. Author manuscript; available in PMC: 2021 May 5.

Published in final edited form as: Otolaryngol Head Neck Surg. 2020 Oct 6;164(5):1108–1115. doi: 10.1177/0194599820960454

Table 6.

Children With Down Syndrome and Poor Sleep Architecture Metrics: Those With and Without a Diagnosis of OSA.^a

Metric	OSA (n = 315)	No OSA (n = 82)	P value

Sleep
Efficiency, <80%	101 (32.4)	27 (32.9)	.92
Efficiency, <90%	228 (73.1)	69 (84.2)	.04
Latency, ≥30 min	104 (33.7)	30 (35.6)	.62
Total sleep time, <360 min	46 (14.6)	17 (21)	.16
REM latency, <90 min	112 (36)	23 (28.8)	.22
NREM
Stage 1	20 (6.4)	11 (13.8)	.03
Stage 2	81 (25.9)	21 (26.3)	.95
Stage 3	6 (1.9)	0	.61^b
REM
Sleep, <20%	103 (33.9)	33 (40.7)	.25
Sleep, <10%	6 (2)	5 (6.2)	.06^b
Cycles, <3	15 (5.1)	4 (5.4)	>.99^b
Arousal index, >10	249 (79.1)	51 (62.2)	.002

Abbreviations: NREM, non–rapid eye movement; OSA, obstructive sleep apnea; REM, rapid eye movement.

Values are presented as No. (%).

Fisher’s exact test.