Description:
The Index of Household Advantage and Disadvantage (IHAD) provides a summary measure of relative socio-economic advantage and disadvantage for households, based on the characteristics of dwellings and the people living within them, using 2021 Census data.
All in-scope households are ordered from lowest to highest score. A low score indicates relatively greater disadvantage and a lack of advantage in general. A high score indicates a relative lack of disadvantage and greater advantage in general.
This dataset presents IHAD data in quartiles. The lowest 25% of households are given a quartile number of 1, the next lowest 25% of households are given a quartile number of 2 and so on, up to the highest 25% of households which are given a quartile number of 4. This means that households are divided into four equal sized groups, depending on their score. In practice these groups won’t each be exactly 25% of households as it depends on the distribution of the IHAD scores. The data is grouped by Statistical Area Level 3 (SA3 2021). SA3s are defined by the Australian Statistical Geography Standard (ASGS) Edition 3.
Key Attributes:
Field alias
Field name
Description
Statistical Areas Level 3 2021 code
SA3_CODE_2021
2021 Statistical Areas Level 3 (SA3) codes from the Australian Statistical Geography Standard (ASGS), Edition 3. SA3s are designed for the output of regional data.
Statistical Areas Level 3 2021 name
SA3_NAME_2021
2021 Statistical Areas Level 3 (SA3) names from the Australian Statistical Geography Standard (ASGS), Edition 3. SA3s are designed for the output of regional data.
Area in square kilometres
AREA_ALBERS_SQKM
The area of a region in square kilometres, based on the Albers equal area conic projection.
IHAD quartile 1
IHAD_QUARTILE1
Proportion of in-scope dwellings in the SA3 that fall into IHAD quartile 1, indicating relatively greater disadvantage and lack of advantage in general.
IHAD quartile 2
IHAD_QUARTILE2
Proportion of in-scope dwellings in the SA3 that fall into IHAD quartile 2.
IHAD quartile 3
IHAD_QUARTILE3
Proportion of in-scope dwellings in the SA3 that fall into IHAD quartile 3.
IHAD quartile 4
IHAD_QUARTILE4
Proportion of in-scope dwellings in the SA3 that fall into IHAD quartile 4, indicating a relative lack of disadvantage and greater advantage in general.
Occupied private dwellings
OPD_2021
Dwellings in-scope of the IHAD i.e. classifiable occupied private dwellings.
SEIFA IRSAD quartile
IRSAD_QUARTILE
Index of Relative Socio-economic Advantage and Disadvantage quartile. All SA3s are ordered from lowest to highest score, the lowest 25% of SA3s are given a quartile number of 1, the next lowest 25% of SA3s are given a quartile number of 2 and so on, up to the highest 25% of SA3s which are given a quartile number of 4. This means that SA3s are divided into four equal sized groups, depending on their score. In practice these groups won’t each be exactly 25% of SA3s as it depends on the distribution of SEIFA scores.
Usual resident population
URP_2021
Population counts in this column are based on place of usual residence as reported on Census Night. These include persons out of scope of the IHAD.
Dwellings
DWELLING
Total dwellings at Census time, including dwellings out of scope of the IHAD e.g. unoccupied private dwellings.
Summing proportions
Proportional totals may not equal 100% due to rounding and random adjustments made to the data. When calculating proportions, percentages, or ratios from cross-classified or small area tables, the random error introduced can be ignored except when very small cells are involved, in which case the impact on percentages and ratios can be significant. Refer to the Introduced random error / perturbation Census page on the ABS website for more information.
Data and geography references
Source data publication: Index of Household Advantage and Disadvantage
Geographic boundary information: Australian Statistical Geography Standard (ASGS) Edition 3
Further information: Index of Household Advantage and Disadvantage methodology
Source: Australian Bureau of Statistics (ABS)
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