MedError: A Machine-Assisted Framework for Systematic Error Analysis in Clinical Concept Extraction

Area of Science:

• Medical Informatics
• Natural Language Processing
• Clinical Data Science

Background:

• Error analysis is crucial for clinical concept extraction models, a key task in clinical natural language processing (NLP).
• Current error analysis lacks standardization, requiring expert judgment and hindering reproducibility.
• Clinical text variability complicates model evaluation.

Purpose of the Study:

• To develop and validate MedError, a novel framework for systematic and enhanced error analysis in clinical concept extraction.
• To standardize the process of evaluating clinical NLP models through a machine-assisted, human-in-the-loop approach.

Main Methods:

• Collected and curated 1,187 unique errors from 4,237 clinical notes across three hospitals.
• Defined error categories using a validated taxonomy, classifying 480 false negatives and 707 false positives.
• Evaluated large language models (LLMs) for automatic error classification and developed the MedError framework with a user-friendly interface.

Main Results:

• MedError integrates LLM-assisted classification and reasoning for efficient, reproducible, and context-aware error analysis.
• The framework supports both single-site and federated multi-site analysis.
• Successfully classified errors across 25 types and 48 clinical concept categories.

Conclusions:

• MedError provides a standardized, machine-assisted framework to enhance clinical concept extraction error analysis.
• The system facilitates the effective deployment of clinical NLP tools in real-world healthcare settings.
• Improves the evaluation and refinement of clinical NLP models.