Notes on the data: Hospital admissions

Same-day admissions for dialysis for kidney disease, 2016/17


Policy context:  Same-day admissions for dialysis for kidney disease account for a large proportion of same-day admissions, particularly for Indigenous Australians, who were admitted for dialysis at 13 times the rate for other Australians in 2016-17 [1]. In 2016/17, same-day admissions for dialysis represented 76% of all same-day admissions for Indigenous Australians, however when excluding separations for dialysis, Indigenous Australians had lower same-day separation rates than other Australians in New South Wales, Queensland, Western Australia and South Australia.


  1. Australian Institute of Health and Welfare (AIHW). Australian hospital statistics 2016-17. Health services series no. 84. (Cat. no. HSE 201.) Canberra: AIHW; 2018



WA Health have advised that same-day dialysis activity in WA which was contracted to private facilities, but funded by public hospitals, has been double-counted in data published for recent years. The corrected data are being compiled and will be published in February 2020. The data items affected are:

  • Same-day admissions for dialysis for kidney disease - Public and All hospitals


The data presented are of the number of same-day admissions for dialysis for kidney disease, including both haemodialysis and peritoneal dialysis, International Classification of Disease (ICD-10-AM) codes Z49.1 and Z49.2. There are two main types of dialysis: peritoneal, which occurs inside the body and can be performed almost anywhere, usually in the home setting; and haemodialysis, which occurs outside the body and is most often conducted in a hospital or satellite setting. The reason for presenting these data separately from overnight admissions is that they represent many repeat visits by a relatively small number of patients, who may have multiple admissions in a week. Their inclusion with other (overnight) admissions can dramatically alter the geographic distribution of these other categories of admissions. This is particularly evident in regional and remote areas, where dialysis facilities are located, and where those using them may have moved to live to be near the facility.

Confidentiality of data

Counts of fewer than five admissions have been suppressed.

Data were not available for private dialysis units in Queensland, Tasmania, the Northern Territory or the Australian Capital Territory, to protect the confidentiality of the small number of private facilities in these jurisdictions. As a result, where data are published for public dialysis units and all dialysis units, the ‘all units’ data for these jurisdictions have also been confidentialised, as their publication would allow identification of the confidentialised private dialysis units. The ‘all units’ data in other jurisdictions have also been confidentialised where publication of public and all units data would allow identification of private hospital data confidentialised due to small cell sizes. The decision was made to confidentialise the ‘all units’ rather than the ‘public’ figure as admissions to public dialysis units comprise the majority of admissions, both overall and from the most disadvantaged areas.

All hospital admissions where addresses were unknown are included in the Australian total and are not represented by State/Territory.


Geography: Data available by Population Health Area, Local Government Area, Primary Health Network, Quintiles and Remoteness Areas


Numerator:  Same-day admissions for same-day dialysis for kidney disease (Z491 to Z492)


Denominator:  Total population, average of 30 June 2016 and 2017 (ERP)


Detail of analysis:  Indirectly age-standardised rate per 100,000 population; and/or indirectly age-standardised ratio, based on the Australian standard.


Source:  Compiled by PHIDU using data from the Australian Institute of Health and Welfare, supplied on behalf of State and Territory health departments for 2016/17; and the ABS Estimated Resident Population, 30 June 2016

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