Table 5.

Improvement in Reclassification of 1-Year Stroke Risk in the Atherosclerosis Risk in Communities (ARIC) study.

CHA₂DS₂VASc^‡	P₂-CHA₂DS₂VASc^§					CHA₂DS₂VASc^‡	P₂-CHA₂DS₂VASc^§
		<1%	1-2%	>2%	Total			<1%	1-2%	>2%	Total
	<1%	19	3^*	0^*	22		<1%	290	22^†	0^†	312
	1-2%	3^†	9	4^*	16		1-2%	167^*	686	94^†	947
	>2%	0^†	0^†	9	9		>2%	0^*	290^*	633	923
	Total	22	12	13	47		Total	457	998	727	2182

	Participants with stroke in 1 year						Participants without stroke in 1 year

Favorable reclassification

^†

Unfavorable reclassification

^‡

age (1 point for >65, 2 points for >75), sex (1 point for female), Heart Failure (1 point), hypertension (1 point), diabetes (1 point), previous myocardial infarction/peripheral artery disease (1 point), prevalent stroke/transient ischemic attack (2 points)

^§

CHA₂DS₂VASc + abnormal P-wave axis (2 points)

Abbreviations: Category-based Net Reclassification Index (NRI), Relative Integrative Discrimination Improvement (IDI), TIA (transient ischemic attack)