GSTM1 and atrial fibrillation: The univariate analysis revealed statistical differences in 8 variables in demographics (age, gender, AF, smoking, alcohol habit, hypertension, diabetes mellitus, and PH), 12 variables in laboratory parameters (NT-pro BNP, lymphocyte count, basophil count, NLR, Hb, AST/ALT ratio, BUN, Cr, UA, triglycerides, Apo A1 and Lpa), and 11 variables in echocardiographic results (LAD, LVDd, LVDs, LVPWD, IVSD, FS, LVEF, Peak A velocity, Peak E' velocity, Peak A' velocity, and E/E' ratio).