Patient Safety Data Source

Healthgrades uses Medicare inpatient data from the Medicare Provider Analysis and Review (MedPAR) database and Patient Safety Indicator software from the Agency for Healthcare Research and Quality (AHRQ) to calculate event rates for 13 patient safety indicators plus one patient safety event count. Specifically:

  • 2015: Centers for Medicare and Medicaid Services for years 2011 through 2013. Updated 4/8/2015.
  • 2014: Centers for Medicare and Medicaid Services for years 2010 through 2012. Updated 4/7/2014.
  • 2013: Centers for Medicare and Medicaid Services for years 2009 through 2011. Updated 4/6/2013.

About Patient Safety Indicators

Patient safety indicators are serious, potentially preventable complications that occur during a patient’s hospital stay.

Healthgrades patient safety ratings look at 14 types of serious, potentially preventable complications. Thirteen of the 14 indicators are measured as rates (observed and expected number of events). The 14th indicator—foreign object left in patient’s body during a surgery or procedures—simply lists the number of events that occurred.

For a description of how each rating or count is calculated, see Healthgrades Patient Safety Ratings and Patient Safety Excellence Award™ Methodology.

Healthgrades translates patient safety indicators from the Agency for Healthcare Research and Quality (AHRQ, shown in parentheses below) to a simplified description as listed here.   

  • Death following a serious complication after surgery (Death Rate Among Surgical Inpatients With Serious Treatable Complications)
  • Death in procedures where mortality is usually very low (Death Rate in Low-Mortality Diagnosis Related Groups)
  • Pressure sores or bed sores acquired in the hospital (Pressure Ulcer Rate)
  • Collapsed lung due to a procedure or surgery in or around the chest (Iatrogenic Pneumothorax Rate)
  • Catheter-related bloodstream infections acquired at the hospital (Central Venous Catheter-Related Bloodstream Infection Rate)
  • Hip fracture following surgery (Postoperative Hip Fracture Rate)
  • Excessive bruising or bleeding as a consequence of a procedure or surgery (Excessive bruising or bleeding as a consequence of a procedure or surgery)
  • Electrolyte and fluid imbalance following surgery (Postoperative Physiologic and Metabolic Derangement Rate)
  • Respiratory failure following surgery (Postoperative Respiratory Failure Rate)
  • Deep blood clots in the lungs or legs following surgery (Postoperative Pulmonary Embolism or Deep Vein Thrombosis Rate)
  • Bloodstream infection following surgery (Postoperative Sepsis Rate)
  • Breakdown of abdominal incision site (Postoperative Wound Dehiscence Rate)
  • Accidental cut, puncture, perforation or hemorrhage during medical care (Accidental Puncture or Laceration Rate)
  • Foreign objects left in body during a surgery or procedure (Foreign Object Left During Surgery or Procedure)

Date Last Updated: April 7, 2015 

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