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2005 National Healthcare Quality Report

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Postoperative pneumonia events

Measure Source

Centers for Medicare & Medicaid Services (CMS), Medicare Patient Safety Monitoring System (MPSMS).


2.27 Percent surgical discharges with postoperative pneumonia events, United States, 2002 and 2003.

Data Source

  1. CMS, MPSMS, inpatient medical records: for abstracted data related to the index hospital stay.
  2. CMS Medicare Administrative Data: used to identify a major surgical procedure and used for 30-day post-procedure mortality.


All discharges from the MPSMS sample that had 1 or more of certain surgical procedures identified as part of the Surgical Care Improvement Project who did not have pneumonia prior to the procedure.


The subset of the denominator with a diagnosis of postoperative nosocomial pneumonia.


Postoperative nosocomial pneumonia is determined by evidence in the medical record of a new infiltrate, consolidation, or cavitation noted on chest x-ray, and documentation of physician diagnosis of postoperative pneumonia.

In order to attain greater consistency between 2002 and 2003 data, the analytic approach used to produce these tables differs from earlier years of the NHQR.

The criteria determine a postoperative pneumonia adverse event differ between 2002 and 2003 due to differences in the data elements collected.

For more detailed information regarding the Surgical Care Improvement Project go to

Mechanical adverse events associated with central vascular catheters (CVCs). Postoperative venous thromboembolic events.


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