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Hospital Standardized Mortality Ratio (HSMR)

The hospital standard mortality ratio (HSMR) is an important measurement that provides hospitals information that helps to identify areas for improvement. The HSMR is not designed for comparisons between hospitals. When tracked over time, the HSMR tells how successful the hospital is improving quality and patient safety and reducing deaths.

How the HSMR is calculated

The HSMR is calculated as a ratio of the actual number of deaths to the expected number of deaths among patients in the hospital. The HSMR is adjusted for factors affecting mortality such as age, sex and length of stay in the hospital.

How to interpret the HSMR
  • An HSMR equal to 100 suggests that there is no difference between the hospital's mortality rate and the overall average rate.
  • An HSMR greater than 100 suggests that the local mortality rate is higher than the overall average.
  • An HSMR less than 100 suggests that the local mortality rate is lower than the overall average.

The following outlines the Huron Perth Healthcare Alliance's performance in recent years:

  Fiscal Year   HSMR  
 2017/2018   81
  2016/2017           75
  2015/2016   78
  2015/2014   82
  2013/2014   93