Table 4.

Coherence analysis between HFnu and delta for normal subjects and patients with SAHS across first three NREM-REM cycles

VariablesNormal ControlModerate-to-Severe SAHSSevere SAHS
fNREM-REM (×10−4 Hz)1.82 (0.45)1.45 (0.49)1.60 (0.63)
Coherence0.91 (0.09)0.77 (0.19)*0.70 (0.24)
Gain4.74 (1.96)3.52 (2.24)2.22 (1.50)
Phase shift, °−28 (15)−30 (50)−39 (78)
Phase shift, min−7 (5)−9 (16)−12 (28)
  • Values are means (SD). fNREM-REM, NREM-REM cycle frequency.

  • * P < 0.05;

  • P < 0.01;

  • P < 0.001 vs. normal control subjects.