Table 2.

Sleep architecture and AHI

Variable	Mean	SD	95% CI	Median	IQR
Sleep onset (min)				10.00	15.25 (2.50–17.75)
Total sleep time (min)				334.0	83.75 (276.25–360.00)
Sleep efficiency (%)				84.00	21.00 (70.00–91.00)
Arousal index				15.50	41.65 (8.75–50.40)
Stage N1 sleep (% of TST)				19.50	19.00 (13.40–32.40)
Stage N2 sleep (% of TST)	53.93	13.39	48.40–59.46
Stage N3 sleep (% of TST)				3.90	19.50 (0.00–19.50)
REM sleep (% of TST)	8.92	6.21	6.35–11.48
AHI				19.40	65.60 (10.60–76.20)

AHI=apnea-hypopnea index; IQR=interquartile range; TST=total sleep time.