Patients with esophagitis also tended to be less frequently under treatment with PPI (52.7% vs. 72.4%, p = 0.057) while, surprisingly, they had slightly but significantly higher Hb values vs. patients without esophagitis (median Hb value13.6 g/dl vs 12.9 g/dl, p = 0.008). The gene discussed is GSTM1; the disease is esophagitis.