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A chronic disease score with empirically derived weights

D O Clark1, M Von Korff, K Saunders

  • 1Indiana University Department of Medicine, Indianapolis, USA.

Medical Care
|August 1, 1995
PubMed
Summary
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A refined chronic disease score, using prescription data, improves prediction of healthcare costs and mortality compared to older methods. This empirically derived score offers better general use for severity measurement, especially for predicting mortality.

Area of Science:

  • Health Services Research
  • Medical Informatics
  • Epidemiology

Background:

  • Chronic disease management relies on accurate patient severity assessment.
  • Existing chronic disease scores have limitations in predictive accuracy.
  • Medication data offers a potential basis for improved severity scoring.

Purpose of the Study:

  • To refine and validate a chronic disease score using medication and demographic data.
  • To compare the predictive validity of the revised score against an original score and ambulatory care groups.
  • To determine the optimal weighting for predicting healthcare utilization, costs, and mortality.

Main Methods:

  • Developed a chronic disease score using prescription data, age, and sex with empirically derived weights.

Related Experiment Videos

  • Compared predictive accuracy for healthcare utilization, costs, hospitalization, and mortality using concurrent and prospective models.
  • Validated the score on a separate half-sample of 250,000 managed-care enrollees.

    • Main Results:

    • The revised chronic disease score significantly improved estimation and prediction over the original score.
    • The revised score demonstrated better prospective prediction of mortality than ambulatory care groups.
    • Combined use of the revised score and ambulatory care groups offered only marginal additional predictive power.

    Conclusions:

    • The revised chronic disease score, with empirically derived weights, enhances prediction of healthcare utilization, costs, hospitalization, and mortality.
    • The revised chronic disease score with total cost weights is recommended for general severity assessment due to its superior mortality prediction.
    • Both the revised chronic disease score and ambulatory care groups offer improved prediction over age and sex alone.