Skip to main content

Publication, Part of

Learning Disability Services Monthly Statistics, AT: November 2021, MHSDS: September 2021 Final

Official statistics, Experimental statistics

AT data tables - total length of stay

The Assuring Transformation (AT) data tables were updated due to an issue with historic length of stay data being incorrectly calculated in table 2.7 (now removed). This has been replaced with table 3.4 which contains the correct data. Figures for November 2021 were unaffected.

20 December 2021 10:30 AM

About the Mental Health Services Dataset


These statistics are derived from submissions made using version 4.1 of the Mental Health Services Dataset (MHSDS) for April 2020 data onwards.

This is the final monthly report to be published using data collected under MHSDS version 4.1.  The move to MHSDS version 5 from the MHSDS October 2021/AT December 2021 reporting period onwards brings with it changes to the dataset, and the construction of a number of measures will change as a result.  

This release comprises: 

  • A summary of findings which presents England level analysis of key measures based on data submitted.
  • Excel data tables covering a wide range of data covered by the collection. 
  • A monthly CSV file which presents key measures at England level based on data submitted.
  • An easy read version of the summary report.

The MHSDS was introduced on the 1 January 2016 and superseded the following standards:  

  • ISB 0011 Mental Health and Learning Disabilities Dataset (MHLDDS)
  • ISB 1072 Child and Adolescent Mental Health Services (CAMHS) Dataset
  • ISB 1509 Mental Health Care Cluster
  • ISB 1078 Mental Health Clustering Tool

The changes incorporate requirements in support of Children and Young People's Improving Access to Psychological Therapies (CYP IAPT), elements of the Learning Disabilities Census (LDC) and elements of the Assuring Transformation (AT) Information Standard.  Information provided in this release therefore covers, learning disabilities and autism services for all ages. Learning disabilities and autism services have been included in MHSDS (and its previous guises) since September 2014.

The measures reported here are currently experimental statistics and will be released as such, until the characteristics of data flowed using the current data standard are fully understood. Experimental statistics are official statistics which are published in order to involve users and stakeholders in their development and as a means to build in quality at an early stage. It is important that users understand that limitations may apply to the interpretation of this data. 

Further information on people using NHS funded secondary mental health services can  be found within the main MHSDS monthly publication which is available here.

Scope of collection

Information is presented by hospital spells and ward stays in this report. A hospital spell is a continuous period of inpatient care under a single Hospital Provider starting with a hospital admission and ending with a discharge from hospital. A ward stay is within a hospital spell so one hospital spell could include more than one ward stay for a patient if they have moved wards. The counts of hospital spells are therefore different to the count of ward stays and would expect the count of ward stays to be greater. However, submissions have to include hospital spell information but not necessarily ward stay information. Where the number of ward stays are less than hospital spells, this indicates that information about the ward where patients were receiving care was not provided for everyone in hospital. Despite the limitations of the ward stay information, it is still used in the report as it provides more detailed information than hospital spells about the episode of care.

Figures on the use of restrictive interventions in inpatient LDA services from MHSDS are subject to a number of data quality issues (see Data Quality Section for further information). Therefore, these figures should be interpreted with caution.

Last edited: 20 December 2021 9:33 am