Category: Clinical Stones: Medical Management

MP10-17 - Protocol to Develop a Digital Biomarker to Detect Drinking Behavior using Wrist-Worn Inertial Sensors

Fri, Sep 21
2:00 PM - 4:00 PM

Introduction & Objective :

Compliance with increasing fluid intake to produce at least 2.5L of urine daily for kidney stone prevention is commonly below 50%. We have previously shown that patients are interested in utilizing sensors to provide automated lapse detection in fluid intake to improve adherence to recommendations. Wrist-worn inertial sensors can detect drinking behavior with accelerometers and gyroscopes. The purpose of this study was to devise a protocol to test the ability of a wrist sensor to refine the detection of drinking behavior in everyday activities and to evaluate the recruitment process for future clinical trials.


Methods : Adults without physical limitations were recruited to participate in the 70-minute lab sessions. Wrist sensors were worn bilaterally and participants were videotaped performing a variety of daily activities, including drinking from various vessels.


Results : 30 participants were enrolled out of a total of 56 who were eligible, with an average age of 33 (range 19-68), 80% Caucasian and 87% female. Participants completed the lab study in 18 sessions over 7 weeks. Table 1 highlights the amount of time spent performing protocol activities.


Conclusions : Sensor data can be collected in the laboratory to classify drinking gestures. The digital biomarker being developed in this protocol can be applied to automate lapse detection as a part of a fluid intake intervention for patients with kidney stones. Combining this digital biomarker with evidence-based behavior change techniques may improve adherence to fluid intake recommendations.

Necole M. Streeper

Assistant Professor of Surgery
Penn State Milton S. Hershey Medical Center
Hershey, Pennsylvania

Edison Thomaz


Austin, Texas

Ashley Sanders


University Park, Pennsylvania

Alexandra Dubnansky


University Park, Pennsylvania

David Conroy


University Park, Pennsylvania