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Table 6 Intervals and p values for the Values of each feature under stressful and non-stressful (reference) conditions—where values lower than the reference interval indicate stress

From: Medically-oriented design for explainable AI for stress prediction from physiological measurements

Feature

Stress interval

Reference interval

p Value

\({Max}_{{ChestEDA}}\)

11.27 ± 7.99

3.79 ± 3.03

1.E–110

\(\sigma _{{ChestSCL}}\)

1.65 ± 1.5

5.45 ± 4.82

8E–161

\(HF_{{HRV}}\)

2E+11 ± 2E+11

2E+12 ± 1E+12

5E–227

\(LF_{{HRV}}\)

3E+11 ± 3E+11

2E+12 ± 2E+12

4E–226

\({Mad}_{{NN}}\)

21.43 ± 15.72

74.11 ± 42.68

1E–204

\({MCV}_{{NN}}\)

0.03 ± 0.02

0.09 ± 0.05

4E–196

\(|\mu |_{{NN}}\)

701.81 ± 82.84

954.91 ± 170.8

1E–219

\({Med}_{{NN}}\)

693.93 ± 80.36

959.64 ± 191.07

5E–214

\({PNN}_{20}\)

33.61 ± 28.55

75.35 ± 14.49

1E–220

\({PNN}_{50}\)

15.15 ± 15.15

38.6 ± 33.12

1E–167

\({RMSSD}_{{NN}}\)

28.54 ± 18.23

94.8 ± 46.63

2E–230

\(\sigma _{{NN}}\)

39.89 ± 25.97

107.69 ± 51.22

2E–218

\({Min}_{{EMG}}\)

− 9E–02 ± 7E–02

− 2E–02 ± 1.E–02

7E–146

#\({\ Peaks}_{{EMG}}\)

6416.5 ± 866

6955 ± 721

1E–49

\({Max}_{{RespRate}}\)

13.11 ± 3.36

18.34 ± 2.08

1E–229

\(\mu _{{RespRate}}\)

11.68 ± 2.69

16.91 ± 2.4

4E–231

\({Mi}n_{{RespRate}}\)

9.82 ± 2.33

15.32 ± 2.96

7E–232

\({Max}_{{WristTemp}},\)

31.79 ± 2.12

34.99 ± 0.92

2E–175

\(\mu _{{WristTemp}}\)

31.69 ± 2.1

34.93 ± 0.93

1E–178

\({Min}_{{WristTemp}}\)

31.66 ± 2.15

34.91 ± 0.92

5E–173