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Summary Hospital-level Mortality Indicator (SHMI) - Deaths associated with hospitalisation, England, July 2015 - June 2016

Publication date: 09:30 December 15, 2016


The Summary Hospital-level Mortality Indicator (SHMI) is the ratio between the actual number of patients who die following hospitalisation at the trust and the number that would be expected to die on the basis of average England figures, given the characteristics of the patients treated there. 

It covers all deaths reported of patients who were admitted to non-specialist acute trusts in England and either die while in hospital or within 30 days of discharge.  This publication of the SHMI relates to discharges in the reporting period July 2015 to June 2016.

To help users of the data understand the SHMI, trusts have been categorised into bandings indicating whether a trust's SHMI is 'higher than expected', 'as expected' or 'lower than expected'.

Further background information and supporting documents, including information on how to interpret the SHMI, are available on the SHMI support and guidance page (link below).

Please note that, following consultation with users, the detailed SHMI report will no longer be produced quarterly but will instead be published annually as part of our September release.  Further details of the consultation are available below. 

Key Facts

For the 136 trusts included in the SHMI from 1 July 2015 to 30 June 2016:

  • There were approximately 8.9 million finished provider spells, from which 284,000 deaths were recorded either while in hospital or within 30 days of discharge.  This includes deaths from other causes as well as deaths related to the reason for the hospital admission.
  • 11 trusts had a 'higher than expected' SHMI.  Of these 11 trusts, 5 also had a 'higher than expected' SHMI for the same period in the previous year.
  • 110 trusts had an 'as expected' SHMI.
  • 15 trusts had a 'lower than expected' SHMI.  Of these 15 trusts, 8 also had a 'lower than expected' SHMI for the same period in the previous year.


  1. There is a shortfall in the number of records in the Hospital Episode Statistics (HES) data for discharges in the reporting period July 2015 - June 2016 for Royal Berkshire NHS Foundation Trust (provider code RHW).  There are duplicate records in the HES data for Chelsea and Westminster Hospital NHS Foundation Trust (provider code RQM) for the same reporting period.  Further details are provided in the HES data quality notes (link below). This has a negligible impact on the SHMI at national level. However, the SHMI values for these trusts should be interpreted with caution.  

  2. Further information on data quality can be found in the SHMI Background Quality Report, which can be downloaded from the 'Resources' section of this page.


Date Range: 01 July 2015 to 30 June 2016
Geographical coverage: England
Geographical granularity: NHS Trusts

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