Figure 1.

Incremental predictive value of the established risk factors, hemoglobin (Hb), and red cell distribution width (RDW) levels by Cox proportional hazards model. The RDW levels have predictive value incremental to the combination of hemoglobin and established risk factors including sex, age, body mass index, prior coronary heart disease, hypertension, diabetes mellitus, serum creatinine, total cholesterol, percutaneous coronary intervention, antiplatelet agents, β‐blockers, and angiotensin‐converting enzyme inhibitors/angiotensin II type 1 receptor blockers.