Table A1. Results of a principal components analysis of the Index of Relative Socioeconomic Disadvantage (IRSD) from the 2006 Australian Bureau of Statistics Socio-economic Index for Areas (SEIFA).

Census variable, %…	Factor loadings
…Occupied private dwellings with no Internet connection	0.85
…Employed people classified as Labourers	0.76
…People aged 15 years and over with no post-school qualifications	0.76
…People with stated annual household equivalised income between $13,000 and $20,799 (approx. 2nd and 3rd deciles)	0.76
…Households renting from a Government or Community organisation	0.70
…People (in the labour force) unemployed	0.70
…Families that are one parent families with dependent offspring only	0.67
…Households paying rent who pay less than $120 per week (excluding $0 per week)	0.67
…People aged under 70 who have a long-term health condition or disability and need assistance with core activities	0.61
…Occupied private dwellings with no car	0.57
…People who identified themselves as being of Aboriginal and/or Torres Strait Islander origin	0.52
…Occupied private dwellings requiring one or more extra bedrooms (based on Canadian National Occupancy Standard)	0.52
…People aged 15 years and over who are separated or divorced	0.51
…Employed people classified as Machinery Operators and Drivers	0.51
…People aged 15 years and over who did not go to school	0.44
…Employed people classified as Low Skill Community and Personal Service Workers	0.44
…People who do not speak English well	0.33
Eigenvalue	06.62
% variance explained	39.00

From: B. Pink (2008). Socioeconomic Indexes for Areas – Technical Paper 2006, Australian Bureau of Statistics.