PIM3 (Paediatric Index of Mortality 3)
Pediatric Index of Mortality 3 (Straney 2013): a logistic PICU mortality model from SBP, pupils, oxygenation (FiO2, PaO2), base excess, ventilation, elective/recovery status, and diagnosis-risk category.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Systolic blood pressure
- 90
- Mechanical ventilation in the first hour
- Yes
- Base excess
- -5
- Diagnosis risk category
- High-risk diagnosis…
Result: PIM3 predicted probability of death: 13.04% (logit = -1.9).
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Use
- an admission mortality model for PICU benchmarking; companion to the pelod2 and psofa organ-dysfunction scores. Not an individual prognosis.
What you enter
- Systolic blood pressure (mmHg)
- Both pupils > 3 mm and fixed
- FiO2 (fraction) — if ventilated
- PaO2 (mmHg) — if ventilated
- Base excess (mmol/L)
- Mechanical ventilation in the first hour
- Elective admission
- Recovery from procedure
- Diagnosis risk category
How this is calculated
- Model
- fixed logistic equation in SBP, pupils, FiO2*100/PaO2, base excess, ventilation, elective/recovery status, and diagnosis risk; death = e^logit / (1 + e^logit).
Straney L, Clements A, Parslow RC, et al. Paediatric index of mortality 3: an updated model for predicting mortality in pediatric intensive care. Pediatr Crit Care Med. 2013;14(7):673-681. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.