The Data Linkage BranchThe specialist team at the Department of Health who are responsible for developing and maintaining the WA Data Linkage System, performing data linkage, and the facilitation of access to linked data. provides many value-adding features for dataCan refer to: (1) the demographic data used in the Data Linkage process; or (2) information pertaining to services provided to people or their clinical information (available only from Data Custodians, including via CARES). extractions. These value-adds have been developed over time and in many cases are unique initiatives of the DLBData Linkage Branch: the specialist team at the Department of Health who are responsible for developing and maintaining the WA Data Linkage System, performing data linkage, and the facilitation of access to linked data..

Geographical Information

GeocodingThe process of assigning a geographical coordinate to a named feature. In the case of the feature being a street address, the address must first be matched to a known address in a spatially referenced dataset such as those maintained by Landgate (in WA) and Australia Post. Once a geographical coordinate has been assigned to the feature, census statistical areas (SA1, SA2, LGA) can be derived. involves assigning a map reference point (a combination of latitude and longitude) to an address, which can then be used to assign derived geographic boundaries (e.g. CD, SLA, LGA, SA1 and SA2) and indices (e.g. SEIFASocio-Economic Indexes for Area. These values are assigned to geocoded areas and measure socioeconomic conditions. SEIFA codes can be assigned using 1996, 2001 and 2006 ABS census data. and remoteness score).

The DLB currently has data for census years 1996, 2001, 2006 and 2011. Additional information is available in the Geographical Information downloads area.

Family Connections

The WA Family Connections System contains links between individuals who are related, i.e. biologically (by birth) or legally (such as by marriage). The links are created using information recorded on original birth, death and marriage registrations as well as other sources. No information is known about adoptions, including step, local or overseas adoptions.

Currently, the genealogy held by the Data LinkageA complex technique for connecting data records within and between datasets using demographic data (e.g. name, date of birth, address, sex, medical record number). Also called ‘Record Linkage’ or ‘Linkage’. Branch includes parents and siblings of people born in WA since 1974.  Extended family members (including grandparents, grandchildren, cousins, aunts and uncles) can also be identified.

The availability of Family Connections information arose from the WA Family Connections Project, which has been operating since 2003.

Indigenous Status Flag

Based on the work of the Getting Our Story Right (GOSR) project, the WA Data Linkage Branch has created an Indigenous Status Flag. A validated algorithm was used to create this flag for each individual with one or multiple data records held in one or multiple WA government administrative data sets. Data recipients must note that their project could receive data for an individual where data sets provided report an Indigenous Status of NO but the Indigenous Status Flag is YES. The Indigenous Status Flag indicates what status is indicative of a person from all available collections/records and therefore may be different to what is reported in a specific record or collection.

To request the Indigenous Status Flag for a project, please tick the Request box in Section 9.1 Project Data of the Application for Data Form.