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Volume 15 No. 03
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Accepted Papers

Emerging Technologies

Sleep Parameter Assessment Accuracy of a Consumer Home Sleep Monitoring Ballistocardiograph Beddit Sleep Tracker: A Validation Study

Jarno Tuominen, MA1; Karoliina Peltola, MA1; Tarja Saaresranta, MD, PhD2,3; Katja Valli, PhD1,4
1Department of Psychology and Speech-Language Pathology, University of Turku, Finland; 2Division of Medicine, Department of Pulmonary Diseases, Turku University Hospital, Turku, Finland; 3Sleep Research Centre, Department of Pulmonary Diseases and Clinical Allergology, University of Turku, Finland; 4Department of Cognitive Neuroscience and Philosophy, School of Bioscience, University of Skövde, Sweden

Study Objectives:

Growing interest in monitoring sleep and well-being has created a market for consumer home sleep monitoring devices. Additionally, sleep disorder diagnostics, and sleep and dream research would benefit from reliable and valid home sleep monitoring devices. Yet, majority of currently available home sleep monitoring devices lack validation. In this study, the sleep parameter assessment accuracy of Beddit Sleep Tracker (BST), an unobtrusive and non-wearable sleep monitoring device based on ballistocardiography, was evaluated by comparing it with polysomnography (PSG) measures. We measured total sleep time (TST), sleep onset latency (SOL), wake after sleep onset (WASO), and sleep efficiency (SE). Additionally, we examined whether BST can differentiate sleep stages.


We performed sleep studies simultaneously with PSG and BST in ten healthy young adults (5 female/5 male) during two non-consecutive nights in a sleep laboratory.


BST was able to distinguish SOL with some accuracy. However, it underestimated WASO and thus overestimated TST and SE. Also, it failed to discriminate between non-rapid eye movement sleep stages and did not detect the rapid eye movement sleep stage.


These findings indicate that BST is not a valid device to monitor sleep. Consumers should be careful in interpreting the conclusions on sleep quality and efficiency provided by the device.


Tuominen J, Peltola K, Saaresranta T, Valli K. Sleep parameter assessment accuracy of a consumer home sleep monitoring ballistocardiograph beddit sleep tracker: a validation study. J Clin Sleep Med. 2019;15(3):483–487.

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