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

Published in final edited form as: Heart Rhythm. 2013 Nov 14;11(3):452–457. doi: 10.1016/j.hrthm.2013.11.012

Table 1. Clinical characteristics of the study samples by cohort.

	No. of individuals			Clinical characteristic

Cohort	Total	With AF	Without AF	Age (y)^*	Women	Hypertension
ARIC Study	1952	245	–	57.4 ± 5.6	87 (35.5%)	116 (47.3%)
		–	1707	54.4 ± 5.6	868 (50.8%)	488 (28.5%)
CHS	1132	351	–	73.0 ± 5.8	185 (52.7%)	221 (63.0%)
		–	781	72.3 ± 5.3	422 (54.0%)	412 (52.8%)
FHS	994	152	–	69.1 ± 9.4	63 (41.4%)	63 (41.4%)
		–	842	60.8 ± 10.2	449 (53.3%)	228 (27.1%)
MGH	200	200	–	52.9 ± 11.1	37 (18.5%)	50 (25.0%)

Values are presented as mean ± SD and as n (%).

AF = atrial fibrillation; ARIC = Atherosclerosis Risk in Communities; CHS = Cardiovascular Health Study; FHS = Framingham Heart Study; MGH = Massachusetts General Hospital.

Age in the FHS was assessed at the time when DNA was drawn.