A team at Korea University integrates Fitbit-derived activity and heart-rate metrics with nightly app entries using cosinor-based circadian features to train random forest and XGBoost classifiers, distinguishing moderate and severe RLS symptom groups with AUCs up to 0.86.
Key points
- Integration of 85 circadian-based features from Fitbit Inspire wearables and the SOMDAY smartphone app
- Random Forest model achieved AUC 0.86 for moderate RLS prediction; XGBoost reached AUC 0.70 for severe RLS prediction
- SHAP analysis highlighted M10 step counts, relative amplitude, and stress level as primary predictive features
Why it matters: Objective digital phenotyping and ML screening could revolutionize early detection and personalized management of RLS, reducing diagnostic delays due to subjective reporting.
Q&A
- What is digital phenotyping?
- How do circadian features improve prediction?
- What role does SHAP analysis play?