Calculation of CHADS2, R2CHADS2, and CHA2DS2-VASc score

CHADS₂ score was calculated for each patient based on a scoring system in which 2 points were assigned for a history of stroke or transient ischemic attack and 1 point was assigned for age ≥75 years, the presence of hypertension, diabetes mellitus, and congestive heart failure ^11,12. R₂CHADS₂ score was calculated for each patient based on a point system in which 2 points were assigned for renal dysfunction implicated by estimated glomerular filtration rate < 60 ml/min/1.73 m² and a history of stroke, and 1 point was assigned for age ≥75 years, the presence of congestive heart failure, hypertension, and diabetes ¹⁶. CHA₂DS₂-VASc score was calculated for each patient based on a point system in which 2 points were assigned for age ≥75 years and a history of stroke, and 1 point was assigned for congestive heart failure, hypertension, age between 65 and 74 years, diabetes mellitus, female sex, and vascular disease ¹³.