Using logistic regression, we found that age, gender, body weight, systolic and diastolic blood pressure, NYHA class, the presence of oedema, LVEF, the presence of anaemia, haemoglobin, the presence of ID, serum ferritin, transferrin saturation (TSAT), serum creatinine, a history of chronic kidney disease, and a history of anaemia all predicted lower exercise capacity (all p < 0.05, Table 2). This evidence concerns the gene TF and anemia.