Australian community and inpatient general public sector mental health services between 2017-18 and 2021-22: Relative stasis in bed capacity, increasing outpatient demand, and stunted expenditure.

Objective: To descriptively analyse Australian public sector General Mental Health Services (GMHS) expenditure, ambulatory, and inpatient services, including key performance indicators (KPIs) in comparison with other subspeciality mental health services (MHS).

Method: We descriptively analysed data published by the Australian Institute of Health and Welfare (AIHW), including inpatient, ambulatory services, expenditure, and KPIs.

Results: From 2017-18 to 2021-22, per capita expenditure for Australian GMHS (18-64) rose by an average annual inflation-adjusted change of 2%. Overall bed numbers remained static, with non-acute beds declining, and commensurate expansion of acute beds. Community GMHS had high outpatient utilisation, with high rates of schizophrenia, schizoaffective disorder, and bipolar affective disorders as primary diagnoses in mid-life. From 2017-18 to 2021-22, GMHS inpatient and ambulatory episodes had decreasing rates of significant improvement and increasing rates of significant deterioration.

Conclusions: Although GMHS has the highest overall population and service utilisation, there has been static bed availability and relatively small increases in expenditure which are occurring concurrently with worsening clinical outcomes. Evidence-based modelling of GMHS and outcomes is required to inform future service improvement.