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Table 3 Autonomic measures obtained from controls and non-apneic snorers during wakefulness and non-rapid eye movement sleep

From: Heart rate variability in non-apneic snorers and controls before and after continuous positive airway pressure

  Control (n = 12) Snorer (n = 11)
  NREM sleep
(without CPAP)
(Trial 1)
NREM sleep
(with CPAP)
(Trial 2)
NREM sleep
(without CPAP)
(snoring)
(Trial 1)
NREM sleep
(without CPAP)
(non-snoring)
(Trial 1)
NREM sleep
(with CPAP)
(Trial 2)
Heart rate (beats/min) 55.25 ± 1.53 54.58 ± 1.90 57.27 ± 1.45 55.18 ± 1.77 56.27 ± 1.74
Breathing Frequency (breaths/min) 14.89 ± 0.53 14.35 ± 0.46 13.85 ± 0.69 13.91 ± 0.53 14.23 ± 0.62
ln LF 7.24 ± 0.16 7.11 ± 0.13 7.68 ± 0.16 7.99 ± 0.27 7.41 ± 0.19
ln HF 7.99 ± 0.21 7.72 ± 0.19 8.19 ± 0.13 7.83 ± 0.18§ 7.40 ± 0.21§
LF/HF 0.57 ± 0.12 0.70 ± 0.14 0.69 ± 0.08 1.43 ± 0.29§ 1.20 ± 0.18*
HF (nu) 67.51 ± 3.60 64.44 ± 3.95 62.46 ± 2.60 46.71 ± 5.38§ 50.32 ± 4.18*
LF (nu) 34.27 ± 4.37 39.24 ± 5.01 36.61 ± 2.58 52.0 ± 5.26§ 48.79 ± 4.09*
  1. * – significantly different from snorer – without CPAP – snoring; control – with CPAP
  2. § – significantly different from snorer – without CPAP – snoring