Table 3.

Baseline polysomnographic data for randomized subjects and comparison by treatment group

Sleep Variables Mean±SD	Total Randomized (N= 23)	Randomized Sample		p-value
		Active CPAP n=12	Sham-CPAP n=11
Total Sleep (minutes). Time from sleep onset to good morning time.	464±64	436±58	494±59	.026
Sleep latency (minutes). Time from good night time to sleep onset	17±23	17±30	16±14	.903
% Sleep Efficiency after good night time	78.7±12.6	76.9±15.8	80.8±8.3	.475
% Sleep maintenance after Sleep onset	81.2±11.2	79.4±13.8	83.3±7.7	.419
REM latency (minutes) from sleep onset to onset of first REM period	110±67	132± 83	88±40	.129
Awake after sleep onset (minutes) – WASO	86±50	88±61	83±39	.794
Stage 1 (% total sleep time)	11.4±7.2	13.7±8.3	9.0±4.9	.117
Stage 2 (% total sleep time)	65.1±8.3	65.9±8.2	64.3±8.6	.635
Delta Sleep (% total sleep time)	3.3±4.5	2.6±4.2	4.0±4.8	.439
Stage REM (% total sleep time)	20.2±8.4	17.8±8.2	22.7±8.3	.166
Apnea + hypopnea index	38.9±26.1	50.2±30.9	26.5±11.2	.026
Apnea index	21.4±25.1	27.0±32.8	15.2±11.2	.269
Oxygen desaturation (4%) index	31.1±24.7	41.9±29.6	19.2±9.1	.023
Periodic leg movement with arousal index	1.7±2.9	1.2±2.2	2.3±3.6	.371

Good morning time = the time when a participant was woken according to their self-reported normal wake time. Good night time = time participant was requested to be according to their self-reported normal bedtime. REM = rapid eye movement; WASO= wake after sleep onset; Index = mean score per hour for total time asleep