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Table 2 Heart rate variation during periods with and without PLMS

From: Change in heart rate variability precedes the occurrence of periodic leg movements during sleep: an observational study

  Periods with PLMS Periods without PLMS p r
VLF power (ms) 23.1 ± 8.5 13.3 ± 4.3 < 0.01 0.88
LF power (ms) 16.4 ± 6.6 7.7 ± 2.8 < 0.01 0.88
HF power (ms) 10.2 ± 6.5 11.8 ± 8.8 n.s. -
LF/HF 2.25 1.02 < 0.01 0.88
mean frequency in VLF (Hz) 0.030 ± 0.001 0.028 ± 0.001 n.s. -
mean frequency in LF (Hz) 0.075 ± 0.004 0.075 ± 0.004 n.s. -
mean frequency in HF (Hz) 0.220 ± 0.016 0.223 ± 0.020 n.s. -
mean frequency in FHFB (Hz) 0.045 ± 0.090 0.038 ± 0.007 < 0.01 0.76
mean frequency of PLMS (Hz) 0.035 ± 0.012 - - -
  1. Values are expressed as mean±SD, except for LF/HF.
  2. PLMS, periodic leg movement during sleep; VLF, very low frequency; LF, low frequency: HF, high frequency; FHFB, fluctuation of a HF band; n.s., not significant.
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