Table 2.

Sleep apnea and sleep in subjects who had atrial fibrillation at baseline and sinus rhythm at follow-up.

	Baseline: atrial fibrillation (n = 16)	Follow-up: sinus rhythm (n = 16)	P value
Sleep apnea (AHI ≥5 events/h), n (%)	13 (81)	14 (88)	1.0
Obstructive sleep apnea, n (%)	11 (69)	13 (81)	0.5
Central sleep apnea, n (%)	2 (12)	3 (19)	1.0
Apnea-hypopnea index (AHI), events/h	23 ± 16	21 ± 14	0.918
Obstructive AHI, events/h	18 ± 15	18 ± 14	0.569
Central AHI, events/h	4.8 ± 12	3.4 ± 6.9	0.593
Total sleep time (TST) (min)	382 ± 67	378 ± 100	0.857
Sleep efficiency (%)	77 ± 15	79 ± 24	0.644
Stage 1 (% of TST)	14 ± 6.7	15 ± 8.7	0.339
Stage 2 (% of TST)	55 ± 12	55 ± 10	0.988
Stage 3 (% of TST)	11 ± 7.5	12 ± 7.7	0.640
REM (% of TST)	19 ± 7.9	18 ± 7.1	0.293
Supine position (% of TST)	27 ± 24	33 ± 19	0.397
Epworth Sleepiness Scale	7.7 ± 5.2	6.7 ± 5.0	0.216

Data are presented as means ± standard deviation for continuous variables, or numbers and percentages for dichotomous variables.

AHI: apnea-hypopnea index; central sleep apnea: central apnea-hypopnea index ≥5 events/h; obstructive sleep apnea: obstructive apnea-hypopnea index ≥5 events/h; TST: total sleep time.