. Author manuscript; available in PMC: 2016 Jun 20.

Published in final edited form as: J Thromb Haemost. 2014 Apr;12(4):564–570. doi: 10.1111/jth.12507

Table 4.

Risk of Stroke for different ABO Blood Types in REGARDS

	Blood Type (Hazard Ratio, 95% CI)
	A	B	AB	O
Model 1^*	1.22 (0.94, 1.57)	1.25 (0.87, 1.81)	1.80 (1.04, 3.12)	Reference
Model 2^†	1.15 (0.87, 1.53)	1.27 (0.87, 1.87)	1.83 (1.01, 3.30)	Reference

Model 1: Age, sex, race, region, age by race interaction term

^†

Model 2: Model 1 plus systolic blood pressure, taking antihypertensive medications, diabetes, current smoking, cardiovascular disease, atrial fibrillation, and left ventricular hypertrophy (Framingham Stroke Risk Factors)