The increase in risk was restricted to ischemic strokes ( odds ratioIVvsI quartile , 2.13 ; 95 % confidence interval , 1.10-4 .12 ; fully adjusted model ) , whereas high levels of TF were not associated with the risk of hemorrhagic stroke ( odds ratioIVvsI quartile , 1.12 ; 95 % confidence interval , 0.49-2 .55 ; fully adjusted model ) .