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Data set, Part of

SHMI data

Date Range:
01 Mar 2019 to 29 Feb 2020
Publication Date:
Next Publication Date:
13 Aug 2020
Geographic Coverage:
England
Geographical Granularity:
NHS Trusts, Hospital Sites

Summary

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 includes deaths which occurred in hospital and deaths which occurred outside of hospital within 30 days (inclusive) of discharge. Deaths related to COVID-19 are excluded from the SHMI.

The SHMI gives an indication for each non-specialist acute NHS trust in England whether the observed number of deaths within 30 days of discharge from hospital was 'higher than expected' (SHMI banding=1), 'as expected' (SHMI banding=2) or 'lower than expected' (SHMI banding=3) when compared to the national baseline.

Trusts may be located at multiple sites and may be responsible for one or more hospitals. A breakdown of the data by site of treatment is also provided.

The SHMI is composed of 142 different diagnosis groups and these are aggregated to calculate the overall SHMI value for each trust. The number of finished provider spells, observed deaths and expected deaths at diagnosis group level for each trust is available in the SHMI diagnosis group breakdown files. For a subset of diagnosis groups, an indication of whether the observed number of deaths within 30 days of discharge from hospital was 'higher than expected', 'as expected' or 'lower than expected' when compared to the national baseline is also provided.

Details of the 142 diagnosis groups can be found in Appendix A of the SHMI specification.

Notes:

1. As of the July 2020 publication, COVID-19 activity has been excluded from the SHMI. The SHMI is not designed for this type of pandemic activity and the statistical modelling used to calculate the SHMI may not be as robust if such activity were included. Activity that is being coded as COVID-19, and therefore excluded, is monitored in a new contextual indicator 'Percentage of provider spells with COVID-19 coding' which is part of this publication.

2. There is a shortfall in the number of records for Tameside and Glossop Integrated Care NHS Foundation Trust (trust code RMP) and University Hospital Southampton NHS Foundation Trust (trust code RHM). Values for these trusts are based on incomplete data and should therefore be interpreted with caution.

3. Day cases are excluded from the SHMI.  However, some day cases for University College London Hospitals NHS Foundation Trust (trust code RRV) have been incorrectly classified as ordinary admissions meaning that they have been included in the SHMI.  Values for this trust should therefore be interpreted with caution.

4. There is a shortfall in the number of birth records for Pennine Acute Hospitals NHS Trust (trust code RW6). This is likely to have a small impact on the trust level SHMI, but the impact on some diagnosis groups (groups 116 - Congenital anomalies, 117 - Short gestation and slow fetal growth, 118 - Birth related conditions, 119 - Other perinatal conditions and 141 - Livebirths) will be greater and so results for these diagnosis groups should be interpreted with caution.

5. The following mergers took place on 1st April 2020: Taunton and Somerset NHS Foundation Trust (trust code RBA) merged with Somerset Partnership NHS Foundation Trust (trust code RH5). The new trust is called Somerset NHS Foundation Trust (trust code RH5). Luton and Dunstable University Hospital NHS Foundation Trust (trust code RC9) merged with Bedford Hospital NHS Trust (trust code RC1). The new trust is called Bedfordshire Hospitals NHS Foundation Trust (trust code RC9). Weston Area Health NHS Trust (trust code RA3) merged with University Hospitals Bristol NHS Foundation Trust (trust code RA7). The new trust is called University Hospitals Bristol and Weston NHS Foundation Trust (trust code RA7). Mid Essex Hospital Services NHS Trust (trust code RQ8) merged with Southend University Hospital NHS Foundation Trust (trust code RAJ) and Basildon and Thurrock University Hospitals NHS Foundation Trust (trust code RDD). The new trust is called Mid and South Essex NHS Foundation Trust (trust code RAJ). Please note that separate indicator values have been produced for these organisations for this publication. From the August 2020 publication onwards, we will reflect these new organisation structures.

6. Further information on data quality can be found in the SHMI background quality report, which can be downloaded from the 'Resources' section of the publication page.

Resources