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Allergy Risk Score Calculator

Work out allergy risk score instantly with clear inputs, formula shown and shareable results.

About Allergy Risk Score Calculator

Reports the published familial atopy risk ranges: about 10 to 15 percent with no affected parent, 20 to 40 percent with one, and 40 to 80 percent with both, higher when both share the same condition.

Formula

Familial atopy risk

No affected parent 10-15%; one affected parent 20-40%; both affected 40-60%; both with the same manifestation 50-80%

Worked example

With the default values below, Allergy Risk Score Calculator returns Midpoint of the published risk range of 30.0%. Change any input above and every figure here is recalculated in your browser.

Inputs used

Parents with atopic diseaseone of Neither, One parent, Both parents
One parent
Both parents share the same conditionone of Yes, No
No
Affected siblingone of Yes, No
No

Results

Midpoint of the published risk range
30.0%
Published range
20% to 40%
Risk band
Moderately increased risk
Affected first-degree relatives
1

Step by step

  1. 1Values used
  2. 2Familial atopy risk
  3. 3Midpoint of the published risk range= 30.0
  4. 4Published range= 20% to 40%
  5. 5Risk band= Moderately increased risk
  6. 6Affected first-degree relatives= 1

Assumptions and limits

  • The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 1 decimal place, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.
  • This is an estimate for general information and not professional medical advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

Frequently Asked Questions

Does family history predict which allergy?

Only loosely. A child inherits a tendency to atopy that may present as eczema, asthma or allergic rhinitis.

Can allergy be prevented?

Early introduction of allergenic foods and eczema control reduce food allergy risk in trials, though family risk remains.

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