Australian Institute of Health and Welfare (2021) Health service use for patients with traumatic brain injury, AIHW, Australian Government, accessed 31 January 2023.
Australian Institute of Health and Welfare. (2021). Health service use for patients with traumatic brain injury. Retrieved from https://www.aihw.gov.au/reports/injury/treatment-pathways-brain-injury
Health service use for patients with traumatic brain injury. Australian Institute of Health and Welfare, 09 December 2021, https://www.aihw.gov.au/reports/injury/treatment-pathways-brain-injury
Australian Institute of Health and Welfare. Health service use for patients with traumatic brain injury [Internet]. Canberra: Australian Institute of Health and Welfare, 2021 [cited 2023 Jan. 31]. Available from: https://www.aihw.gov.au/reports/injury/treatment-pathways-brain-injury
Australian Institute of Health and Welfare (AIHW) 2021, Health service use for patients with traumatic brain injury, viewed 31 January 2023, https://www.aihw.gov.au/reports/injury/treatment-pathways-brain-injury
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The NIHSI AA v0.5 is limited to data from 1 June 2010 to 30 July 2017.
There are known data gaps within some of the Australian health care data landscape that affect the NIHSI AA.
Emergency department presentation data
The initial proposal for this project included the identification of TBI cases presenting to emergency departments. However, this approach was abandoned due to difficulties in defining TBI cases in the ED data due to:
These issues may result in an under- or over-estimate of TBI cases presenting to emergency departments. Therefore, ED presentations were not used to define the cohort for this study.
Other data gaps
Other current data gaps in the Australian health care system include health care services provided in primary care settings, such as general practice; allied health care settings, such as private practice physiotherapy or occupational therapy; and outpatient specialist clinic settings. No information on services provided in these settings is currently included in the NIHSI AA.
Not all records with an initial TBI admission in the NHMD between 1 July 2013 and 30 June 2015 were linked in the NIHSI AA. Some records were discarded from the analysis due to lack of data needed for data linkage.
In the NDI data, one person’s death was reported more than 2 years before the TBI event. Therefore, linkage of later hospitalisations, MBS and PBS data for this person was probably due to a false match during the data linkage process. The record was retained in the cohort, but the death was not counted as an outcome.
One person died on the day before the initial admission (a same-day hospitalisation “Died” as the separation mode). The disparity between the two dates was taken to be an artefact of the calculation of the admission date difference in the hospital content table in NIHSI AA. This record was retained in the cohort, and the death was counted as an outcome.
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