Infectious Disease Respiratory Medicine Emergency Medicine A

PORT Score / PSI for Pneumonia

Pneumonia Severity Index (PSI) for stratifying CAP mortality risk. Patients in classes I–II can be treated as outpatients.

Patient age*(years)

Sex

Nursing home resident

Neoplastic disease

Liver disease

Congestive heart failure

Cerebrovascular disease

Renal disease

Altered mental status

Respiratory rate ≥30/min

Systolic BP <90 mmHg

Temperature <35°C or ≥40°C

Heart rate ≥125 bpm

Arterial pH <7.35

BUN ≥11 mmol/L (≥30 mg/dL)

Sodium <130 mmol/L

Glucose ≥14 mmol/L (≥250 mg/dL)

Haematocrit <30%

PaO₂ <60 mmHg or SpO₂ <90%

Pleural effusion on CXR

References

Fine MJ, et al. A prediction rule to identify low-risk patients with community-acquired pneumonia. N Engl J Med. 1997;336(4):243-250.

Curated clinical cross-links plus same-class fallbacks.

Calculators

Drugs

Pathways

Decision support only — verify against MDCalc, NICE, or your local guideline before clinical use.