Indicators of health are measured in terms of rates, percentages, proportions, means, or other quantifiable measures
such as life expectancy. These measures can be calculated for each group in a domain of groups. A domain is a set of groups defined in terms of a specific characteristic of persons in a population. Ideally, the set of groups is mutually exclusive and exhaustive (that is, each person in the population is assigned to only one group, and all persons in the population are assigned to a group). For example, the domain of gender consists of males and females.
Disparities become evident when quantitative measures of health (rates, percentages, etc.) are compared between the groups in a domain. These measures permit comparisons between groups regardless of the number of persons in the group. Disparities are frequently measured between groups in a domain; however, disparities can also be measured from other reference points such as the total population.
- http://www.cdc.gov/nchs/data/series/sr_02/sr02_141.pdf -
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