ALB and Stroke: Correlation between RDW and serum albumin, atrial fibrillation, stroke history, serum iron, and beta-blocker usage was significant but marginal (r = -0.282, P = 0.038; r = 0.208, P = 0.038; r = 0.227, P = 0.023, r = -0.240, P = 0.016, respectively).