GSTM1 and diabetes mellitus: The possible explanations should be that the 5-year survivors from 2012 were significantly younger at the inclusion in our study (around 55 years), they performed HD using mainly Cimino type shunts (only 6.7% on catheters), had higher Hb levels, lower prevalence of DM, lower prevalence of cardiovascular complications, and higher average LVEF (Table 3).