Comparison of Ferguson's δ and the Gini coefficient used for measuring the inequality of data related to health quality of life outcomes.

ABSTRACT: BACKGROUND:Ferguson's δ and Gini coefficient (GC) are defined as contrasting statistical measures of inequality among members within populations. However, the association and cutting points for these two statistics are still unclear; a visual display is required to inspect their similarities and differences. METHODS:A simulation study was conducted to illustrate the pertinent properties of these statistics, along with Cronbach's α and dimension coefficient (DC) to assess inequality. We manipulated datasets containing four item lengths with two number combinations (0 and 33%) in item length if two domains exist. Each item difficulty with five-point polytomous responses was uniformly distributed across a ± 2 logit range. A simulated response questionnaire was designed along with known differ

SUBMITTER: Wang HY 

PROVIDER: S-EPMC7189694 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature