. Author manuscript; available in PMC: 2013 Jan 3.

Published in final edited form as: J Am Coll Cardiol. 2008 Feb 26;51(8):810–815. doi: 10.1016/j.jacc.2007.09.065

Table 3.

Proportion of ATRIA Cohort Categorized by 5 Risk Stratification Schemes Used to Predict Atrial Fibrillation–Related Thromboembolism and Discriminatory Ability of Risk Schemes (c-Statistics)

	Risk for Thromboembolism (%)			c-Statistic
	Low	Intermediate	High	All Patients	Subgroup^*
AFI	13.1	24.7	62.3	0.56	0.61
SPAF	27.7	28.5	43.8	0.60	0.65
CHADS₂	18.8	61.2	20.1	0.58	0.67
Framingham	37.1	46.6	16.4	0.62	0.69
7th ACCP	11.7	7.9	80.4	0.56	0.60

Subgroup of 5,588 patients not on warfarin at baseline and with continuous follow-up off of warfarin for at least 12 months.

Abbreviations as in Table 1.