Medical Diagnostics & Clinical Scoring

PSI/PORT Score for Pneumonia Severity

Calculate the Pneumonia Severity Index (PSI) to predict 30-day mortality in community-acquired pneumonia and determine if inpatient admission is required.

PSI Score
60
Risk ClassII
30-Day Mortality0.6%

Calculated locally in your browser. Fast, secure, and private.

Clinical Overview

The Pneumonia Severity Index (PSI), often referred to as the PORT score, is a comprehensive risk stratification tool. It is widely considered the most rigorously validated tool for predicting 30-day mortality in community-acquired pneumonia.

Pathophysiology & Evidence

The PSI accounts for 20 distinct variables. It heavily weights age and gender, and then adds specific penalties for underlying organ dysfunction (e.g., heart failure, renal disease) and acute physiological collapse (e.g., extreme tachypnea, severe acidosis, hypoxia).

Formula Breakdown

Score = Demographics + Comorbidities + Physical Exam Findings + Lab Results

Patients are stratified into Risk Classes I through V. Classes I and II have a mortality rate <1% and are treated as outpatients. Class V carries a mortality rate up to 27% and requires ICU admission.

Frequently Asked Questions

The Pneumonia Severity Index (also known as PORT score) predicts the 30-day mortality risk for patients with community-acquired pneumonia.

PSI uses 20 variables and is more complex but more highly sensitive for identifying low-risk patients who can be safely discharged. CURB-65 uses only 5 variables.

Related Calculators in Medical Diagnostics & Clinical Scoring

A-a Gradient Calculator

Try It Now

ABCD2 Score for TIA

Try It Now

ABSI (Burn Severity Index)

Try It Now

Absolute Neutrophil Count (ANC)

Try It Now

AIMS (Abnormal Involuntary Movement Scale)

Try It Now

Aldrete Score for Post-Anesthesia Recovery

Try It Now