Parameter | Repeatability-4* | Repeatability-5† | ||
---|---|---|---|---|
of 56 cases | % | of 56 cases | % | |
Root mean square (RMS) | 46 | 82.14 | 40 | 71.43 |
Mean absolute value (MAV) | 44 | 78.57 | 40 | 71.43 |
Maximum amplitude (MAX) | 39 | 69.64 | 29 | 51.79 |
Slope sign changes (SSC) | 31 | 55.36 | 21 | 37.50 |
Zero crossings (ZC) | 29 | 51.79 | 18 | 32.14 |
Waveform length (WL) | 45 | 80.36 | 38 | 67.86 |
Mean Frequency (MNF) | 42 | 75.00 | 24 | 42.86 |
Median Frequency (MDF) | 42 | 75.00 | 21 | 37.5 |
Signal-to-motion artifact ratio (SMR) | 4 | 7.14 | 1 | 1.79 |
Maximum-to-minimum drop in power density ratio (DPR) | 26 | 46.43 | 17 | 30.36 |
Signal-to-noise ratio (SNR) | 36 | 64.29 | 21 | 37.50 |
Power spectrum deformation (Ω) | 30 | 53.57 | 20 | 35.71 |