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Pneumonia Severity Index
The Pneumonia Severity Index (PSI) is a tool for assessing severity of community-acquired pneumonia, and predicting 30-day mortality.
- I (No comorbidity, exam or investigation findings) - 0.1% mortality
- II (<70) - 0.6% mortality
- III (80-90) - 0.9% mortality
- IV (100-130) - 9.3% mortality
- V (>140) - 27% mortality