Control-Relevant Adaptive Personalized Modeling From Limited Clinical Data for Precise Warfarin Management

Area of Science:

• Pharmacometrics
• Biomedical Engineering
• Systems Biology

Background:

• Warfarin dosing is complex due to narrow therapeutic index (International Normalized Ratio - INR), patient variability, and drug interactions.
• Accurate warfarin dosage prediction is crucial for patient safety and treatment efficacy.

Purpose of the Study:

• To develop an adaptive, individualized modeling framework for predicting optimal warfarin dosage.
• To address challenges in warfarin administration including patient variability and limited clinical data.

Main Methods:

• Utilized model (In)validation and semi-blind robust system identification for adaptive individualized patient modeling.
• Collected clinical warfarin-INR data from 44 patients for framework implementation and validation.
• Compared the proposed algorithm against recursive ARX and ARMAX model identification methods.

Main Results:

• The adaptive framework accurately predicted warfarin dosage, maintaining desired International Normalized Ratio (INR) levels.
• The model successfully adapted to individual patient status changes throughout treatment.
• Demonstrated superior performance in one-step-ahead prediction and minimum mean squared error (MMSE) analysis compared to existing methods.

Conclusions:

• An adaptive personalized patient modeling framework was proposed for warfarin management using limited clinical data.
• The framework accurately predicts patient dose-response characteristics and adapts models to current patient status.
• The system can alert clinicians when models require adaptation, reducing prediction errors and improving patient care.