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Table 2 Sleep Measures

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)
(Trial 1)
NREM sleep
(with CPAP)
(Trial 2)
Apnea index (apnea/hr) 0.38 ± 0.15 0.67 ± 0.34 1.19 ± 0.56 0.16 ± 0.07
Hypopnea index (hypopnea/hr) 1.80 ± 0.71 0.89 ± 0.29 2.14 ± 0.62 0.34 ± 0.19
Arousal index (arousals/hr) 12.87 ± 1.39 12.87 ± 1.02 14.11 ± 2.20 10.74 ± 1.83
Nocturnal Oxygen Saturation (%) 96.58 ± 0.23 96.7 ± 0.30 96.10 ± 0.39 96.40 ± 0.42
Sleep efficiency (%) 88.76 ± 3.62 88.09 ± 2.02 86.32 ± 2.18 83.73 ± 1.99
% of time in Stage I 11.29 ± 1.83 7.83 ± 0.90 7.22 ± 1.04 8.88 ± 1.57
% of time in Stage II 46.04 ± 1.42 45.53 ± 1.91 48.07 ± 2.58 48.48 ± 2.57
% of time in Slow Wave Sleep 22.45 ± 3.10 20.65 ± 1.42 21.95 ± 1.41 21.27 ± 2.36