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. 2020 Aug 31;9:217. doi: 10.4103/jehp.jehp_627_19

Table 4.

Comparison of frequency domain analysis in control and cases

Parameters Group P Significance

Control Case


Mean SD Mean SD
VLF (peak) (Hz) 0.02 0.00 0.02 0.00 0.3 NS
LF (peak) (Hz) 0.09 0.07 0.09 0.12 0.4 NS
HF (peak) (Hz) 0.2 0.21 0.17 0.03 0.45 NS
VLF (power) (ms2) 5.5 8.22 9.86 9.68 0.008 HS
LF (power) (ms2) 9.64 14.22 15.64 17.28 0.03 S
HF (power) (ms2) 4.26 5.84 6.02 9.49 0.13 NS
VLF (power) (%) 24.10 17.56 27.92 14.49 0.11 NS
LF (power) (%) 50.46 15.93 53.23 13.75 0.17 NS
HF (power) (%) 25.45 14.32 19.07 11.77 0.8 NS
LF/HF (power %) (LF/HF ratio) 2.54 1.41 3.36 1.54 0.003 HS
LF (power) (nu) 66.71 14.47 74.70 11.95 0.1 NS
HF (power) (nu) 33.27 14.47 27.31 17.58 0.3 NS

NS: P>0.05, S: P<0.05, HS: P<0.01. LF=Low frequency, HF=High frequency, NS=Not significant, HS=Highly significant, SD=Standard deviation, S=Significant, VLF=Very low frequency