NCDR_CathPCI_AKI

Data extraction and feature engineering

ncdrAKIextract_develop_cohort.R: for main analysis, development cohort
ncdrAKIextract_update_cohort.R: for temporal validation, contemporary cohort

Develop and validate models

ncdrAKImodel_xgboost_permutation.R: permutation selection for xgboost
prediction_performance.R: function to calculate performance measures
ncdrAKImodel_prediction_perfm_develop.R: develop in training and validate in test set for all models
ncdrAKImodel_perfm_results_develop.R: summary of results

Temporal validation

ncdrAKImodel_prediction_perfm_update.R: update models via 4 strategies on contemporary cohort
ncdrAKImodel_perfm_results_update.R: summary of results

Miscellaneous

xgboost_autogrid.R: non-exhaustive grid search for tuning xgboost