Table 2.

Sleep characteristics obtained by 1-night polysomnography.

	Entire Cohort (n = 74)	PRS (n = 31)	AWO (n = 43)	P
TST whole PSG, min	381 [269–456]	293 [216–423]	414 [356–481]	<.001
TST (supine support free, min	133.5 [99.5–186.5]	105 [82.5–128.5]	168 [114–215.5]	.001
Sleep efficacy, %	77 [67.1–88.1]	76 [60.4–81.9]	81.3 [69.2–89.7]	.162
Sleep efficiency, %	73.8 [62.3–84.6]	69.9 [56.8–78.2]	80.2 [66–87.8]	.033
Awakening and arousal index, events/h	31.3 [24.5–43]	37.4 [27.1–48.1]	27.9 [23.7–40.4]	.042
Arousal, events/h	29.4 [20.1–35.2]	30.3 [20.4–37.7]	22.9 [20–30.3]	.178
Respiratory arousal index, events/h	6.8 [3–16.3]	9 [3.7–16.6]	4.9 [2.6–10.8]	.189
Proportion of sleep stages, %TST
REM sleep	40.5% [30.1–49.1%]	45.1% [30.4–53.9%]	36.3% [48.4–90.5%]	.237
NREM sleep	59.5% [47.3–68.8%]	55% [41.2–69.3%]	63% [51.9–68.3%]	.209

Data were not available for 4 patients (see Methods). Data are expressed as median and interquartile range. P values < .001 were considered statistically significant. AWO = isolated airway obstruction, NREM = non–rapid eye movement, PRS = Pierre Robin sequence, PSG = polysomnography, REM = rapid eye movement, TST = total sleep time.