Table 3.

(Source Wolf PA, Abbott RD, Kannel WB. Atrial fibrillation: a major contributor to stroke in the elderly. The Framingham Study. Archives of internal medicine. Sep 1987;147(9):1561–1564, Table 4, page 1563).

Percent of strokes attributed to non-rheumatic chronic atrial fibrillation, coronary heart disease and cardiac failure, men and women combined.

	Attribution of Strokes, %
Age Group, y	Coronary Heart Disease	Cardiac Failure	Nonrheumatic Chronic Atrial Fibrillation†
			Unadjusted	Adjusted
50–59	19.5 (9.9, 29.1)	9.4 (3.1, 15.7)	6.2 (0.9, 11.5)	…‡
60–69	17.2 (9.3, 25.3)	9.1 (4.2, 14.0)	6.4 (2.1, 10.7)	7.3 (2.8, 11.8)
70–79	19.5 (9.9, 29.1)	13.9 (7.6, 20.2)	17.4 (10.5, 24.3)	16.5 (9.8, 23.2)
80–89	10.6 (0.0, 29.5)	11.1 (0.0, 23.1)	28.9 (14.0, 43.8)	30.8 (15.1, 46.5)

^*Thirty-year follow-up, the Framingham study.

^†Significant increase with age before and later adjusting for systolic blood pressure (P<.05). Numbers in parentheses indicate 95% confidence limits.

^‡Insufficient data.