Although the adjusted model incorporating numerous HF specific parameters including NYHA class was better than the Hb/RDW ratio (AUC = 0.777, p < 0.0001), the Hb/RDW ratio had a good predictive value on its own (AUC = 0.683, p < 0.0001); Figure 4. Here, GSTM1 is linked to hydrops fetalis.