Beta-binomial regression and bimodal utilization.
Ontology highlight
ABSTRACT: Objective
To illustrate how the analysis of bimodal U-shaped distributed utilization can be modeled with beta-binomial regression, which is rarely used in health services research.Data sources/study setting
Veterans Affairs (VA) administrative data and Medicare claims in 2001-2004 for 11,123 Medicare-eligible VA primary care users in 2000.Study design
We compared means and distributions of VA reliance (the proportion of all VA/Medicare primary care visits occurring in VA) predicted from beta-binomial, binomial, and ordinary least-squares (OLS) models.Principal findings
Beta-binomial model fits the bimodal distribution of VA reliance better than binomial and OLS models due to the nondependence on normality and the greater flexibility in shape parameters.Conclusions
Increased awareness of beta-binomial regression may help analysts apply appropriate methods to outcomes with bimodal or U-shaped distributions.
SUBMITTER: Liu CF
PROVIDER: S-EPMC3796113 | biostudies-literature | 2013 Oct
REPOSITORIES: biostudies-literature
Publications
Beta-binomial regression and bimodal utilization.
Liu Chuan-Fen CF Burgess James F JF Manning Willard G WG Maciejewski Matthew L ML
Health services research 20130323 5
<h4>Objective</h4>To illustrate how the analysis of bimodal U-shaped distributed utilization can be modeled with beta-binomial regression, which is rarely used in health services research.<h4>Data sources/study setting</h4>Veterans Affairs (VA) administrative data and Medicare claims in 2001-2004 for 11,123 Medicare-eligible VA primary care users in 2000.<h4>Study design</h4>We compared means and distributions of VA reliance (the proportion of all VA/Medicare primary care visits occurring in VA) ...[more]
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