Summary Hospital-level Mortality Indicator (SHMI) - Deaths associated with hospitalisation, England, October 2017 - September 2018National statistics, Official statistics, Open data
- Publication date:
- 14 Feb 2019
- Geographic coverage:
- Geographical granularity:
- NHS Trusts
- Date range:
- 01 Oct 2017 to 30 Sep 2018
This publication of the SHMI relates to discharges in the reporting period October 2017 to September 2018.
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 131 trusts included in the SHMI from 1 October 2017 to 30 September 2018:
• There were approximately 9.1 million discharges, from which 299,000 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.
• 15 trusts had a higher than expected number of deaths. Of these 15 trusts, 7 also had a higher than expected number of deaths for the same period in the previous year.
• 101 trusts had a number of deaths within the expected range.
• 15 trusts had a lower than expected number of deaths. Of these 16 trusts, 13 also had a lower than expected number of deaths for the same period in the previous year.
1. There is a shortfall in the number of records for Brighton and Sussex University Hospitals NHS Trust (trust code RXH) meaning that values for this trust will be based on incomplete data and should therefore 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.
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