At the centre of the TDLU's system is a Master Linkage Map (MLM) which groups together records for individuals from the Tasmanian population. This map enables the extraction of de-identified linked files representative of multiple data sources. By adding an anonymous person identifier, the map can be used for a range of research and planning purposes.

The MLM is a simple structure; it contains a list of individual record ID's, which each point to a specific record in one of the participating datasets. A unique Master Linkage Key (MLK) identifier is associated with every record and all records with the same MLK are considered to belong to the same individual.

The MLM defines clusters of episodes, each of which refers to a distinct person. Importantly, the MLM does not contain any health or identifying information about individuals; the TDLU only ever receives basic demographic information for the purposes of linking only.

The following datasets have been linked into the MLM and are available for research subject to relevant approvals.

Dataset

Date Range of Data Available

Tasmanian Public Hospital Admitted Patient Episodes

1/1/2007 – 31/12/2016

Tasmanian Public Hospital Emergency Department Presentations

1/1/2000 – 31/12/2016

Tasmanian Deaths Registry

1/1/1970 – 31/12/2015

Tasmanian Births Registry

1/1/2000 – 31/12/2014

*Tasmanian Cancer Registry

1/1/1982 – 31/12/2013

Tasmanian Public Hospital Perinatal Data Collection

1/1/2005 – 31/12/2014

Tasmanian Private Hospital Perinatal Data Collection

1/1/2005 – 31/12/2014

Australian Early DeveIopment Index (AEDI)

2009, 2012, 2015

Ambulance Tasmania Emergency Incidents

1/1/2010 – 31/12/2015
Tasmanian Community Mental Health Data Collection2000 - 2015

*Subject to approval