Consumer outcomes in mental health care

Specialised mental health treatment and support services have an important role in the treatment and recovery of people with mental illness. The National Outcomes and Casemix Collection (NOCC) collects information using measures completed by clinicians and consumers about a person’s clinical status during their mental health care. In one year, information is collected from around 211,100 people across Australia, which is about 44% of people who received care from public sector specialised mental health services.

Since 2014–15 and 2023–24, the most frequent mental health-related problems affecting consumers are Emotional problems for adolescents, and Depressed mood and Other mental and behavioural problems for adults. Depressive episode remains among the five most common principal diagnoses but its frequency has decreased over the same period of time.

Changes in clinical outcomes can be calculated for episodes of care where clinical measures have been completed twice (by consumers or clinicians), to show whether consumers show improvement, no change or deterioration while using specialised mental health care. 

Since data was first reported, each year a higher proportion of consumer episodes show:

• Improvement compared to other outcomes if the consumer had completed acute inpatient care.
• Improvement compared to other outcomes if the consumer was aged 18–64 years and had completed ambulatory care.
• No change compared to other outcomes if the consumer was still receiving ongoing ambulatory care.

Episodes showing Deterioration are the least common outcome across all consumer groups. This outcome is more frequent in ongoing ambulatory care compared to other consumer groups. In the latest year of data, there was Deterioration in up to 20% of episodes (for consumers aged 18–64 years in ongoing ambulatory care).

Measures can be completed by clinicians and/or by consumers and clinical outcomes can be calculated where the same measure has been completed twice for a consumer during an episode of care – once during admission and then during a follow-up. This ‘before and after’ or ‘matched pair’ of measures allows episodes of care to be classified into the outcomes of Improvement, No change, or Deterioration. These classifications rely on significance testing to identify change.

Clinical outcomes vary depending on consumer group and age group. There are some overall patterns in the data that apply across all age groups (Figure NOCC.1). During 2023–24:

• The highest proportions of Improvement were for consumers who completed acute inpatient care. This held for both clinician- and consumer-rated measures. People in this consumer group showed improvement for between 42% and 75% of episodes.
• People were more likely to show No change if they were in ongoing ambulatory care, for both clinician- and consumer-rated measures. People in this consumer group showed no change for between 47% and 68% of episodes.
• Deterioration was the least common outcome across all consumer groups. Consumers showed deterioration for between 4% and 20% of episodes.

Children and adolescents (11–17 years)

In 2023–24, clinician-rated measures for more than half of completed care episodes for this age group showed Improvement (61% of episodes in inpatient and 51% in ambulatory). 

For consumer-rated measures, No change was the most common outcome both after care and during ongoing ambulatory care (around 47% of episodes). These findings have been consistent since 2014–15 (Figure NOCC.1).

In 2023–24, clinician-rated measures showed Deterioration in 16% of ongoing ambulatory episodes, 8% of completed acute inpatient episodes and 8% of completed ambulatory episodes.

Adults (18–64 years)

During 2023–24, for both clinician-rated (56%) and consumer-rated (68%) measures, No change was the biggest single category for this age group in ongoing ambulatory care.

Clinician-rated measures showed Deterioration in 20% of ongoing ambulatory episodes, 7% of completed ambulatory episodes and 5% of completed acute inpatient episodes.

Consumer-rated measures showed Deterioration in 12% of ongoing ambulatory episodes, 4% of completed ambulatory episodes and 5% of completed acute inpatient episodes.

Since 2014–15, both clinician-rated and consumer-rated measures have shown Improvement in completed acute inpatient and completed ambulatory care (Figure NOCC.1).

Older persons (65 years and older)

During 2023–24, for clinician-rated measures Improvement showed, was the dominant outcomes for this age group in completed acute inpatient care (74% of episodes). Since 2019–20, No change has been the biggest category in ambulatory care (Figure NOCC.1).

Clinician-rated measures showed Deterioration in 17% of ongoing ambulatory episodes, 6% of completed ambulatory episodes and 5% of completed acute inpatient episodes.

Consumer-rated measures for completed acute inpatient care showed Improvement (62% of episodes). For ongoing ambulatory care most episodes (68%) showed No change.

Consumer-rated measures showed Deterioration in 8% of ongoing ambulatory episodes, 4% completed ambulatory episodes and 4% completed acute inpatient episodes.

Clinical outcomes can only be calculated on matched pairs of collection occasions where the same clinical measure has been completed twice for a particular consumer during an episode of care.

The number of episodes with matched pairs are lower for consumer-rated measures and higher for clinician-rated measures. 

During 2023–24, consumer-rated clinical outcomes could be calculated for 10 to 40% of episodes, depending on consumer group and age band. Clinician-rated clinical outcomes could be calculated for 81% to 95% of episodes (Figure NOCC.2). 

In inpatient settings, the proportion of episodes with matched pairs for consumer-rated measures has increased between 2014–15 and 2023–24:

• from 26% to 40% for consumers aged 11–17 years,
• from 6% to 29% for consumers aged 18–64 years, and 
• from 4% to 24% for consumers aged 65 years and over.

Caution should be applied in comparing outcomes using clinician-rated with consumer-rated measures because it cannot be assumed they are the same consumers.

All people who receive clinical care in public sector specialised mental health services are in-scope to be included in the NOCC. Since 2014–15, NOCC measures are collected for more than 41% of people who receive care from these services. The proportion of people receiving care whose measures are collected (coverage) varies by age group. For example, the coverage proportion for people aged less than 18 and over 75 years has decreased over the past 10 years, while for other groups it has increased (Table NOCC.1).

Demographic characteristics of consumers

Figure 3 shows the demographic characteristics of consumers receiving clinical care and of consumers in the NOCC. The term ‘First Nations people’ is used in this report to refer to people identified as being of Aboriginal and/or Torres Strait Islander origin.

In 2022–23, around 80% of consumers receiving clinical care were aged 0 to 54, compared with 81% of consumers in the NOCC. Only 12% of consumers receiving clinical care and 10% of consumers in the NOCC were aged 65 years or older.

Mental health legal status indicates whether a person is treated on an involuntary basis under the relevant state or territory mental health legislation during an episode of care.

During 2023–24, Involuntary status was recorded for 39% of discharge collection occasions in acute inpatient care and 11% of collection occasions in ambulatory care. For more information about involuntary treatment in mental health visit the involuntary care section.

Across all age groups, many consumers face more than one clinically significant problem. Overall, Emotional problems (adolescents) and Depressed mood (adults) are common along with Other mental health and behavioural problems for adults, indicating the presence of comorbid problems (Figure NOCC.4).

Clinically significant problems vary across settings and age. Across all age groups, mental health-related problems of Self-injury, Hallucinations and Substance misuse are more frequently reported in acute inpatient settings than ambulatory settings.

Children and adolescents (11–17 years)

Emotional problems were the most common clinically significant problems affecting consumers in this age group during 2023–24 for inpatient and ambulatory settings (88% and 86% of collection occasions respectively).

Self-injury has been among the most common mental health-related problems since 2014–15. Between 2020–21 and 2021–22, Self-injury surpassed Family problems and became the second most common problem in admitted settings (70% of collection occasions in 2023–24). Similarly, in ambulatory care, Self-injury increased from 39% of collection occasions in 2014–15 to 49% in 2021–22 and 45.5% in 2023–24.

Overactivity showed a large increase in admitted settings from 46% of collection occasions in 2022–23 to 55% in 2023–24. Other mental health-related problems in this age group are Family and Peers problems, which have been decreasing over the past 10 years in ambulatory settings.

Adults (18–64 years)

In 2023–24, the mental health-related problems most commonly affecting this age group were Depressed mood (around 62% of collection occasions in acute inpatient care), and Other mental and behavioural problems (around 64% of collection occasions in acute inpatient care and 58% in ambulatory care). While, these proportions have been steadily increasing over the past 10 years in admitted settings, they have been decreasing in ambulatory settings. The presence of clinically significant problems in Other mental and behavioural problems indicate comorbid problems for the consumer. Relationships and Substance misuse are also rated as clinically significant problems in both settings.

Older persons (65 years and older)

In 2023–24, mental health-related problems most commonly affecting this age group were Other mental and behavioural problems indicating comorbid problems (70% of collection occasions in acute inpatient, 55% ambulatory), Physical illness or disability problems (52% acute inpatient, 59% ambulatory) and Depressed mood (68% acute inpatient care, 49% in ambulatory care). These have been similar since 2014–15. 

The principal diagnosis recorded at discharge provides information on the treated prevalence of specific mental illnesses in specialised mental health care services. Principal diagnosis is recorded as a code from the International Classification of Diseases and Related Health Problems (ICD-10-AM, 12^th Edition).

Of specified mental health-related diagnoses, Depressive episode was among the five most frequent principal diagnoses for all age groups and settings. However, the proportions of discharge collection occasions with a principal diagnosis of Depressive episode have decreased over the past 10 years across all ages and settings. In acute settings it has decreased from 23% to 9% for consumers aged 11–17, from 12% to 8% for consumers aged 18–64 and from 27% to 20% for consumers aged 65 and over. In ambulatory settings it has almost halved for consumers aged 18 to 64 and decreased from 23% to 15% for consumers aged 65 and over.

Mental disorder not otherwise specified was among the most frequent principal diagnoses recorded at discharge during 2023–24 for all age groups and settings, and its frequency has been increasing since 2014–15 (Figure NOCC.5). This suggests heterogeneity in the presentation of mental health diagnoses for consumers. It should be noted that this diagnosis may be used when a person presents to a service for care but further investigation is required by clinical staff to make a more specific diagnosis. 

Children and adolescents (11–17 years)

During 2023–24, for this age group Reaction to severe stress and adjustment disorders was among the most frequently specified mental health-related principal diagnoses at discharge in admitted inpatient care, increasing from 14% in 2020–21 to 20% in 2023–24. Similarly, 14% of collection occasions in ambulatory care recorded that diagnosis. Other commonly reported diagnoses were Other anxiety disorders in ambulatory care (13%), and Depressive episode in acute inpatient (9%) (Figure NOCC.5).

Adults (18–64 years)

During 2023–24, for this age group Schizophrenia was the most frequently specified diagnosis at discharge across both settings (15% acute inpatient, 12% ambulatory). Depressive episode was also among the most frequently recorded principal diagnoses (8% acute inpatient, 7% ambulatory) (Figure NOCC.5). 

Other frequently recorded diagnoses were Reaction to severe stress and adjustment disorders (12% in ambulatory) and Mental and behavioural disorders due to other psychoactive substance use (8% in inpatient). 

Older persons (65 years and older)

In 2023–24, for this age group the most frequently specified mental health-related principal diagnoses at discharge were Depressive episode (20% acute inpatient, 15% ambulatory), Dementia (9% in ambulatory) and Bipolar affective disorders (11% in acute inpatient). The proportion of collection occasions recording Dementia as principal diagnosis has decreased over the past 10 years across both settings.

A range of other mental health services are not included in the NOCC – for example, clinical measures may be collected to aid understanding of consumers’ recovery in private hospitals, private clinicians’ practices, non-government organisations, primary health care networks, and other services. For more information on outcomes of mental health care in private hospitals see the Australian Private Hospital Association Private Psychiatric Hospitals Data Reporting and Analysis Service (PPHDRAS). 

In this section, measures of statistical uncertainty pertaining to estimates (95% confidence intervals) are shown in all data tables and represented in data visualisations by black bars. If the intervals for comparison groups do not overlap – that is, they do not include the same values in the range – the difference between groups can be generally inferred to be statistically significant.

More about confidence intervals

A confidence interval is a range of values that quantifies the statistical uncertainty in estimates that result from natural or random variation. For example, in the number of services provided and the number of persons using services over time. There are also non-random sources of uncertainty, such as incomplete reporting, that are not captured by confidence intervals.

Generally, confidence intervals describe how different an estimate could have been if the underlying conditions stayed the same but random fluctuations had led to a different set of data. Accordingly, it is recommended that confidence intervals are reported alongside a number estimate.

Confidence intervals are calculated with a stated probability (commonly 95%); this means we can be 95% confident that the confidence interval includes the true value if the assumptions made in the construction of the confidence interval hold. Larger numbers of observations yield more precise estimates with narrower confidence intervals. Confidence intervals can be used to perform tests of statistical significance. If the 95% confidence intervals do not overlap – that is, they do not include the same values in the range – the difference can be said to be statistically significant (note that differences can be significant in a subset of cases where the ranges do overlap). 

In this section, 95% confidence intervals are shown in most figures and all tables.

Further information about confidence intervals, including calculation methods, statistical assumptions behind the calculation and sources of variability can be found in the Data and analysis methods [DOCX 95kB] resource.

Clinical measures are surveys or forms that are used to gather information about a person's clinical mental health status and functioning. These measures can be completed by clinicians about the consumer (known as clinician-rated), completed by the consumer (consumer-rated), and completed by families and carers about the consumer (carer-rated).

Continuous collection of information about consumers’ mental health can be used to report on outcomes of care, that is, whether consumers of mental health services show improvement, no change, or deterioration from receiving mental health care.

Under the NOCC specifications, clinical and casemix measures may be completed at collection occasions in public specialised mental health services, including psychiatric inpatient (admitted), residential and ambulatory (non-admitted) settings. The three collection occasion types are Admission, Review, and Discharge. A person may have multiple collection occasions.

During 2023–24 there were around 528,000 collection occasions across all age groups and settings. Since 2014–15, around 3 in 4 collection occasions are set in ambulatory service settings – accounting for 90% of collection occasions for people aged 11–17 years, 75% for people aged 18–64, and 82% for people aged 65 years and older in 2023–24.

Collection occasions in inpatient settings represent more than 1 in 5 collection occasions in total – this varies by age group. For people aged 11–17 years, 10% of collection occasions were set in an inpatient setting in 2023–24, compared to 23% for people aged 18–64, and 18% for people aged 65 years and older. Within inpatient settings, the majority of service programs (95%) provide acute care across all ages (Tables NOCC.3 and NOCC.4).

Since 2014–15, collection occasions in residential services account for no more than 2% in any age group (Table NOCC.3). This section reports data for ambulatory and acute inpatient service settings.

Clinician-rated measures are completed at much higher rates than consumer-rated measures. This is the case for each type of collection occasion (admission, discharge and review) and across all age groups for both acute inpatient and ambulatory settings.

For example, in 2023–24, clinician-rated measures were collected at admission for between 90% and 97% of expected collection occasions while consumer-rated measures were collected between 25% and 55% of the time (numbers depend on age group and service setting). While consumer-rated measures are offered to all consumers, these measures are voluntary. Data are available in Tables NOCC.5, NOCC.6, and NOCC.7.

There are several factors which impact the completion of consumer-rated measures. The NOCC protocol requirements vary across settings and lengths of care. In addition, current NOCC data shows that consumer rated measures are seldom used in services for older persons. Collection of SDQ measures is much higher in children and adolescent than that in adult and older persons services (NMHIDEAP 2013).

Mental health legal status is a major factor influencing consumer-rated completion rates. Consumer engagement may be difficult for consumers under involuntary orders (NMHIDEAP 2013).

The same clinician-rated measures have been adopted by all states and territories implementing the NOCC. There is more variability for the consumer-rated measures, with states and territories adopting different measures.

Due to lower completion rates of consumer-rated measures, the clinician-rated suite of Health of the Nation Outcome Scales (HoNOS) is used in this report to provide a national picture of the mental health related problems faced by consumers at admission to a mental health service. This makes use of the most consistent and comparable data across states and territories.

More information can be found in the Data and analysis methods [DOCX 95kB] resource.

Information gathered at collection occasions can be organised into consumer groups, which pairs the episode type (completed, ongoing, closed) with the setting in which treatment is provided (acute inpatient, ambulatory). Clinical outcomes are calculated by consumer group and episode type.

More about consumer groups

The most frequent consumer groups are:

• Completed acute inpatient (95% of acute inpatient episodes) – episodes that started and finished within the reporting year with a duration longer than 3 days. Consumers are often very unwell at admission, but their symptoms can often be treated quite effectively and reasonably quickly. Many of the consumers in this group will be discharged to ambulatory services once their symptoms have begun to improve (Table NOCC.13).
• Completed ambulatory (48% of ambulatory episodes) – episodes that started and finished within the reporting year with a duration longer than 14 days. Consumers may be seen in ambulatory services only or in ambulatory services following an episode of acute inpatient care. The severity of symptoms at the beginning of an episode is generally better than for consumers in acute inpatient care.
• Ongoing ambulatory (37% of ambulatory episodes) – episodes of care that were still open at the end of the reporting year. Consumers may be affected by illnesses that are persistent or episodic in nature. Goals of care for these consumers may be to reduce symptoms, improve functioning or maintain their current state of wellness and prevent deterioration. Thus, for some consumers, no significant change may be a positive result that provides a basis for longer-term treatment.

Clinical outcomes is a Key Performance Indicator for Australian mental health services

Change in mental health consumers’ clinical outcomes is included in the Key Performance Indicators for Australian Public Mental Health Services. These indicators contribute to measuring the performance and progress of mental health services in Australia. The indicators are also reported on the Mental Health Online Report. Refer to the data source section for more information.

Patient-reported measures in Australia

This report draws on data from the National Outcomes and Casemix Collection. The NOCC collects patient-reported perspectives of their mental health status during mental health care to report clinical outcomes as rated by consumers in all Australian states and territories. 

The Your Experience of Service survey has been implemented in three Australian states to gather patient-reported experience of care from mental health service consumers. For more information visit Consumer experience in public mental health services. 

Australia is one of the countries reported by the international Organisation for Economic Cooperation and Development (OECD) to regularly collect and report patient-reported outcome measures (PROMs) and patient-reported experience measures (PREMs) in mental health settings (Bienassis et al. 2021).

International outcomes of mental health care

The OECD’s Healthcare Quality and Outcomes Indicators (HCQO) include indicators of mental health care, such as patient perspectives and outcomes of that care. This includes data from 40 countries, including Australia. Measures used as indicators include excess mortality of people with mental disorders and patient-reported measures of mental health care outcomes. To date, the use of mental health care PROMs is limited to a small number of countries and settings – and “there is a pressing need, both within and across countries, to consistently and effectively measure the effects and impact of care for patients who use mental health care services” (OECD 2022).

Patient-Reported Indicator Surveys (PaRIS)

PaRIS is the OECD’s Patient-Reported Indicator Survey which aims to provide insights in consumer-rated outcomes and consumer-reported experiences across provider types and regions. Initial findings of the 2021 PaRIS mental health pilot data indicated improvement following treatment on patient-reported outcomes for those receiving mental health care services (OECD 2022).

Data reported in this section are sourced from the National Outcomes and Casemix Collection (NOCC) Database.

The NOCC is a nationally agreed data collection for the routine collection and reporting of consumer outcomes using clinical measures. Under the original National Mental Health Policy 1992, Australian governments committed to national monitoring of the effectiveness of public mental health services. The primary objective of the NOCC was to establish the routine use of outcome measures in all publicly funded or managed mental health services, where such measures contribute both to improved practice and service management (Burgess et al. 2015). The NOCC has been progressively implemented in state and territory public sector specialised mental health services from 2001 with all jurisdictions reporting by June 2005. 

The NOCC collects information about a person's clinical mental health status and functioning during their episode of mental health care. Measures completed by clinicians about the consumer (known as clinician-rated) and measures completed by the consumer (consumer-rated) are used. These measures are completed at multiple collection occasions during an episode of care to monitor changes in consumers' clinical status and functioning. Ratings information is used to report on consumers’ outcomes of care.

The NOCC also gathers ‘casemix’ information, which is information about the mix of people who are receiving mental health services according to their clinical status and the nature of the care they are receiving. The casemix information collected in the NOCC supports the introduction of the first version of the Australian Mental Health Care Classification (AMHCC) (Independent Hospital Pricing Authority 2018). In this report, the reported casemix items are the consumer’s mental health legal status and diagnosis.

The collection of measures for the NOCC is guided by a set of rules on what measures to collect and when to collect them. More information is in the Data and analysis methods resource and more detailed information is in the technical specifications.

Data Quality Statements are published annually on METEOR. Statements provide information on the institutional environment, timeliness, accessibility, interpretability, relevance, accuracy and coherence. Refer to the National Outcomes and Casemix Collection 2023–2024; National Outcomes and Casemix Database, 2025; Quality Statement.

National indicator set: Change in consumers’ clinical outcomes

The Key Performance Indicators for Australian Public Mental Health Services (KPIs) were developed for the purpose of improving public mental health services. KPI 01 Change in mental health consumers’ clinical outcomes draws on data from the NOCC for reporting. These indicators contribute to measuring the performance and progress of mental health services in Australia. 

Change in mental health consumers’ clinical outcomes was added to the national KPI set in 2011 (NMHPSC 2013).

The Key Performance Indicators are published on Mental health Online Report (MHOR). Due to differences in methodology there is variation in the NOCC data that are reported for the KPIs, this section, and other reporting tools.

Other reporting tools

Other NOCC public reporting products focus on the clinical utility of the collection, through the publication of ‘normative’ reference data for the clinical measures that assist clinicians and other users to better understand the outcomes and variability in the population under care. 

A Web Decision Support Tool allows users to compare an individual consumer’s scores at a single point in time, or change in scores over time, against normative data from ‘like’ consumers around Australia. 

A Reports Portal allows users to create tailored reports that provide different statistical summaries of the NOCC data, for example the change in scores on various measures across the course of given episodes. 

In the Web Decision Support Tool and the Reports Portal, NOCC data are reported at national and state/territory levels.

Bienassis K, Kristensen S, Hewlett E, Roe D, Mainz J and Klazinga N (2021) 'Patient-reported indicators in mental health care: towards international standards among members of the OECD', International Journal for Quality in Health Care, 34(S1): ii7-ii2, doi:10.1093/intqhc/mzab020.

Burgess P, Pirkis J and Coombs T (2015) 'Routine outcome measurement in Australia', International Review of Psychiatry, 27(4):264-75.

CIHI (Canadian Institute for Health Information) (2021) Outcomes, CIHI website, accessed 18 May 2021.

Independent Hospital Pricing Authority (2018) Australian Mental Health Care Classification v1.0 User Manual, Sydney: IHPA.

NMHIDEAP (National Mental Health Information Development Expert Advisory Panel) (2013) Mental Health National Outcomes and Casemix Collection: NOCC Strategic Directions 2014–2024, Commonwealth of Australia, Canberra, AMHOCN website, accessed 31 July 2025.

NMHPSC (National Mental Health Performance Subcommittee) (2013) Key Performance Indicators for Australian Public Mental Health Services, 3^rd edn, NMHPSC, Australian Health Ministers Advisory Council’s Mental Health Drug and Alcohol Principal Committee (MHDAPC).

OECD (Organization for Economic Co-operation and Development) (2022) Establishing standards for assessing patient reported outcomes and experiences of mental health care in OECD countries: Technical report of the PaRIS mental health working group pilot data collection, OECD website, accessed 10 July 2025.