arXiv
Heart recordings offer continuous sleep depth scores in people
Correlations with ranked sleep stages, excluding rapid eye movement sleep, were 0.828 in internal testing and 0.848 in external testing.Correlations with ranked sleep stages, excluding rapid eye movement sleep, were 0.828 in internal testing and 0.848 in external testing.
Preprint: cohort studyBiomarkers
Who was studiedPeople undergoing overnight polysomnography, overnight
What changedHeart-recording sleep-depth scores were higher during deeper conventional sleep stages in the independent validation cohort
The catchReported sleep-depth profiles required reference sleep-stage labels for normalization, not ECG alone