What are the mortality rates for each class of the pneumonia severity index (PSI)?

Updated: Sep 30, 2020
  • Author: Justina Gamache, MD; Chief Editor: Guy W Soo Hoo, MD, MPH  more...
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Answer

The combined total points make up the risk score, which stratifies patients into 5 PSI mortality risk classes, as follows:

  • 0-50 points = Class I (0.1% mortality)

  • 51-70 points = Class II (0.6% mortality)

  • 71-90 points = Class III (0.9% mortality)

  • 91-130 points = Class IV (9.3% mortality)

  • More than 130 points = Class V (27% mortality)


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