Table 1 summarizes patient characteristics. Patients with hypoalbuminemia were older (median 78.8 yr) than patients with normal serum albumin (72.4 yr, p < 0.001). There was no gender difference between the hypoalbuminemia and the control groups. Patients with hypoalbuminemia had significantly lower Hb level (median 109 vs. 128 g/L, p < 0.001), and higher serum creatinine level (136.1 vs. 93.7 μmol/L, p < 0.001) than the controls. The median Charlson Comorbidity Index (CCI), of patients with hypoalbuminemia was higher (median 5) than that of the controls (4, p < 0.001). Here, GSTM1 is linked to Hypoalbuminemia.