Key concepts

Same day admitted mental health care
Key concept Description
Diagnostic group The classification of diagnostic groups is based on the ICD-10 principal diagnosis assigned to the episode of care at discharge. There are 8 clinical groupings of the ICD-10 diagnoses relating to mental and behavioural disorders. For further details of these diagnostic groups, see the data source section.
Episode An episode of care in Private hospitals involves a period of care from admission to separation. Counts of episodes include only clinically substantive episodes of care. Episodes that are of brief duration (1 or 2 contacts only) and episodes during which contacts were sparse (average interval between contacts 6 weeks or greater) are excluded from the count. Consequently, the count of episodes can in some cases be less than the count of unique patients. 
Mental health-related

A separation is classified as mental health-related if: 

  • it had a mental health-related principal diagnosis which, for admitted patient care, is defined as a principal diagnosis that is either a diagnosis that falls within the section on Mental and behavioural disorders (Chapter 5) in the International Statistical Classification of Diseases and Related Health Problems, 10th revision, Australian Modification (ICD-10-AM) classification (codes F00–F99) or a number of other selected diagnoses (see the Classification Codes section for the full list of applicable diagnoses), or
  • it included any specialised psychiatric care.
Principal diagnosis The principal diagnosis is the diagnosis established after study to be chiefly responsible for occasioning the patient’s episode of admitted patient care.
Procedure Procedure refers to a clinical intervention that is surgical in nature, carries an anesthetic risk, requires specialised training and/or requires special facilities or services available only in an acute care setting. Procedures therefore encompass surgical procedures and non-surgical investigative and therapeutic procedures, such as X-rays. Patient support interventions that are neither investigative nor therapeutic (such as anesthesia) are also included.
Same day admitted mental health care

The definition of same day admitted mental health care is slightly different between the two data sources.

A separation for Public hospitals is classified as same day admitted mental health care if the following apply:

  • the separation was a same day separation (that is, admission and separation occurred on the same day),

An admission for Private hospitals is classified as same day admitted mental health care based on data reported as ‘Same day episode’ including:

  • Hospital-based same day admissions, 
  • Single overnight for same day admissions for ECT,
  • Hospital-in-the-home or outreach care visits to patient’s homes recorded as same day admissions.
Separation Separation is the term used to refer to the episode of admitted patient care, which can be a total hospital stay (from admission to discharge, transfer or death) or a portion of a hospital stay beginning or ending in a change of type of care (for example, from acute care to rehabilitation). 'Separation' also means the process by which an admitted patient completes an episode of care by being discharged, dying, transferring to another hospital or changing type of care. Each record includes information on patient length of stay. A same-day separation occurs when a patient is admitted and separated from the hospital on the same date. An overnight separation occurs when a patient is admitted to and separated from the hospital on different dates.
Specialised psychiatric care A separation is classified as having specialised psychiatric care if the patient was reported as having spent 1 or more days in a specialised psychiatric unit or ward.
Without specialised psychiatric care A separation is classified as without specialised psychiatric care if the patient did not receive any days of care in a specialised psychiatric unit or ward. Despite this, these separations are classified as mental health related because the reported principal diagnosis for the separation is either one that falls within the Mental and behavioural disorders chapter (Chapter 5) in the ICD-10-AM classification (codes F00–F99) or is one of a number of other selected diagnoses (see the technical information).

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