Background—The objective of this study was to evaluate the added predictive ability of the CHA2DS2VASc prediction rule for stroke and death in a nonanticoagulated population of patients with atrial fibrillation. Methods and Results—We included 1603 nonanticoagulated patients with incident atrial fibrillation from a Danish prospective cohort study of 57 053 middle-aged men and women. The Net Rec...
