Adjusted after-tax income for economic families and persons not in economic families - For economic family members, this refers to economic family after-tax income that has been adjusted by a factor that accounts for family size. The adjustment factor takes into account the lower relative needs of additional family members, as compared to a single person living alone. For use with the NHS income data, the adjusted after-tax income is computed as the economic family after-tax income divided by the square root of family size.
For persons not in economic families, the adjusted after-tax income is set at after-tax income. This is equivalent to a factor of 1.0 for a person not in an economic family.

Decile of adjusted after-tax family income - The deciles divide the population ranked by size of adjusted after-tax family income into 10 groups of equal size. The population in the bottom decile is the one who falls in the lower 10 percent of the adjusted after-tax family income distribution. The population in the top decile is the one who falls in the highest ten percent of the adjusted after-tax family income distribution. The 10 groups were formed with the full population in private households of Canada, whether or not they reported income.