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National Statistics
Publication

Summary Hospital-level Mortality Indicator (SHMI) - Deaths associated with hospitalisation, England, April 2016 - March 2017

This is part of

National statistics, Official statistics, Open data
Publication date:
Geographic coverage:
England
Geographical granularity:
NHS Trusts
Date range:
01 Apr 2016 to 31 Mar 2017

Summary

This publication of the SHMI relates to discharges in the reporting period April 2016 to March 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).

Key facts

For the 135 trusts included in the SHMI from 1 April 2016 to 31 March 2017:

• There were approximately 8.9 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.

• 10 trusts had a higher than expected number of deaths. Of these 10 trusts, 5 also had a higher than expected number of deaths for the same period in the previous year.

• 108 trusts had a number of deaths within the expected range.

• 17 trusts had a lower than expected number of deaths. Of these 17 trusts, 11 also had a lower than expected number of deaths for the same period in the previous year.

Notes:

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. 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.

Resources

Related links

Last edited: 17 September 2018 11:01 am