognition score does the tool use?

It uses a ten point cognition score. Scores of 6 or lower add one point in this model.

What counts as a comorbidity?

Count significant ongoing conditions that affect perioperative risk. Examples include cardiac, lung, kidney, diabetic, neurological, and vascular disease.

Why are fracture type and ASA grade included?

They are included as context fields. They do not change the score calculation in this page.

Can I export the result?

Yes. Use the CSV button for spreadsheets. Use the PDF button for a simple printable record.

Should I store patient names in exports?

Avoid patient identifiers unless your organization allows it. Follow local privacy and documentation policies at all times.

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