NHAMCS-ED: The Hard Part of Clinical AI Is Not the Model

NHAMCS-ED looks almost ideal for clinical AI experiments: it combines structured emergency department visit variables with short reason-for-visit text. But it is a national probability survey, not a hospital EHR extract. Across my IV fluid utilization and hospital admission prediction projects, the biggest lesson was that the hard part is often not the model itself; it is deciding what the model is allowed to know, what the data actually represent, and what claims the analysis can support. ...

June 22, 2026 · Hairong

SHAP Explains the Model, Not the Patient

SHAP Explains the Model, Not the Patient In clinical AI papers, I often see SHAP plots used as if they explain the disease process itself. The figure may look technical and persuasive, but the interpretation often goes too far: “This variable has a high SHAP value, so it is an important clinical cause.” That is usually not justified. SHAP is useful. It can show what a trained model relied on when making a prediction. But its boundary should be clear: ...

June 21, 2026 · Hairong