Inpatient census 2022: parts one and two

8. Methodology & further information

Time period and scope

The Inpatient Census was carried out by the Scottish Government and all NHS Boards, as at 23:59, 11th April 2022. This is the sixth time the Census has been undertaken.

The Census was conducted in 3 parts and covered:

• every patient occupying a psychiatric, addiction or learning disability inpatient bed in an NHS Scotland facility on the Census date (Part 1).
• every mental health, addiction or learning disability patient whose care is funded by NHS Scotland, but is being treated in a facility that is out with NHS Scotland (e.g. in a Local Authority care home, in a private hospital, in a NHS England facility), on the Census date (Part 2).
• every patient who was in receipt of Hospital Based Complex Clinical Care (HBCCC) in general acute inpatient beds on the Census date (Part 3).

The Census guidance notes are not available in an accessible form just now but we will publish them soon.

This report contains analysis from Parts 1 and 2 of the Census.

A separate report has also been published covering all Hospital Based Complex Clinical Care patients from Parts 1, 2 and 3.

Data completeness

NHS Scotland facilities (Part 1)

All 12 NHS Scotland territorial boards which have psychiatric, addiction or learning disability inpatient beds provided a return.

The State Hospital (Special NHS Board) provided a return.

Data completeness for individual Census questions varied. Where there was missing data, this has been footnoted against the corresponding table or displayed in the chart. Although most health boards had some missing data, for 143 of their patients (47%) NHS Tayside could only provide minimal data, including admission dates, age and diagnoses.

Patients treated outwith NHS Scotland (Part 2)

All NHS Scotland territorial boards which have mental health, addiction or learning disability patients whose care is funded by NHS Scotland, but are being treated in a facility that is outwith NHS Scotland provided a return.

Data completeness for individual Census questions varied.

Hospital Based Complex Clinical Care in general acute beds (Part 3)

Data completeness for the Hospital Based Complex Clinical Care Census is reported separately in the Hospital Based Complex Clinical Care Census.

Data collection

The Scottish Government’s EAS Unit provide data collection and validation support for a number of statistical returns across Education, Health, Social Care, Social Work, Transport, Housing, Communities, Finance, Justice, Environment and some 3^rd Sector. The EAS Unit provided secure data collection software (procxed.net) and first stage data validation checks. Further information about the data collection software can be found in the Data Privacy Impact Assessment which can be obtained on request from MHIC@gov.scot

Health & Social Care Analysis Division undertook 2^nd stage validation checks.

The data collection, analysis and report has been overseen and produced by statisticians. All statisticians in the Scottish Government are part of the Government Statistical Service (GSS) which comprises the statistics divisions of all major departments in the UK Government, and the devolved Governments of Scotland, Wales and Northern Ireland plus the Office for National Statistics, which has a coordinating role for the GSS.

Data confidentiality

A Data Protection Impact Assessment was undertaken prior to the Census which outlines how patient confidentiality is maintained. The Data Protection Impact Assessment can be obtained on request from MHIC@gov.scot

In addition, statistical disclosure control has been applied to the analysis. Statistical Disclosure Control (SDC) covers a range of ways of changing data which are used to control the risk of an intruder finding out confidential information about a person or unit (such as a household or business). This publication has used the following methods where there are under 5 patients in a particular category:

• Suppression of possibly disclosive cells (e.g. where the value is small) which means that the value for that cell in the table is not given and secondary suppression of cells which means at least one other value in the row or column is also not given to ensure that disclosive cells cannot be deduced through subtraction;
• Table redesign and recoding, where cells are grouped together to protect small value cells.

Further information about Statistical Disclosure Control is available here:

Statistical disclosure control - Office for National Statistics (ons.gov.uk)

Health Conditions

The International Classification of Diseases (10^th Revision) has been used in the analysis for specific health conditions. The health condition and relevant ICD-10 code can be found in the following table:

Selected health conditions	ICD-10 Codes
Dementia	F00 – F03
Alcohol misuse	F10
Drug misuse	F11 – F19
Schizophrenia	F20
Schizotypal and delusional disorders	F21 – F25, F28 – F29
Manic episode	F30
Bipolar affective disorder	F31
Depression	F32 – F33
Persistent mood (affective) disorders	F34
Other mood (affective) disorders	F38 – F39
Neurotic, stress-related and somatoform	F40 – F45, F48
Behavioural syndromes	F50 – F55, F59
Personality Disorders	F60 – F66 and F68 – F69
Learning Disabilities	F70 – F73 and F78 – F79
Behavioural and emotional disorders with onset usually occurring in childhood and adolescence	F90 – F95 and F98

Autism

For the purpose of this report, the autism cohort is defined by the patient meeting at least one of the following criteria:

Diagnosis of Autism

ICD-10 Code F84.0 or F84.1

NHS Boards answered Yes to the following health condition question:

Autistic Spectrum Disorder

1 - Yes

0 - No

Alcohol misuse cohort

For the purpose of this report, the alcohol misuse cohort is defined by the patient meeting at least one of the following criteria:

Diagnosis of Alcohol Misuse

ICD-10 Code F10

NHS Boards answered either 1 or 3 to the following question:

Was there a history of alcohol dependence or substance abuse in the four weeks prior to admission to hospital/care home?

1 - Yes – alcohol dependence or harmful use of alcohol only

2 - Yes – substance abuse (excluding alcohol)

3 - Yes – both alcohol dependence and other substance abuse

• The above definition is applicable for patients treated within NHS Scotland facilities only.

Drugs misuse cohort

For the purpose of this report, the drug misuse cohort is defined by the patient meeting at least one of the following criteria:

Diagnosis of Drug Misuse

ICD-10 Code F11 – F19

NHS Boards answered either ‘2’ or ‘3’ to the following question:

Was there a history of alcohol dependence or substance abuse in the four weeks prior to admission to hospital/care home?

1 - Yes – alcohol dependence or harmful use of alcohol only

2 - Yes – substance abuse (excluding alcohol)

3 - Yes – both alcohol dependence and other substance abuse

• The above definition is applicable for patients treated within NHS Scotland facilities only.

A question on non-prescribed drug use during hospital stay in the 2016 Census that contributed to the drug misuse count was not asked in 2017 so that questions on physical health checks to be included. However, only a small number of patients using non-prescribed drugs during hospital stay had no prior substance use in the 4 weeks before admission. Therefore, its exclusion had minimal impact on totals.

Forensic patients

Forensic patients were identified if NHS Boards indicated ‘yes’ to the following Census question: is the patient being managed primarily by forensic services?

Access to the data for further research

To enable further research and statistical analysis, extracts of the Inpatient Census data may be made available for approved researchers.

Academic researchers must initially apply to the ‘Statistics Public Benefit and Privacy Panel’ or the ‘Public Benefit and Privacy Panel for Health and Social Care^[1]’ to gain access to the Inpatient Census data. If the ‘Statistics Public Benefit and Privacy Panel’ or the ‘Public Benefit and Privacy Panel for Health and Social Care’ approve an application then a copy of the original application form and a copy of the approval letter should be emailed to the following address MHIC@gov.scot for approval by the Scottish Government (Health & Social Care Analysis Division and the Principal Medical Officer for Mental Health).

NHS Boards will have a version of the Inpatient Census dataset which contains information about patients for whom they are responsible for providing treatment for, or are responsible for funding. NHS boards will have their own arrangements in place for researchers to access health data. All Boards have a Caldicott Guardian who is responsible for assuring confidentiality and enabling appropriate data sharing, and a director responsible for research and development.