Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Regularization and Hierarchical Prior Distributions for Adjustment with
  Health Care Claims Data: Rethinking Comorbidity Scores   Health care claims data refer to information generated from interactions
within health systems. They have been used in health services research for
decades to assess effectiveness of interventions, determine the quality of
medical care, predict disease prognosis, and monitor population health. While
claims data are relatively cheap and ubiquitous, they are high-dimensional,
sparse, and noisy, typically requiring dimension reduction. In health services
research, the most common data reduction strategy involves use of a comorbidity
index -- a single number summary reflecting overall patient health. We discuss
Bayesian regularization strategies and a novel hierarchical prior distribution
as better options for dimension reduction in claims data. The specifications
are designed to work with a large number of codes while controlling variance by
shrinking coefficients towards zero or towards a group-level mean. A comparison
of drug-eluting to bare-metal coronary stents illustrates approaches. In our
application, regularization and a hierarchical prior improved over comorbidity
scores in terms of prediction and causal inference, as evidenced by
out-of-sample fit and the ability to meet falsifiability endpoints.

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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-ph
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The categories of this paper are: q-bio
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The categories of this paper are: atom-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: gr-qc
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-ex
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The categories of this paper are: hep-lat
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The categories of this paper are: ao-sci
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The categories of this paper are: quant-ph
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The categories of this paper are: eess
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The categories of this paper are: q-fin
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The categories of this paper are: acc-phys
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The categories of this paper are: cond-mat
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The categories of this paper are: cs