MDCalc

PIRO Score for Community-Acquired Pneumonia

Predicts ICU mortality in patients with community-acquired pneumonia.

Predisposition

Comorbitities (COPD or immunocompromised)
Age >70 years

Insult

Bacteremia
Multilobar opacities in chest radiograph

Response

Shock
Severe hypoxemia

Organ dysfunction

Acute renal failure
Acute respiratory distress syndrome

Result:

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Advice
  • No specific management guidelines are linked to PIRO score results.
  • Higher scores correlate with increased mortality, prolonged ICU stay, and extended mechanical ventilation.
  • Results may inform prognosis discussions and guide decisions on treatment setting (e.g., ICU, stepdown, medical ward), aggressive interventions, and adjunctive therapies (e.g., corticosteroids).