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APACHE II Estimate Calculator

Work out apache ii estimate instantly with clear inputs, formula shown and shareable results.

About APACHE II Estimate Calculator

Adds the acute physiology score to the APACHE II age and chronic health points and maps the total onto the published mortality bands.

Formula

APACHE II

Total = acute physiology score + age points (0-6) + chronic health points (0, 2 or 5); maximum 71

Worked example

With the default values below, APACHE II Estimate Calculator returns APACHE II total of 17. Change any input above and every figure here is recalculated in your browser.

Inputs used

Acute physiology scoreaccepts 0–60
12
Ageaccepts 15–110 years
65 years
Chronic health pointsone of No severe organ insufficiency (0), Elective postoperative with severe organ failure (2), Non-operative or emergency postoperative with severe organ failure (5)
No severe organ insufficiency (0)

Results

APACHE II total
17
Approximate hospital mortality
25%
Points from age
5
Severity band
Moderate severity

Step by step

  1. 1Values used
  2. 2APACHE II
  3. 3APACHE II total= 17
  4. 4Approximate hospital mortality= 25
  5. 5Points from age= 5
  6. 6Severity band= Moderate severity

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 whole numbers, 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

Which age points apply?

0 for 44 or under, 2 for 45-54, 3 for 55-64, 5 for 65-74 and 6 for 75 and over.

When should APACHE II be scored?

From the worst values in the first 24 hours of intensive care admission.

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APACHE II Estimate Calculator – Calculate APACHE II total