Summary Hospital-level Mortality Indicator (SHMI) - Deaths associated with hospitalisation, England, January 2017 - December 2017National statistics, Official statistics, Open data
- Publication date:
- 19 Jul 2018
- Geographic coverage:
- Geographical granularity:
- NHS Trusts
- Date range:
- 01 Jan 2017 to 31 Dec 2017
This publication of the SHMI relates to discharges in the reporting period January 2017 to December 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 January 2017 to 31 December 2017:
• There were approximately 9.0 million discharges, from which 294,000 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.
• 13 trusts had a higher than expected number of deaths. Of these 13 trusts, 8 also had a higher than expected number of deaths for the same period in the previous year.
• 103 trusts had a number of deaths within the expected range.
• 18 trusts had a lower than expected number of deaths. Of these 18 trusts, 12 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. 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.
3. Heart of England NHS Foundation Trust (trust code RR1) became part of University Hospitals Birmingham NHS Foundation Trust (trust code RRK) on 1st April 2018. Burton Hospitals NHS Foundation Trust (trust code RJF) was acquired by Derby Teaching Hospitals NHS Foundation Trust (trust code RTG) on 1st July 2018. The new trust is called University Hospitals of Derby and Burton NHS Foundation Trust (trust code RTG). Ipswich Hospital NHS Trust (trust code RGQ) was acquired by Colchester Hospital University NHS Foundation Trust (trust code RDE) on 1st July 2018. The new trust is called East Suffolk and North Essex NHS Foundation Trust (trust code RDE). However, as we received notification of these changes after data processing for the July 2018 SHMI publication began, separate indicator values for these trusts have been produced for this publication.
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.