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. 2009 Dec 15;7(1):A16.

Figure 1.

Example of disparity scoring for infant mortality, Health of Wisconsin Report Card.

  Mortality Rate Subgroup Grade Value of Grade Difference From Best Grade (A = 4)
Infants (aged <1 y)
Sex Male   6.9 C 2 2
Female 6.2 B 3 1
Education of mother High school or less 9.0 D 1 3
Some college/technical school 5.7 B 3 1
College graduate 3.9 A 4 0
Type of county Large urban 10.3 F 0 4
Suburban/urban 4.8 A 4 0
Nonurban 5.7 B 3 1
Rural 7.0 C 2 2
Race/ethnicity African American/black 17.6 F 0 4
Asian 7.5 C 2 2
Native American 9.0 D 1 3
Non-Hispanic white 5.1 B 3 1
Total 24
 
[Sum of differences from table above] ÷ (Total no. of subgroup grades minus 1)] ÷ Adjustment constant (transform to percentage) = Life-stage disparity score Life-stage disparity grade
[24 ÷ 12] ÷ 4 = 50% D
Disparity grading scale
Disparity score Grade Interpretation
<15% A Very good
15%-30% B Good
30%-45% C Fair
45%-60% D Poor
>60% F Failing