What is the pneumonia severity index (PSI) for the risk stratification of bacterial pneumonia?

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

The PSI, also known as the PORT score (for the study by which it was validated), is a prediction rule for mortality based on characteristics derived from cohorts of patients hospitalized with pneumonia. [39] For each of the various characteristics, a predetermined value of points is assigned. In a retrospective cohort comparison of different predictive models applied to HCAP, the PSI had the highest sensitivity in predicting mortality. However, alternative tools, including the IDSA/ATS, SCAP, and SMART-COP (mentioned below), are considered easier to calculate. [37]


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