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. Author manuscript; available in PMC: 2013 Jun 13.
Published in final edited form as: Vital Health Stat 2. 2005 Jul;(141):1–16.

Table H.

Percentages in fair or poor health by income level and regression-based summary indices of disparity for three hypothetical populations

Population 1
 Population 2
 Population 3
Income level Percent in
fair or
poor health		 Proportion
of
population		 Percent in
fair or
poor health		 Proportion
of
population		 Percent in
fair or
poor health		 Proportion
of
population
Poor1 30 0.05 30 0.05 30 0.2
Near poor2 20 0.15 20 0.15 20 0.2
Middle income3 15 0.60 5 0.60 15 0.4
High income4 5 0.20 15 0.20 5 0.2
  Regression-based summary index of disparity
SII5 −22 −10 −29
RII6(mean) −1.54 −0.94 −1.70
RII6(ratio) 7.7 2.8 12.5
1

Poor is income less than 100 percent of the poverty threshold.

2

Near poor is 100 to less than 200 percent of the poverty threshold.

3

Middle income is between 200 and less than 400 percent of the poverty threshold.

4

High income is 400 percent or more of the poverty threshold.

5

SII is Slope Index of Inequality.

6

RII is Relative Index of Inequality.