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Development and Validation of the Real-World Progression in Diabetes (RAPIDS) Model

Author

Listed:
  • Anirban Basu

    (The Comparative Health Outcomes, Policy, and Economics (CHOICE) Institute, Department of Pharmacy and the Departments of Health Services and Economics, University of Washington, Seattle, WA)

  • Min-Woong Sohn

    (Department of Public Health Sciences, School of Medicine, University of Virginia, Charlottesville, VA)

  • Brian Bartle

    (Center of Innovation for Complex Chronic Healthcare, Hines VA Hospital, Hines, IL)

  • Kwun Chuen Gary Chan

    (Departments of Biostatistics and Health Services, University of Washington, Seattle, WA)

  • Jennifer M. Cooper

    (Section of General Internal Medicine, University of Chicago, Chicago, IL)

  • Elbert Huang

    (Section of General Internal Medicine, University of Chicago, Chicago, IL)

Abstract

Introduction . To develop and validate the first real-world data-based type 2 diabetes progression model (RAPIDS) employing econometric techniques that can study the comparative effects of complex dynamic patterns of glucose-lowering drug use. Methods . The US Department of Veterans Affairs (VA) electronic medical record and claims databases were used to identify over 500,000 diabetes patients in 2003 with up to 9-year follow-up. The RAPIDS model contains interdependent first-order Markov processes over quarters for each of the micro- and macrovascular events, hypoglycemia, and death, as well as predictive models for 8 biomarker levels. Model parameters varied by static demographic factors and dynamic factors, such as age, duration of diabetes, 13 possible glucose-lowering treatment combinations, any blood pressure and any cholesterol-lowering medications, and cardiovascular history. To illustrate model capabilities, a simple comparative study was set up to compare observed treatment use patterns to alternate patterns if perfect adherence is assumed following initiating the use of any of these medications. Results . Data were randomly split into 307,288, 105,195, and 105,081 patients to perform estimation, out-of-sample calibration, and validation, respectively. Model predictions in the validation sample closely aligned with the observed longitudinal trajectory of biomarkers and outcomes. Perfect adherence among initiators increased proportion of days covered by only 6 months. Most of this increase came from increased adherence to monotherapies and did not lead to meaningful changes in any of the outcomes over the 9-year period. Conclusion . Future value of increasing medication adherence among VA patients with diabetes may lie among those who never initiate treatment or are late in initiating treatment. The first-of-its-kind real-world data-based model has the potential to carry out many complex comparative-effectiveness research (CER) studies of dynamic glucose-lowering drug regimens.

Suggested Citation

  • Anirban Basu & Min-Woong Sohn & Brian Bartle & Kwun Chuen Gary Chan & Jennifer M. Cooper & Elbert Huang, 2019. "Development and Validation of the Real-World Progression in Diabetes (RAPIDS) Model," Medical Decision Making, , vol. 39(2), pages 137-151, February.
    • Handle: RePEc:sae:medema:v:39:y:2019:i:2:p:137-151
    DOI: 10.1177/0272989X18817521
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    References listed on IDEAS

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    1. Douglas Staiger & James H. Stock, 1997. "Instrumental Variables Regression with Weak Instruments," Econometrica, Econometric Society, vol. 65(3), pages 557-586, May.
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