Figure 1.
Bland–Altman plots of sleep variables of the test set of healthy volunteers, for the real-time models that score the present epoch by considering it and five past epochs. p-values from Student's t-test on the hypothesis of the bias being zero. A single significant trend (pslope < 0.01) was detected and included with its corresponding R squared value. This trend is driven by a single outlying data point. n = 12, mean age ± SD: 23.0 ± 3.1 years, 5 male, 4 nights of PSG + actigraphy + two radars per participant. The participants were randomly assigned into a training set for model development (n = 24/22 for nightstand/ceiling), and a testing set for validation (n = 23/21 for nightstand/ceiling). PSG, polysomnography; SOL, sleep onset latency; TST, total sleep time; WASO, wake after sleep onset; SE, sleep efficiency.