What does PSI Class I mean?

Class I patients are ≤50 years old with no comorbidities or abnormal exam findings. They have a 30-day mortality <0.1% and can be treated as outpatients.

At what PSI class should a patient be admitted?

Class III patients may be briefly observed or admitted; Class IV and V patients require inpatient care, with Class V often needing ICU-level treatment.

Pneumonia Severity Index (PSI/PORT)

Stratifies community-acquired pneumonia patients into five risk classes (I–V) using demographic factors, comorbidities, physical exam findings, and laboratory values to guide inpatient vs. outpatient management.

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Pneumonia Severity Index (PSI/PORT)

Frequently Asked Questions

What does PSI Class I mean?

At what PSI class should a patient be admitted?