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February 8, 2026Frontiers in Digital Health0 citationsOpen Access

Predicting atrial fibrillation and flutter using BEHRT and identifying multimorbidity patterns using BERTopic

SBSangeun BaeYKYeonjae KimSPSamina Park

Key Result

BEHRT predicted atrial fibrillation and flutter with an AUROC of 0.80, outperforming LSTM (AUROC 0.73) in adults aged ≥19 in Korea using 5-year disease histories.

Key Points

  • The research aims to predict atrial fibrillation and flutter and identify comorbidity patterns using advanced modeling techniques.
  • Conducted a population-based nested case-control study using data from the Korean National Health Insurance Corporation.
  • Included adults aged 19 years and older with at least three years of health claims data.
  • Utilized BEHRT to predict atrial fibrillation and flutter and BERTopic to identify multimorbidity patterns.
  • Applied stratified random sampling for control matching with a ratio of 1:4.
  • BEHRT achieved an area under the receiver operating characteristic curve (AUC) of 0.80 for predicting the conditions.
  • Identified sex-specific multimorbidity patterns: aortic aneurysm and chronic obstructive pulmonary disease were common in males.
  • Alzheimer's disease and rheumatic heart disease were prominent in females.

Study Design

Type

Case-Control (n=600,030)

Multicenter

Yes

Structured PICO

Does the BEHRT model accurately predict atrial fibrillation and flutter based on 5-year multimorbid histories in adults?

P
Population
600,030 adults aged ≥19 years with at least three years of recorded claims from the Korean National Health Insurance Corporation (2002–2019), including 8,661 cases of newly diagnosed atrial fibrillation and flutter and 591,369 matched controls.
I
Intervention
BEHRT (bidirectional encoder representation from transformers for electronic health records) model and BERTopic analysis using 5-year disease histories
C
Comparator
LSTM (Long Short-Term Memory) model for prediction comparison, and non-AFF controls for multimorbidity patterns
O
Outcome
Prediction of atrial fibrillation and flutter incidence (evaluated by AUROC)

Transformer-based deep learning models (BEHRT) can effectively predict incident atrial fibrillation and flutter using 5-year longitudinal claims data, while BERTopic identifies distinct sex-specific multimorbidity patterns preceding diagnosis.

Main Result

Effect estimate: AUROC 0.80 vs 0.73

Absolute Event Rate: 0.8% vs 0.73%

Limitations

  • Use of administrative insurance claims data may introduce misclassification bias.
  • Observed associations do not establish causality.
  • The BEHRT model showed moderate precision and recall (F1 score 0.40, area under precision-recall curve 0.57), indicating potential for further tuning.
  • Data did not distinguish between valvular and non-valvular atrial fibrillation/flutter subtypes.
  • Study population limited to Korean adults which may affect generalizability.

Abstract

Introduction Atrial fibrillation and flutter are heart rhythm disorders frequently associated with multiple other chronic conditions, complicating their management and requiring optimized care. Analyzing pre-atrial fibrillation and flutter comorbidity patterns could enable proactive, preventive, and personalized healthcare. Methods This population-based nested case-control study analyzed data from the Korean National Health Insurance Corporation (2002–2019). Adults aged ≥19 years with at least three years of recorded claims were included. Cases were individuals newly diagnosed with atrial fibrillation and flutter between 2007 and 2019 following a washout period (2002–2006). Controls were matched 1:4 using stratified random sampling. Using 5-year disease histories, BEHRT, a transformer-based model, predicted atrial fibrillation and flutter, while BERTopic identified sex-specific multimorbidity patterns. Predictive performance was evaluated using the area under the receiver operating characteristic curve (AUC). Results BEHRT achieved an AUC of 0.80 for predicting atrial fibrillation and flutter among 600,030 participants (8,661 cases and 591,369 controls). BERTopic analysis revealed sex-specific multimorbidity patterns: aortic aneurysm, hypertensive heart disease, and chronic obstructive pulmonary disease were common in males, while Alzheimer's disease, Parkinson's disease, and rheumatic heart disease were prominent in females. Discussion The combination of BEHRT and BERTopic demonstrated the ability to predict atrial fibrillation and flutter based on multimorbid histories while identifying distinct sex-specific disease patterns. These findings underscore the potential for artificial intelligence to enhance personalized healthcare and optimize prevention and management strategies for chronic conditions.

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Cite This Study

Bae et al. (2026) conducted a case-control in Adults aged ≥ 19 years from Korean population with/without newly diagnosed atrial fibrillation and flutter (n=600,030). BEHRT prediction model vs. Long Short-Term Memory (LSTM) model was evaluated on Prediction accuracy for incidence of atrial fibrillation and flutter using 5-year disease history (AUROC 0.80 vs 0.73). BEHRT predicted atrial fibrillation and flutter with an AUROC of 0.80, outperforming LSTM (AUROC 0.73) in adults aged ≥19 in Korea using 5-year disease histories.

synapsesocial.com/papers/698827b40fc35cd7a88469afhttps://doi.org/10.3389/fdgth.2026.1722338
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