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Rates of ischemic stroke, with 95% CIs, in patients with prevalent atrial fibrillation based on age: (A) 65 to 74 years, (B) 75 to 84 years, (C) ≥85 years. CI values of the percentages using warfarin are not displayed in the figures to maintain readability; however, the SEEs were <0.5% for every estimate.
