. Author manuscript; available in PMC: 2015 Nov 1.

Published in final edited form as: J Cardiovasc Electrophysiol. 2014 Aug 25;25(11):1150–1157. doi: 10.1111/jce.12483

Table 1.

Baseline characteristics of African Americans by cohort

	ARIC	CFS	CHS	JHS	MESA
Total Number	2874	632	822	2232	1754
Age in yrs (SD)	53 (6)	37 (19)	73 (6)	50 (12)	62 (10)
Male (%)	37	43	37	39	45
MAF of rs7629265	0.074	0.064	0.076	0.076	0.070
PR in msec (SD)	171.8 (28)	169.0 (26)	170.5 (30)	170.6 (26)	170.8 (26)
QRS in msec (SD)	90.0 (10)	89.4 (10)	87.5 (11)	91.9 (10)	91 (10)
QT in msec (SD)	400.2 (31)	397.5 (30)	408.4 (35)	413.0 (31)	410.3 (32)

Abbreviations: yrs = years; SD = standard deviation; MAF = minor allele frequency; SCD: sudden cardiac death; msec: milliseconds; SD: standard deviation.