Accepted for/Published in: Journal of Medical Internet Research
Date Submitted: Sep 1, 2022
Open Peer Review Period: Sep 1, 2022 - Oct 27, 2022
Date Accepted: Nov 15, 2022
(closed for review but you can still tweet)
Warning: This is an author submission that is not peer-reviewed or edited. Preprints - unless they show as "accepted" - should not be relied on to guide clinical practice or health-related behavior and should not be reported in news media as established information.
Accuracy and Systematic Biases of Heart Rate Measurements by Consumer-Grade Fitness Trackers in Postoperative Patients: a prospective clinical trial
ABSTRACT
Background:
Over the recent years, technological advances of wrist-worn fitness trackers heralded a new era in the continuous monitoring of vital signs. So far, these devices have primarily been used for sports.
Objective:
However, for using these technologies in healthcare, further validations of the measurement accuracy in hospitalised patients are essential but lacking to date.
Methods:
We therefore conducted a prospective validation study in 201 patients after moderate to major surgery in a controlled setting to benchmark the accuracy of heart rate measurements in four consumer-grade fitness trackers (Apple Watch 7, Garmin Fenix 6 pro, Withings ScanWatch, Fitbit Sense) against the clinical gold standard (ECG).
Results:
All devices exhibited high correlation (r≥0.95; P<.001) and concordance (rc≥0.94) coefficients, with a relative error as low as MAPE<5% based on 1630 valid measurements. We identified confounders significantly biassing the measurement accuracy, although, not at clinically relevant levels (MAE<5bpm).
Conclusions:
In conclusion, consumer-grade fitness trackers appear promising in hospitalised patients for monitoring heart rate. Clinical Trial: clinicaltrials.org (accession no. NCT05418881)
Citation
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Copyright
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