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Using the landmark method for creating prediction models in large datasets derived from electronic health records

Author

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  • Brian Wells

  • Kevin Chagin
  • Liang Li
  • Bo Hu
  • Changhong Yu
  • Michael Kattan

Abstract

With the integration of electronic health records (EHRs), health data has become easily accessible and abounded. The EHR has the potential to provide important healthcare information to researchers by creating study cohorts. However, accessing this information comes with three major issues: 1) Predictor variables often change over time, 2) Patients have various lengths of follow up within the EHR, and 3) the size of the EHR data can be computationally challenging. Landmark analyses provide a perfect complement to EHR data and help to alleviate these three issues. We present two examples that utilize patient birthdays as landmark times for creating dynamic datasets for predicting clinical outcomes. The use of landmark times help to solve these three issues by incorporating information that changes over time, by creating unbiased reference points that are not related to a patient’s exposure within the EHR, and reducing the size of a dataset compared to true time-varying analysis. These techniques are shown using two example cohort studies from the Cleveland Clinic that utilized 4.5 million and 17,787 unique patients, respectively. Copyright Springer Science+Business Media New York 2015

Suggested Citation

  • Brian Wells & Kevin Chagin & Liang Li & Bo Hu & Changhong Yu & Michael Kattan, 2015. "Using the landmark method for creating prediction models in large datasets derived from electronic health records," Health Care Management Science, Springer, vol. 18(1), pages 86-92, March.
    • Handle: RePEc:kap:hcarem:v:18:y:2015:i:1:p:86-92
    DOI: 10.1007/s10729-014-9281-3
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    References listed on IDEAS

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    1. van Buuren, Stef & Groothuis-Oudshoorn, Karin, 2011. "mice: Multivariate Imputation by Chained Equations in R," Journal of Statistical Software, Foundation for Open Access Statistics, vol. 45(i03).
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