training_summary.json

{
  "model": "Random Forest Classifier",
  "task": "Hospital 30-Day Readmission Risk Prediction",
  "timestamp": "2025-12-15 19:30:35",
  "environment": "kaggle",
  "sklearn_version": "1.2.2",
  "device": "cpu",
  "evaluation_pipeline": {
    "description": "Robust nested CV with final holdout",
    "k_folds": 5,
    "uses_bootstrap": true,
    "uses_oob_score": true
  },
  "data": {
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    "development_size": 86501,
    "final_test_size": 15265,
    "n_features": 113
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  "best_params": {
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    "max_depth": null,
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    "min_samples_leaf": 4,
    "max_features": "sqrt",
    "class_weight": {
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    "bootstrap": true,
    "oob_score": true
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  "cross_validation": {
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    "fold_scores": [
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  "final_test_metrics": {
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    "pr_auc": 0.36408932414480305,
    "precision": 0.35404191616766467,
    "recall": 0.5551643192488263,
    "f1": 0.4323583180987203,
    "accuracy": 0.8372748116606616,
    "balanced_accuracy": 0.7139437848732886,
    "sensitivity": 0.5551643192488263,
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    "ppv": 0.35404191616766467,
    "npv": 0.9398078297466846,
    "fpr": 0.1272767495022491,
    "fnr": 0.4448356807511737,
    "true_positives": 946,
    "true_negatives": 11835,
    "false_positives": 1726,
    "false_negatives": 758,
    "brier_score": 0.1018540864871197
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  "hyperparameter_search_time_seconds": 19142.03841161728,
  "total_time_seconds": 20619.085399627686
}