Explainable artificial intelligence for LDL cholesterol prediction and classification

Sevilay Sezer1, Ali Oter2, Betul Ersoz3

  • 1Department of Medical Biochemistry, Ministry of Health, Ankara Bilkent City Hospital, Ankara, Turkey.

PubMed

Insights

Artificial Intelligence (AI) accurately predicts low-density lipoprotein cholesterol (LDL-C) levels, outperforming traditional formulas. Explainable AI (XAI) ensures these predictions are interpretable, enhancing clinical decision-making for atherosclerotic heart disease risk.

Area of Science:

  • Cardiovascular Medicine
  • Biomedical Informatics
  • Artificial Intelligence in Healthcare

Background:

  • Low-density lipoprotein cholesterol (LDL-C) monitoring is crucial for managing atherosclerotic heart disease risk.
  • Accurate LDL-C measurement or estimation is vital in clinical practice.
  • Existing methods for LDL-C calculation may have limitations in precision.

Purpose of the Study:

  • To evaluate Artificial Intelligence (AI) and Explainable AI (XAI) for predicting LDL-C levels.
  • To compare AI-driven LDL-C predictions with traditional calculated values.
  • To emphasize the interpretability of AI models in LDL-C estimation.

Main Methods:

  • Retrospective analysis of 60,217 patient lipid profiles from a hospital Laboratory Information System.
  • Application of AI models including Gradient Boosting (GB), Random Forests (RF), Support Vector Machines (SVM), and Decision Trees (DT).
  • Utilized XAI techniques (SHAP, LIME) to interpret AI model predictions and compared with direct LDL-C measurements and formula-based calculations.

Main Results:

  • AI models, particularly RF and GB, demonstrated a stronger correlation with directly measured LDL-C than formula-based calculations.
  • Total Cholesterol (TC) was identified as the most significant predictor of LDL-C using SHAP and LIME.
  • AI-based LDL-C classification showed higher agreement with NCEP ATPIII guidelines compared to formula-based methods.

Conclusions:

  • AI offers a reliable and explainable approach for estimating and classifying LDL-C levels.
  • AI-driven predictions enhance the accuracy of LDL-C assessment in clinical settings.
  • The interpretability of AI models (XAI) is key to their clinical adoption for cardiovascular risk management.
Abstract

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