Table 2 Overview of the extracted features.
Features type | Number of features (number of those with window shorter than literature) | Described in | Features computation window sizes (s) (number of epochs for template comparison) |
|---|---|---|---|
HRV features | |||
Arousal probability | 10 (5) | 35#,& | 120#, 30& |
Frequency analysis | 23 (5) | 300#, 120& | |
Adapted frequency analysis | 11 (5) | 38#,& | 300#, 120& |
Detrended fluctuation analysis | 5 | 360 | |
Progressive detrended fluctuation analysis | 1 | 60 | |
Windowed detrended fluctuation analysis | 1 | 360 | |
High frequency pole analysis | 4 (2) | 44#,& | 300#, 120& |
Multi-scale entropy | 20 | 540 | |
Local phase coordination | 7 (5) | 150#, 90& | |
Time analysis and statistics | 74 (37) | 34#,& | 300#, 30& |
Sample entropy | 2 (1) | 51#,& | 300#, 30& |
Visibility graph analysis | 13 | 210 | |
Hilbert transformation analysis | 12 (6) | 56#,& | 300#, 30& |
Respiratory activity features | |||
Amplitude analysis | 5 | 150 | |
Frequency analysis | 3 | 30 | |
Similarity respiratory patterns | 2 | 30 (60) | |
Frequency peak analysis | 3 | 30 | |
Template distance | 1 | 30 (50) | |
Time analysis | 3 | 30 | |
Visibility graph analysis | 4 | 150 | |
Variance | 1 | 30 | |
Sample entropy | 1 | 180 | |
Accelerometer features | |||
Activity counts | 1 | 30 | |
Context features | |||
Sleep stage probabilities | 4 | 30 | |
Features coverage | 1 | – | 30 |
