Health

Pneumonia Severity Index (PSI)

PORT score to guide inpatient vs outpatient management.

Age

Sex

Nursing Home Resident?

Neoplastic Disease?

Liver Disease?

CHF?

Altered Mental Status?

Respiratory Rate ≥ 30?

SBP < 90?

Temp < 35°C or ≥ 40°C?

HR ≥ 125?

pH < 7.35?

BUN ≥ 30?

Na < 130?

Glucose ≥ 250?

Hct < 30%?

PaO₂ < 60 or SpO₂ < 90%?

Pleural Effusion?

PORT / PSI Score

The PSI stratifies CAP patients into 5 risk classes. Class I–II (≤70): outpatient (~0.1–0.6% mortality). Class III (71–90): observe. Class IV (91–130): inpatient (~8.2%). Class V (>130): ICU consideration (~29.2%). The score uses demographics, comorbidities, vital signs, and lab values.