GSTM1 and atrial fibrillation: Then, 19 variables were selected as candidate predictors, including age, gender, AF, smoking, alcohol habit, hypertension, diabetes mellitus, PH, lymphocyte count, basophil count, NLR, Hb, AST/ALT ratio, BUN, Cr, UA, triglycerides, Apo A1, and Lpa.