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. 2016 Apr 15;16(4):542. doi: 10.3390/s16040542

Table 2.

Electrocardiogram signal quality—dry condition.

Parameter Ag/AgCl PLS p-Value Ag/AgCl PLP p-Value
Temporal measures of HRV meanNN (ms) 700.5 ± 89.6 700.1 ± 91.1 0.9816 723.4 ± 86.2 723.0 ± 83.8 0.9853
SDNN (ms) 59.2 ± 22.5 55.8 ± 27.3 0.7819 54.2 ± 16.0 48.8 ± 16.3 0.4171
RMSSD (ms) 58.7 ± 39.8 51.3 ± 42.4 0.7075 50.4 ± 27.9 38.3 ± 27.8 0.2986
NN50 23.22 ± 19.44 21.77 ± 19.33 0.8764 28.83 ± 21.88 27.75 ± 23.31 0.9076
Spectral measures of HRV LF (ms2) 1258 ± 783 1066 ± 757 0.6042 992 ± 760 895 ± 632 0.7371
HF (ms2) 1391 ± 2003 701 ± 1287 0.3976 757 ± 812 498 ± 623 0.3914
Total (ms2) 431562 ± 81172 429086 ± 79566 0.9487 450714 ± 101211 449358 ± 100911 0.9740
LF/HF 3.66 ± 2.69 4.29 ± 2.54 0.6182 2.25 ± 1.71 3.61 ± 2.84 0.1685
Corr-Coef r (unitless) - 0.99 ± 0.005 - - 0.99 ± 0.001 -