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. 2021 Dec 16;21(24):8421. doi: 10.3390/s21248421

Table 6.

Ordered features from the lowest |ρ| to the highest |ρ| for features (1 to 17) extracted from red PPG signals, in each of the runs of the experiment (R#) and under each blood pressure condition. Features coloured blue indicate temporal features, features coloured yellow indicate amplitude features, and those in green are geometric features reported in radians.

Hypotension Normotension Stage 1 Hypertension Stage 2 Hypertension
R1 R2 R3 R1 R2 R3 R1 R2 R3 R1 R2 R3
1 14 13 1 1 1 1 1 1 1 1 1
15 1 1 12 9 7 13 7 12 9 15 15
9 9 11 13 11 13 7 16 15 13 13 13
14 15 12 11 13 11 11 15 14 11 14 11
12 16 16 14 14 15 12 3 16 14 9 14
8 3 3 16 16 9 14 12 9 7 11 9
13 17 17 7 12 14 15 17 3 12 7 12
11 12 9 9 3 12 9 8 17 16 16 16
16 8 15 3 17 8 16 9 8 3 17 8
3 13 14 17 8 16 8 10 10 17 3 7
17 7 8 15 15 3 3 2 2 15 12 3
2 11 2 8 2 17 17 14 5 8 8 17
10 2 10 10 10 2 10 5 4 10 6 10
5 10 5 2 5 10 2 4 6 2 2 2
4 5 7 5 7 6 5 6 7 5 4 5
6 4 4 4 4 5 4 13 11 4 5 6
7 6 6 6 6 4 6 11 13 6 10 4