Association between Sleep Apnea Hypopnea Syndrome and the Risk of Atrial Fibrillation: A Meta-Analysis of Cohort Study

Table 1

Characteristics of studies included in the meta-analysis.

Author	Year	Country	SAHS		Non-SAHS		Research type	Age (year)	Follow-up (year)	SAHS diagnosis	Study quality
			Events	Total	Events	Total					NOS score
Gami et al.	2007	USA	114	2626	19	916	Retrospective cohort study	49.0 ± 14.0	Mean 4.7 years	Polysomnography	8
Khawaja et al.	2013	USA	81	764	1386	17991	Prospective cohort studies	67.7 ± 8.6	Mean 6.9 ± 2.1 years	Questionnaire	7
Chao et al.	2014	China	53	4082	3970	575439	Longitudinal cohort study	38.9 ± 13.1	Mean 9.2 ± 2.0 years	Polysomnography	8
Kwon et al.	2015	USA	72	1341	28	707	Multisite cohort study	68.4 ± 9.2	2 years and 4 months	Polysomnography	7
Cadby et al.	2015	Australia	374	4352	81	2489	Consecutive cohort study	48.3 ± 12.5	Median 11.9 years	Polysomnography	8
Lin et al.	2015	USA	16	165	196	4018	Prospectively longitudinal cohort study	61.3 ± 9.6	Mean 8.5 years	Questionnaire	6
May et al.	2016	USA	4	29	53	500	Prospective cohort studies	75.0 ± 5.0	Mean 6.5 ± 0.7 years	Polysomnography	7
Tung et al.	2017	USA	196	1440	142	1472	Prospective cohort studies	62.8 ± 11.2	Average 5.3 years	Polysomnography	7

SAHS: sleep apnea hypopnea syndrome; NOS: Newcastle-Ottawa Scale.