Income quintile* | |||||||
---|---|---|---|---|---|---|---|

1 | 2 | 3 | 4 | 5 | All households | P for χ^{2}or 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 χ^{2} 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 expenditure | 8.61 | 9.45 | 12.18 | 12.10 | 11.31 | 10.73 | <0.001 |

Average weekly per person tobacco expenditure | 4.68 | 3.77 | 4.76 | 5.30 | 5.49 | 4.80 | <0.001 |

Households reporting tobacco expenditure (n=2291)
| |||||||

Average weekly tobacco expenditure | 26.09 | 29.89 | 36.27 | 34.59 | 34.46 | 32.32 | <0.001 |

Average weekly per person tobacco expenditure | 14.20 | 11.94 | 14.17 | 15.16 | 16.72 | 14.46 | 0.004 |