AgainAbility

Stroke Risk

Estimate first-stroke or recurrent-stroke risk using published models and evidence.

For adults aged 30–79 without known cardiovascular disease or prior stroke/TIA.

Select the ? beside any item to learn what it means, where to find it, and exactly how to enter it.

mmHg
mg/dL
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mL/min/1.73m²
%
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Scientific basis

PREVENT, RRE-90, ESRS, and Science Skills references are listed in the deployment package README.

Stroke prevention guide

How to use and interpret a stroke risk assessment

AgainAbility separates first-stroke risk from recurrent-stroke risk because they use different populations, inputs, models, and time horizons. The calculator is designed to make those differences visible and to show the scientific basis behind each result.

What this stroke risk calculator estimates

The first-stroke pathway estimates risk for eligible adults without known cardiovascular disease or a previous stroke or TIA. The recurrent-stroke pathway is for people with a previous ischemic stroke or TIA and reports separate short- and longer-term results.

First-stroke risk

Uses the stroke-specific PREVENT pathway for eligible adults. The result is tied to a stated time horizon and the information entered in the calculator.

Recurrent-stroke risk

Uses recurrent-stroke score strata and published population benchmarks. Some outputs are not precise individual predictions from the present day.

Information used in the assessment

Accurate entry matters. Use recent measurements and confirmed diagnoses. Do not guess about MRI findings, stroke etiology, or laboratory values.

First-stroke assessment inputs

Age, the model's sex category, systolic blood pressure, blood-pressure treatment, total and HDL cholesterol, statin use, diabetes, current smoking, kidney function, body mass index, and optional laboratory values.

Recurrent-stroke assessment inputs

Age and established vascular risk factors are used for the Essen Stroke Risk Score pathway. Optional acute etiology and MRI-report fields can be used for an RRE-90 score when those details are documented by a clinician.

How to interpret a stroke risk result

  • Check the time horizon before comparing percentages. A 90-day value and a 10-year value answer different questions.
  • Check whether the result is a personalized equation, an externally validated score stratum, a population benchmark, or a derived estimate.
  • Use the result to support a prevention conversation, not to start, stop, or change treatment independently.
  • Risk can change as blood pressure, smoking, diabetes, cholesterol, kidney health, medication use, and other clinical factors change.

Factors commonly considered in stroke prevention

A risk estimate is only one part of prevention planning. Clinicians may also consider blood-pressure control, cholesterol, diabetes, smoking, physical activity, kidney health, body weight, medication adherence, atrial fibrillation, vascular disease, and the cause of a previous stroke.

A calculator cannot determine which medication or treatment is appropriate. Discuss modifiable risk factors and an individualized prevention plan with a qualified healthcare professional.

Important limitations

  • The first-stroke pathway is not intended for people with known cardiovascular disease or a previous stroke or TIA.
  • RRE-90 is an acute specialist score that depends on documented clinical, etiologic, and MRI information. Users should not interpret brain images themselves.
  • The Essen Stroke Risk Score stratifies groups and has limited discrimination for precise individual prediction.
  • Longer-term recurrence numbers may be population benchmarks rather than individualized probabilities from today.
  • No online result accounts for every relevant factor, including stroke mechanism, atrial fibrillation, vascular imaging, medication adherence, and changes in treatment.

Emergency warning

Possible stroke symptoms require immediate action

For sudden facial droop, arm weakness, speech difficulty, vision loss, severe imbalance, or another possible stroke symptom, do not wait for a calculator result. Call 911 or the local emergency number immediately.

Review stroke signs and symptoms

Frequently asked questions

What does a stroke risk calculator estimate?

It combines selected health factors with a published risk equation or risk-score framework to estimate risk over a defined period. The result is an estimate, not a diagnosis or a guarantee that a stroke will or will not occur.

Is first-stroke risk the same as recurrent-stroke risk?

No. First-stroke models are intended for eligible people without a previous stroke or transient ischemic attack, while recurrence tools apply after an ischemic stroke or TIA and may use different clinical or imaging information.

Who can use the first-stroke calculation?

The first-stroke pathway is intended for adults aged 30 to 79 who do not have known cardiovascular disease and have not had a previous stroke or TIA. People outside those criteria should discuss an appropriate assessment with a qualified clinician.

Why does recurrent-stroke assessment include more than one time horizon?

Early recurrence and longer-term recurrence are different clinical questions. The page therefore separates short-term estimates or score strata from longer-term population benchmarks instead of treating them as one interchangeable number.

Does a low result mean that no prevention is needed?

No. A lower estimate does not eliminate risk and should not be used to stop medication, delay care, or ignore prevention recommendations. Treatment decisions should be made with a qualified healthcare professional.

What should I do if stroke symptoms are happening now?

Do not use an online calculator. Call 911 or the local emergency number immediately for sudden facial droop, arm weakness, speech difficulty, vision loss, severe imbalance, or another possible stroke symptom.

Scientific sources

Last content review: August 4, 2026. This page is educational and does not replace medical evaluation, diagnosis, emergency care, or individualized treatment.