Ordinal Sleep Depth - Data and Code

This provides data and code to accompany the Ordinal Sleep Depth (OSD), a data-driven continuous measure of sleep depth developed using deep learning. In the manuscript, we evaluate OSD's correlation with arousal probability and its association with age, sex, sleep-disordered breathing (SDB), and cognitive impairment using 21,787 polysomnography recordings from 18,116 unique patients. OSD shows a strong linear correlation with arousal probability (Pearson's r = 0.994), slightly outperforming the Odds Ratio Product (ORP) measure (r = 0.923). Both measures reflect expected decreases in sleep depth with advancing age and demonstrate that females have significantly deeper sleep than males. OSD more accurately captures sleep depth reductions associated with SDB and increasing levels of cognitive impairment.