Table 1. Summary and baseline characteristics of included studies in meta-analysis.

Authors, year	Study	ECG screening population	Ethnicity	Region	n	Mean age		Male (%)	Brugada syndrome		Type-2 BrP
						Age	(SD)		(n)	Male (%)	(n)	Male (%)
Adler, 2013 20	Cross-sectional	Non-Febrile	White	Middle east	909	61	19	49	1	N/A	4	100
Atarashi, 2001 21	Cross-Sectional	Healthy	Asian	East Asia	10000	42	9	89.1	54	N/A	51	N/A
Bigi, 2007 22	Cross-Sectional	Palpitation group	White	Middle east	3895	38.2	11.9	46	14	78.6	86	78.6
Bozkurt, 2006 23	Cross-sectional	Healthy	White	Middle east	1238	38.9	17.6	54.2	1	100	5	100
Chung, 2014 24	Cross-Sectional	Healthy	White	North America	672	N/A	N/A	51.3	0	0	76	N/A
Donohue, 2008 25	Cross-Sectional	Hospital	White	North America	1348	52.7	16.2	53.6	0	N/A	2	N/A
Furuhashi, 2001 26	Cross-Sectional	Healthy	Asian	East Asia	8612	49.2	N/A	69.52	7	100	10	100
Gallagher, 2008 27	Cross-Sectional	Healthy	White	Europe	12012	29.88	8.99	90.8	2	100	29	100
Gervacio-Domingo, 2008 28	Cross-Sectional	Healthy	Asian	Southeast Asia	3907	N/A	N/A	N/A	7	85.7	87	85.7
Hermida, 2000 29	Cross-Sectional	Healthy	White	Europe	1000	39	10	63.2	1	100	60	100
Ito, 2006 30	Cross-Sectional	non-cardiac patient	Asian	Hawaii	8006	54.1	55	100	12	100	11	100
Juang, 2011 31	Cross-Sectional	non-cardiac patient	Asian	East Asia	20562	49	21	38.8	1	0	25	0
Juang, 2015 32	Cohort	Healthy	Asian	East Asia	5214	69.3	8	48.5	4	75	169	75
Junttila, 2004 33	Cross-Sectional	Healthy	White	Europe	3021	28.66	NA	91	0	0	18	N/A
Letsas, 2007 34	Cross-Sectional	Healthy	White	Europe	11488	56.5	NA	57.8	5	92	20	N/A
Makarawate, 2015 15	Cross-Sectional	Healthy	Asian	Southeast Asia	282	27.82	8.66	100	5	N/A	45	100
Miyasaka, 2001 35	Cross-sectional	Healthy	Asian	East Asia	13929	58	10	26.5	17	N/A	81	N/A
Monroe, 2000 36	Cross-sectional	Hospital(pre-op patient)	White	North America	12000	N/A	N/A	N/A	2	N/A	50	N/A
Ouali, 2011 37	Cross-Sectional	Athletes	White	North Africa	540	18.3	2.4	64.4	0	N/A	9	N/A
Patel, 2009 16	Cross-sectional	Hospital (tertiary)	Hispanic	North America	162590	NA	NA	NA	8	N/A	12	N/A
Pecini, 2010 38	Cross-sectional	Healthy	White	Europe	18974	52	12	45	0	N/A	13	N/A
Rattanawong, 2015 39	Cross-sectional	Non-febrile (emergency room)	Asian	Southeast Asia	249	51.2	18	N/A	2	N/A	7	100
Rattanawong, 2017 3	Cohort	Healthy	Asian	Southeast Asia	2446	40.8	7	73	10	100	21	100
Sakabe, 2003 40	Cohort	Healthy	Asian	East Asia	3339	N/A	N/A	79.25	16	N/A	53	N/A
Schukro, 2010 41	Cohort	General (military)	White	Europe	47606	18	N/A	N/A	10	77	N/A	N/A
Shin SC, 2005 42	Cross-sectional	Healthy	Asian	East Asia	225	44	13	100	0	0	3	N/A
Tsuji, 2008 43	Cross-sectional	Healthy	Asian	East Asia	13904	58	10	26.51	37	84	61	83.8
Wajed, 2008 44	Cross-sectional	Hospital	Asian	South Asia	1100	20.7	5.92	64.73	2	50	7	50

BrP, Brugada electrocardiogram pattern; ECG, electrocardiography; SD, standard deviation.