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Cross-Validation Tutorial: Predictive Modeling in Healthcare


This open-source respository contains the applied demonstration of cross-validation methods for healthcare problems associated with our recent publication: Practical Considerations and Applied Examples of Cross-Validation for Model Development and Evaluation in Health Care: Tutorial (https://ai.jmir.org/2023/1/e49023). Our work outlines the funadmental approach of cross-validation for model evaluation and model selection with a focus on applied predictive modeling in healthcare. We offer an applied demonstration of cross-validation best practices with exemplar problems in classification (in-hospital morality prediction) and regression (length-of-stay prediction) using the widely available MIMIC-III dataset.

We also list the following sources we found helpful.

Coding resources for implementing CV/Nested CV:

  1. https://github.com/casperbh96/Nested-Cross-Validation/blob/master/nested_cv/nested_cv.py [Python Version]
  2. https://github.com/stephenbates19/nestedcv_experiments [R Version]

NOTE: for Number [2] - This method was introduced in the paper Cross-validation: what does it estimate and how well does it do it? by Stephen Bates, Trevor Hastie, and Robert Tibshirani, available at https://arxiv.org/abs/2104.00673

Resources for MIMIC/eICU:

  1. MIMIC/MIT Website with Docs/Code Links: https://mimic.mit.edu/
  2. Code for building MIMIC Datasets: https://github.com/MIT-LCP/mimic-code (MIMIC-III or MIMIC-IV Ideal - Google BQ vs. Postgres)
  3. https://github.com/clinicalml/ML-tools/tree/master/MIMIC-tools (Benchmarks & Modeling)
  4. https://github.com/MIT-LCP/mimic-workshop (Tutorial used for MIMIC workshop/bookcamp)
  5. https://github.com/GoogleCloudPlatform/healthcare/blob/master/datathon/mimic_eicu/tutorials/ (Google

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