Summary Hospital-level Mortality Indicator (SHMI) - Deaths associated with hospitalisation, England, July 2016 - June 2017National statistics, Official statistics, Open data
- Publication Date:
- 14 Dec 2017
- Geographic Coverage:
- Geographical Granularity:
- NHS Trusts
- Date Range:
- 01 Jul 2016 to 30 Jun 2017
This publication of the SHMI relates to discharges in the reporting period July 2016 to June 2017.
The 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 patients admitted to hospitals in England who died either while in hospital or within 30 days of being discharged.
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'. For any given number of expected deaths, a range of observed deaths is considered to be 'as expected'. If the observed number of deaths falls outside of this range, the trust in question is considered to have a higher or lower SHMI than expected.
The SHMI is not a measure of quality of care. A higher than expected number of deaths should not immediately be interpreted as indicating poor performance and instead should be viewed as a 'smoke alarm' which requires further investigation. Similarly, an 'as expected' or 'lower than expected' SHMI should not immediately be interpreted as indicating satisfactory or good performance.
Further background information and supporting documents, including information on how to interpret the SHMI, are available on the SHMI homepage (see Related Links).
For the 134 trusts included in the SHMI from 1 July 2016 to 30 June 2017:
• There were approximately 8.9 million discharges, from which 292,000 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.
• 12 trusts had a higher than expected number of deaths. Of these 12 trusts, 7 also had a higher than expected number of deaths for the same period in the previous year.
• 106 trusts had a number of deaths within the expected range.
• 16 trusts had a lower than expected number of deaths. Of these 16 trusts, 11 also had a lower than expected number of deaths for the same period in the previous year.
1. For discharges in the reporting period April 2016 - March 2017, approximately one third of records for Nottingham University Hospitals NHS Trust (trust code RX1) have been submitted without patient identifiers (such as NHS number and date of birth). This will have affected the linkage of the HES data to the ONS death registrations data and may have resulted in a smaller number of deaths occurring outside hospital within 30 days of discharge being identified for this trust than would have been the case if the identifiers had been included. The results for this trust should therefore be interpreted with caution.
2. Central Manchester University Hospitals NHS Foundation Trust (trust code RW3) merged with University Hospital of South Manchester NHS Foundation Trust (trust code RM2) on 1st October 2017 to create a new organisation called Manchester University NHS Foundation Trust (trust code R0A). From this SHMI publication onwards, results will be presented to reflect the new organisational structure using combined data submitted by both trusts.
3. There is a shortfall in the number of records in the reporting period April 2016 - March 2017 for Guy's and St Thomas' NHS Foundation Trust (trust code RJ1) meaning that values for this trust will be based on incomplete data and should therefore be interpreted with caution. This data quality issue was identified by the HES data quality team after the release of this publication. This page and the accompanying resources have subsequently been updated to reflect this data quality issue.
4. 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.