Table 2 Inequality measures of ordered dimensions
Inequality dimensions | Inequality measures | Definitions | Formula |
|---|---|---|---|
Economic status Education | Rate difference (d) | Difference of immunization outcomes between the most-advantaged and most-disadvantaged subgroups. | d = Ymax − Ymin |
Rate ratio (r) | Immunization outcomes in the most-advantaged divided by the immunization outcomes in the most-disadvantaged subgroups. | \( r=\frac{Y_{max}}{Y_{min}} \) | |
Relative concentration index (rci) | It is twice the area between the line of equality and the concentration curve. | \( rci=\left(\frac{\sum_j{P}_j\left(2{X}_j-1\right){Y}_j}{\mu}\right)\ast 100 \) |