Table 6.
Sleep parameters estimated with a real-time model over all nights in the test set of healthy volunteers*
| Mean (SD‡) | |||
|---|---|---|---|
| Sleep parameter† [units] | Actigraphy (n = 63) | Nightstand (n = 63) | Ceiling (n = 58) |
| TST [min] | 431.8 (31.5) | 434.2 (26.4) | 432.1 (40.2) |
| SO after 23:00 h [min] | 18.2 (14.9) | 21.0 (18.7) | 17.7 (17.8) |
| WASO [min] | 37.5 (37.3) | 20.6 (24.4) | 27.0 (34.6) |
| SE [%] | 88.7 (6.8) | 91.3 (5.5) | 90.7 (8.5) |
| NW [num] | 20.5 (9.0) | 14.4 (7.6) | 11.9 (7.1) |
Sleep parameters extracted from the sleep/wake state sequences resulting from the application of a real-time classification model that includes information from five past and zero future epochs, for all nights in the DS1-test (including the ones without consecutive PSG§ recordings). Since no user marker was available for the nights without PSG, sleep onset latency was calculated from the set bedtime at 23:00 h.
*n = 12, mean age ± SD: 23.0 ± 3.1 years, 5 male, 11 nights of actigraphy + two radars per participant. The participants were randomly assigned into a training set for model development (n = 63/59 for nightstand/ceiling), and a testing set for validation (n = 63/58 for nightstand/ceiling).
†TST, Total Sleep Time; SOL, Sleep Onset Latency; WASO, Wake After Sleep Onset; SE, Sleep Efficiency; NW, Number of awakenings.
‡SD, standard deviation.
§PSG, Polysomnography.