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Study and Data Highlight ADHD Diagnostic Practices and Medication Trends in Australia

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Evolving Trends in ADHD Diagnosis and Treatment in Australia

A recent study of Australian psychologists and an analysis of prescription data highlight evolving trends and practices in the diagnosis and treatment of Attention-Deficit Hyperactivity Disorder (ADHD) in Australia. The study points to inconsistencies in diagnostic assessments, while prescription data shows a significant increase in adults receiving medication, with notable geographic variation.

Study on Diagnostic Practices Among Psychologists

A study involving an online questionnaire completed by 322 Australian psychologists involved in ADHD diagnosis and treatment has been published.

Key Findings on Assessment Consistency

While three in four psychologists reported always following established guidelines, fewer than half demonstrated assessment practices fully consistent with those guidelines.

  • Most psychologists utilized client interviews and gathered developmental history, but only three in four conducted mental health assessments.
  • Less than one in three assessed for other medical conditions that can mimic ADHD symptoms.
  • Fewer than one in three psychologists surveyed correctly identified all ADHD diagnostic criteria while also rejecting a non-ADHD item.
  • Four in ten clinicians did not recognize that symptoms must be inconsistent with a person's age and developmental stage for a diagnosis.

Established Diagnostic Guidelines

In Australia, the 2022 evidence-based practice guideline for ADHD outlines standards for assessment. Diagnosis must align with criteria from the Diagnostic and Statistical Manual of Mental Disorders (DSM-5) or the International Classification of Disease (ICD).

These criteria require that:

  • Impairments began before age 12.
  • Symptoms are present in multiple settings (e.g., home, school, or work).
  • Symptoms cause functional impairment.

The guidelines recommend a comprehensive assessment that includes:

  • A developmental, mental health, and medical history.
  • Input from more than one setting and individual (e.g., teachers or family members).
  • Investigation to rule out other conditions with similar symptoms, such as anxiety, thyroid issues, or sensory impairments.

The guidelines advise that diagnosis should not rely solely on questionnaires or direct observation.

Trends in ADHD Medication Prescriptions

Separate research commissioned by Four Corners and conducted by the Medicines Intelligence Research Program at UNSW shows changing patterns in ADHD treatment.

Prescription Data Findings

  • The rate of adults receiving ADHD medication has risen significantly since 2018, with a notable increase among women.
  • Data is based on adult Australians who filled at least one prescription for ADHD medication during the financial years 2020-2024.
  • Geographic analysis shows variation, with Western Australia containing 13 of the top 20 areas with the highest rates of ADHD prescriptions. Fremantle had the highest number.
  • Some suburbs and regional areas show very low prescription rates. Data analysis suggests that in areas like Fairfield, Sydney, up to 90% of adults with ADHD might be undiagnosed and untreated.
  • In some areas, ADHD medicine use exceeds what experts believe is the true prevalence of the condition.

Diagnosis and Treatment Context

Diagnostic Process and Providers

ADHD is diagnosed by psychologists, psychiatrists, or pediatricians. In Queensland, and with recent rule changes in most other states and territories, General Practitioners can also be trained to diagnose the condition and prescribe medications. Psychologists cannot prescribe medications.

Cost and Accessibility Considerations

  • Public psychiatric services are generally not funded to diagnose and treat ADHD, so diagnosis occurs primarily in the private sector.
  • Initial consultations can cost approximately $1,000, with follow-up appointments adding further costs.
  • Medicare rebates are available for some costs, though some providers do not allow rebates.

Expert Recommendations on Assessments

Professor Mark Bellgrove, who chaired the group that developed the Australian clinical guidelines, stated there is no single specific ADHD assessment.

The guidelines recommend avoiding services that:

  • Base conclusions primarily on questionnaires.
  • Provide short consultations ending only with a prescription for psychostimulant medication.
  • Lack follow-up or escalate doses beyond recommended guidelines.
  • Provide psychiatric reports containing inaccuracies.

Individuals concerned about ADHD symptoms are advised to consult a General Practitioner to discuss assessment options and compare procedures against established guidelines.