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Performance of seven consumer sleep-tracking devices compared with polysomnography
Chinoy ED, Cuellar JA, Huwa KE, et al. · Sleep 44(5):zsaa291 · 2021
Key finding
Consumer devices estimated total sleep well but were poor at sleep stages — trust duration, not deep/REM.
Citation
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Get SleepShred for iPhoneEducational summary of published research, not medical advice. Screening scores are not diagnoses. If a score is elevated or you feel unwell, talk to a clinician.