Results
Patient Demographics
A total of 25,710 patients with AF were analyzed;58% of the patients were male. The mean age of patients was 71.6 years (74.3 for female patients and 69.7 for male patients). Using the CHADS system, the proportions ofpatients at low, moderate, and high risk for stroke wereestimated to be 17%, 28%, and 54%, respectively. Using
the CHADS-VASc system, the proportions of patientsat low, moderate, and high risk for stroke were estimated
to be 7%, 12%, and 81%, respectively (Table 2).