Pneumonia Severity Index (PSI/PORT)
30-day mortality class for community-acquired pneumonia, to guide site of care.
Inputs
0 of 2years
SexUsed by the equation
Nursing home resident
Neoplastic disease
Liver disease
Heart failure
Cerebrovascular disease
Renal disease
Altered mental status
Respiratory rate 30 or higher
Systolic BP below 90
Temperature below 35 °C or 40 °C or higher
Pulse 125 or higher
Arterial pH below 7.35
BUN 30 mg/dL or higher
Sodium below 130
Glucose 250 mg/dL or higher
Hematocrit below 30%
PaO₂ below 60 mmHg or SpO₂ below 90%
Pleural effusion
Patient values are shared with every calculator.
When to use
- Adults with community-acquired pneumonia.
Pearls and pitfalls
- ATS/IDSA 2019 prefers PSI over CURB-65 for site-of-care decisions.
- Classes I–II: outpatient; III: brief observation; IV–V: admit.
Why use
The best-validated pneumonia mortality model.
Age (women − 10) plus points for comorbidities, exam, and labs