In collaboration with Dr Callie Little at the University of New England, TRA has utilised twin postal address data to gather geospatial information on all TRA-registered twins who have completed the Health and Lifestyle Questionnaire. This data is saved in an electronically secure de-identified format which can be made available to researchers for ethically approved projects.

The data

Each twin’s postal address as of 2018 was geocoded to gather x,y coordinates. From there we have identified Australian Statistical Geography Standard (ASGS) 2016 ABS structure indicators and ABS socioeconomic status indicators, including:

  • Statistical Area Level 1 (SA1)
  • Statistical Area Level 2 (SA2)
  • Statistical Area Level 3 (SA3)
  • Statistical Area Level 4 (SA4)
  • Greater Capital City Statistical Areas (GCCSA)
  • Socio-Economic Indexes for Areas (SEIFA)
  • Index of Relative Socio-economic Disadvantage (IRSD)
  • Index of Relative Socio-economic Advantage and Disadvantage (IRSAD)
  • Index of Economic Resources (IER)
  • Index of Education and Occupation (IEO)

This TRA resource can be used for determining area level socioeconomic status or calculating the distance to the closest public resource (eg hospital, park, lake), or other particular locations.

For more information and to discuss your project requirements please contact Twins Research Australia’s research liaison and coordinator, Jessica Tyler, at This email address is being protected from spambots. You need JavaScript enabled to view it..

Twins Research Australia

Address: 3/207 Bouverie St
Carlton, Vic 3010


ABN: 84 002 705 224

Twins Research Australia has received continuous funding from the National Health and Medical Research Council (NHMRC) since 1981, most recently through a Centre of Research Excellence Grant (2015-2022). TRA is administered by the University of Melbourne.

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