GDF15 and coronary artery disorder: According to previous researches, patients were divided into three groups: < 1200, 1200–1800, and > 1800 ng/L [12, 15], our research also divided our patients into three groups according to the GDF-15 levels, however, our result revealed that only GDF-15 values > 1800 ng/L were significantly associated with the incidence of MACEs in CAD patients.