APPS Score (Age, PaO₂/FiO₂, Plateau in ARDS)
APPS score for ARDS outcome (Villar 2016): age, PaO₂/FiO₂ ratio, and plateau pressure at 24 h each scored 1–3 sum to 3–9, banding into low, intermediate, and high mortality tiers.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Age
- 70 years
- PaO₂/FiO₂ ratio
- 90 mmHg
- Plateau pressure
- 32 cmH₂O
Result: APPS 9 — high-mortality tier (8–9).
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Tiers
- Total 3–9; low 3–4, intermediate 5–7, high 8–9. A simple ARDS outcome stratifier, not a ventilator order.
What you enter
- Age
- PaO₂/FiO₂ ratio
- Plateau pressure
How this is calculated
- Inputs
- Age < 47 (+1) / 47–66 (+2) / > 66 (+3); PaO₂/FiO₂ > 158 (+1) / 105–158 (+2) / < 105 (+3); plateau pressure ≤ 27 (+1) / > 27–30 (+2) / > 30 cmH₂O (+3).
Villar J, Ambrós A, Soler JA, et al. Age, PaO2/FiO2, and Plateau Pressure Score: A Proposal for a Simple Outcome Score in Patients With the Acute Respiratory Distress Syndrome. Crit Care Med. 2016;44(7):1361-1369. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.