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. Author manuscript; available in PMC: 2012 Oct 1.
Published in final edited form as: Circ Cardiovasc Genet. 2011 Aug 16;4(5):557–564. doi: 10.1161/CIRCGENETICS.110.959197

Table 1.

Study characteristics and follow-up experience by discovery cohort

ARIC CHS FHS
Ancestry Composition Whites African Americans Whites African Americans Whites
Baseline characteristics
Participants, n 10878 2922 3952 740 3694
Sex, female, n (%) 5767 (53%) 1851 (63.4%) 2220 (56.2%) 467 (63.1%) 2094 (56.7%)
Age, years 54.3 (5.7) 53.3 (5.8) 72.7 (5.6) 73.0 (5.8) 66.8 (12.2)
Prevalent AF, n 26 0 115 0 248
Incident AF, n 737 153 919 110 215
Follow-up data
Age at AF onset, years 67.4 (6.7) 66.9 (6.4) 80.4 (6.1) 80.1 (6.8) 78.7 (10.1)

Values are mean (SD), or n (%).