Technical notes

Introduction

The data presented in this report are sourced from a range of different data collections from several agencies and organisations, including the:

  • Australian Institute of Health and Welfare (AIHW)
  • Australian Bureau of Statistics (ABS)
  • Australian Criminal Intelligence Commission (ACIC) 
  • Australian Institute of Criminology (AIC) 
  • National Drug and Alcohol Research Centre (NDARC).

Each of the data sources provide part of the story of alcohol, tobacco and drug use. Data sources include a range of methodologies such as:

  • general population surveys (for example, the National Drug Strategy Household Survey)
  • surveys of sentinel populations (for example, the Illicit Drug Reporting System, the Drug Use Monitoring in Australia program and the National Needle Syringe Program)
  • population consumption data (for example, the National Wastewater Drug Monitoring Program and Alcohol available for consumption in Australia report)
  • administrative data (for example, Criminal Courts data).

Consolidating these data sources across multiple collections into one place provides a more complete story of current and emerging trends. However, it is also important to note methodological differences that can influence the comparability of results across data sources.

List of data sources and data quality

Australian Bureau of Statistics data sources

The ABS publishes a range of data examining different aspects of alcohol and other drugs, including:

  • surveys on alcohol and other drug use among the general population and among specific population groups (including First Nations people)
  • administrative and survey data on alcohol and other drug-related harms, including victimisation and mortality
  • administrative data on drug-related offences finalised in criminal courts across Australia.


Australian Criminal Intelligence Commission data sources

The ACIC publishes several reports examining alcohol and other drugs, including:

  • data on illicit drug markets, including arrests, seizures, and detections of illicit drugs at the Australian border
  • population consumption data for a range of drugs as measured via wastewater.


Australian Institute of Criminology data sources

The AIC produces several reports examining alcohol and other drugs and related harms in Australia, including:

  • ongoing monitoring of illicit drug use among people in police detention
  • reporting on the involvement of alcohol and other drugs in homicides.


Australian Institute of Health and Welfare data sources

The AIHW publishes a range of administrative and survey data examining different aspects of alcohol and other drugs, including:

  • availability of alcohol and prescription medicines
  • use of alcohol, tobacco, e-cigarettes and other drugs
  • treatment for alcohol and other drug use, including opioid pharmacotherapy
  • analysis of the burden of disease and injury related to alcohol and other drugs
  • alcohol and other drug-related harms, including hospitalisations and deaths.


Australian Research Centre in Sex, Health and Society data sources

The Australian Research Centre in Sex, Health and Society (ARCSHS) at La Trobe University manages several national surveys examining health and wellbeing of lesbian, gay, bisexual, transgender, intersex and queer people in Australia, including use of alcohol and other drugs among these cohorts.


Cancer Council Victoria data sources

Cancer Council Victoria produces several reports that include information about tobacco, alcohol and other drugs in Australia, including:

  • use of tobacco, e-cigarettes, alcohol and other substances among secondary school students
  • comprehensive information on tobacco in Australia.


Kirby Institute data sources

The Kirby Institute at the University of New South Wales releases several reports on Needle Syringe Programs (NSPs) across Australia, including information about services provided by NSPs and the people who access them.


National Drug and Alcohol Research Centre data sources

The National Drug and Alcohol Research Centre at the University of New South Wales manages the Drug Trends program of work, which releases reports related to the following research activities:

  • ongoing monitoring of illicit drug markets across Australia
  • surveys of alcohol and other drug use among people who regularly use stimulant drugs or regularly inject drugs
  • monitoring of epidemiological data on drug-related harms, including drug-related hospitalisations and drug-induced deaths.


Other data sources

Several other agencies release data that are included in this report, including:

  • Department of Infrastructure, Transport, Regional Development, Communications, Sport and the Arts
  • Organization for Economic Cooperation and Development (OECD)
  • United Nations Office on Drugs and Crime (UNODC).


Comparison of national data sources on alcohol and other drug use and harms

Surveys on alcohol and other drug use

Several nationally representative data sources are available to analyse recent trends in alcohol and other drug consumption. This includes the National Drug Strategy Household Survey (NDSHS) and the National Health Survey (NHS), which examine a range of factors including alcohol and other drug use among the general population. In addition, the National Aboriginal and Torres Strait Islander Health Survey (NATSIHS), National Aboriginal and Torres Strait Islander Social Survey (NATSISS) and Australian Aboriginal and Torres Strait Islander Health Survey (AATSIHS) are designed to obtain a representative sample of First Nations people across Australia.

Differences in scope, collection methodology and design may account for variation in estimates reported and comparisons between collections should be made with caution. For a summary of the methodological differences, see Table T1: Methodological differences between surveys [XLSX 20kB].

Data on alcohol and other drug-related hospitalisations

Information about drug-related hospitalisations comes from the National Hospital Morbidity Database (NHMD), an administrative data set containing data from hospitals across Australia and coded to the International Statistical Classification of Diseases and Related Health Problems, Tenth Revision, Australian Modification (ICD-10-AM). 

Data on drug-related hospitalisations are routinely reported by the Australian Institute of Health and Welfare (AIHW) and the National Drug and Alcohol Research Centre (NDARC). NDARC reports a lower number of drug-related hospitalisations than the AIHW due to a number of methodological differences, including:

  • NDARC does not include hospitalisations where the principal diagnosis is related to tobacco or alcohol use, other unspecified drug use and fetal and perinatal conditions. The AIHW includes these principal diagnoses in totals (although fetal and perinatal numbers are not reported separately). 
  • NDARC includes hospitalisations by the state or territory of a patient’s usual residence and do not include cross-border hospitalisations. The AIHW does not provide state/territory disaggregation and includes cross-border hospitalisations.
  • NDARC calculate age-standardised rates in some areas, along with a crude rate as of 30 June of the reference year. The AIHW calculates crude rates only, as of 31 December of the reference year.
  • Both NDARC and the AIHW exclude hospitalisations for which the care type was reported as ‘Newborn without qualified days’, and records for ‘Posthumous organ procurement’ and ‘Hospital boarders’.

For detailed information about the AIHW and NDARC analyses of hospitalisations data, see Australian Institute of Health and Welfare data sources and National Drug and Alcohol Research Centre data sources.

Data on deaths involving alcohol and other drugs

Data on drug-induced deaths are released by the Australian Bureau of Statistics (ABS) annually, using information from the Registrar of Births, Deaths and Marriages in each state and territory, and the National Coronial Information System for deaths certified by a coroner. Causes of death are coded by the ABS to the International Statistical Classification of Diseases and Related Health Problems (ICD). 

Data on deaths involving alcohol and other drugs are released by the ABS within 10 months of the year end (for example, 2023 data were released in October 2024). Additional analysis is undertaken by the National Drug and Alcohol Research Centre (NDARC) and Australian Institute of Health and Welfare (AIHW) and released the following year. For this reason, the latest year of data reported here will sometimes vary. The number of deaths reported across each data source may differ due to variations in data collection purpose, scope, and terminology:

  • The ABS, AIHW and NDARC all use the term “drug-induced deaths” to refer to deaths that are directly attributable to drug use (for example, where drug overdose is the underlying cause of death). Drug-related deaths, where a drug has played a contributory role (for example, a traffic accident), are excluded.
  • The ABS, AIHW and NDARC report drug-induced deaths (excluding deaths solely attributable to alcohol and tobacco) using the drug-induced death tabulation. This tabulation outlines the ICD-10 codes for causes of death attributable to drug-induced mortality. Drug-induced deaths data are reported for the whole of the population across all data sources.
  • The AIHW also reports separately on alcohol-induced and alcohol-related deaths, using the same tabulation for alcohol-induced deaths.
  • Since 2022, the ABS Causes of Death report has referred to mortality data by year of registration (based on the date when the death was registered). In previous years, data was presented by reference year. This change has been applied across the time series in the Causes of Death report. For more information, see Causes of Death, Australia.

For detailed information about the ABS, AIHW and NDARC analyses of mortality data, see Australian Bureau of Statistics data sources, Australian Institute of Health and Welfare data sources and National Drug and Alcohol Research Centre data sources.