Effects of Continuous Positive Airway Pressure on Sleep EEG Characteristics in Patients with Primary Central Sleep Apnea Syndrome

Table 2

The proportion of sleep in different stages of patients with CSAS before and after continuous positive airway pressure (CPAP) treatment.

	REM%	N1%	N2%	N3%
Before CPAP	8.40 ± 5.32	26.66 ± 16.62	55.13 ± 10.42	9.81 ± 10.62
After CPAP	23.60 ± 9.76	7.38 ± 5.56	49.93 ± 14.40	19.13 ± 15.17

vs. before CPAP. CSAS, central sleep apnea syndrome; CPAP, continuous positive airway pressure; REM, rapid eye movement.