Australian Institute of Health and Welfare (2022) Undetermined intent, AIHW, Australian Government, accessed 11 August 2022.
Australian Institute of Health and Welfare. (2022). Undetermined intent. Retrieved from https://www.aihw.gov.au/reports/injury/undetermined-intent
Undetermined intent. Australian Institute of Health and Welfare, 16 June 2022, https://www.aihw.gov.au/reports/injury/undetermined-intent
Australian Institute of Health and Welfare. Undetermined intent [Internet]. Canberra: Australian Institute of Health and Welfare, 2022 [cited 2022 Aug. 11]. Available from: https://www.aihw.gov.au/reports/injury/undetermined-intent
Australian Institute of Health and Welfare (AIHW) 2022, Undetermined intent, viewed 11 August 2022, https://www.aihw.gov.au/reports/injury/undetermined-intent
Get citations as an Endnote file:
In cases where the cause of injury is known but it is not clear if the act was accidental or intentional, hospital and death records can be coded to identify that the intent was undetermined.
In 2019–20, injuries of undetermined intent resulted in about:
17.4 per 100,000 population
1.0 per 100,000 population
This represents 0.8% of injury hospitalisations and 2% of injury deaths.
The most frequent causes of injury hospitalisations of undetermined intent in 2019–20 were various kinds of poisoning, and contact with blunt objects (Table 1).
Poisoning by and exposure to antiepileptic, sedative-hypnotic, antiparkinsonism and psychotropic drugs, not elsewhere classified (Y11)
Poisoning by and exposure to narcotics and psychodysleptics [hallucinogens], not elsewhere classified (Y12)
Other poisoning (Y10, Y13–Y19)
Total poisoning (Y10–Y19)
Contact with blunt objects (Y29)
Other (Y20–Y28, Y30–Y34)
Source: AIHW National Hospital Morbidity Database.
For more detail, see Data tables B33–34.
The most frequent causes of injury death in this category in 2019–20 were various kinds of poisoning (Table 2).
Hanging, strangulation, suffocation, drowning and submersion (Y20-Y21)
Crashing of motor vehicle (Y32)
Other (Y22–Y31, Y33–34)
Source: AIHW National Mortality Database.
For more detail, see Data tables E45–47.
Hospital admissions due to injuries of undetermined intent do not appear to exhibit a seasonal pattern, remaining relatively steady throughout the year.
In March 2020, the first lockdowns and social distancing measures associated with COVID-19 interrupted the usual activity of many Australians. It’s not clear if COVID-19 had a particular effect on the number of admissions to hospital with injuries of undetermined intent. There were 2.7% more cases from March to May than the same period of the previous year (Figure 1).
See the interactive COVID-19 display for data and further discussion about the impact of COVID-19 on hospital admissions.
Rates of hospitalised injury of undetermined intent in 2019–20 were highest in the 15–24 age group, and higher for males. Rates of death were highest in the 25–44 age group (Figure 2):
The visualisation features 2 matching column graphs on separate tabs, 1 for hospitalisations and 1 for deaths. The columns represent sex within 6 life-stage age groups. The reader can select to display either age-specific rate per 100,000 population or number. The default displays males and females and the reader can also select to display persons.
For more detail, see Data tables A1–3 and D1–3.
There are many ways that the severity, or seriousness, of an injury can be assessed. Using available data, three measures of the severity of hospitalised injuries are:
The average number of days in hospital for injuries in this category was less than the average for all hospitalised injuries, but the percentage of cases that included time in an ICU or involved continuous ventilatory support were much higher than for all hospitalised injuries in 2019–20 (Table 3).
All hospitalised injuries
Average number of days in hospital
% of cases with time in an ICU
% of cases involving ventilator
Note: Average number of days in hospital (length of stay) includes admissions that are transfers from 1 hospital to another or transfers from 1 admitted care type to another within the same hospital, except where care involves rehabilitation procedures.
In 2019–20, among Aboriginal and Torres Strait Islander people:
Rate (per 100,000)
Note: Rates are crude per 100,000 population.
In 2019–20, Indigenous Australians were 3.7 times as likely as non-Indigenous Australians to be hospitalised with injuries of undetermined intent (Table 6).
The age-specific rate of injury hospitalise of undetermined intent was highest among the 25–44 life-stage age group for Indigenous Australians and the 15–24 age group for non-Indigenous Australians (Figure 3). Deaths data are not presented because of small numbers.
The visualisation features a column graph for hospitalisations. The columns represent data for Indigenous and non-Indigenous Australians by 6 life-stage age groups. The reader can select to display age-specific rate per 100,000 population or number. The reader can also select to display data for persons, males or females.
For more detail, see Data tables A4–A6 and D4–D8.
In 2019–20, people living in Remote areas, compared with people living in Major cities, were:
Note: Rates are age-standardised per 100,000 population.
The highest age-specific rate of hospitalisations of undetermined intent was among the 15–24 age group living in Remote areas of Australia. (Figure 4).
Deaths data are not presented here because of small numbers.
The visualisation features a column graph for hospitalisations. The columns represent data for each of the 5 remoteness categories by 6 life-stage age groups. The reader can select to display age-specific rate per 100,000 population or number. The reader can also select to display data for persons, males or females.
For more detail, see Data tables A7–9 and D9–10.
For information on how statistics by remoteness are calculated, see the Technical notes.
Defining injury hospitalisations and deaths: how injuries were counted
Technical notes: how the data were calculated
Data tables: download the full tables
ACCD (Australian Consortium for Classification Development) 2019. The international statistical classification of diseases and related health problems, 10th revision, Australian modification (ICD-10-AM), 11th edn. Tabular list of diseases and alphabetic index of diseases. Adelaide: Independent Hospital Pricing Authority (IHPA), Lane Publishing.
The following are publications from recent years. See Reports for any older publications that may exist.
The first year of COVID-19 in Australia: direct and indirect health effects
Trends in hospitalised injury, Australia, 2007–08 to 2016–17
Trends in injury deaths, Australia, 1999–00 to 2016–17
Hospitalised injury and socioeconomic influence in Australia, 2015–16
Injury mortality and socioeconomic influence in Australia, 2015–16
Indigenous injury deaths, 2011–12 to 2015–16
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