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Table 2 Time and frequency domains parameters

From: Cardiac autonomic activity and blood pressure among Nunavik Inuit adults exposed to environmental mercury: a cross-sectional study

HRV and BP parameters Arithmetic mean (SD) Geometric Mean Range
VLF (ms2)§ 890 (2108) 690/6.5 45 – 5999
LF (ms2)§ 574 (2006) 376/5.9 16 – 6596
HF (ms2)§ 206 (726) 134/4.9 16 – 2329
LF/HF§ 3.2 (5.4) 2.8 0.4 – 13
NN (ms) 810 (364)   557 – 1167
SDNN (ms)§ 80 (84) 76 24 – 226
SDANN (ms)§ 51 (67) 47 12 – 189
RMSSD (ms)§ 30 (37) 28 12 – 93
PNN50 (%) § 10 (31) 5 0 – 57
SBP (mm Hg) 123 (37)   85 – 187
DBP (mm Hg) 75 (21)   55 – 111
PP (mm Hg) 48 (27)   23 – 94
  1. § Variables not normally distributed; for VLF, LF and HF, the Ln mean is also shown; SBP: systolic blood pressure, DBP: diastolic blood pressure, PP: pulse pressure.