Table 2

Tobacco expenditure (A$) by quintile of household income

Income quintile*
12345All householdsP for χ2or F†
Source: 1998–99 Household Expenditure Survey, Australian Bureau of Statistics.
*First quintile represent lowest level of income and fifth quintile represent highest level of income.
†The tobacco expenditure variables have a J shaped distribution in the full sample. Thus before examining their relationship with income, they were trichotomised. The reported χ2 pertains to the cross tabulation of these variables and income quintiles. The tobacco expenditure variables have a positively skewed distribution in the part of the sample limited to smoking households. To test for the significance of their relationship with income, they were first transformed to a natural logarithmic scale. The reported significant of F statistic pertains to the regression of the logarithm of tobacco expenditure variables on income.
All households (n=6892)
Average weekly tobacco expenditure8.619.4512.1812.1011.3110.73<0.001
Average weekly per person tobacco expenditure4.683.774.765.305.494.80<0.001
Households reporting tobacco expenditure (n=2291)
Average weekly tobacco expenditure26.0929.8936.2734.5934.4632.32<0.001
Average weekly per person tobacco expenditure14.2011.9414.1715.1616.7214.460.004