Compared to CKD patients with normal Hb levels, those with SCT showed on average higher uric acid levels (560 ± 159 vs 413 ± 153 mmol/l; p = 0.001) and lower Hb levels (9 ± 1.80 vs 10 ± 2.20 g/dl; p = 0.001). The gene discussed is GSTM1; the disease is chronic kidney disease.