GSTM1 and metabolic syndrome: The incidence of Hb loss ≥ 1 g/dL was higher in patients with dyslipidemia (odds ratio [OR] 1.95, 95% confidence interval [CI] 1.02–3.77, p = 0.047), abnormal APTT (OR 3.93, 95% CI 1.71–9.03, p = 0.001), urinary protein ≥ 3 g/gCr (OR 2.61, 95% CI 1.38–4.94, p = 0.003), and a high urinary NAG/Cr (OR 4.69, 95% CI 2.27–9.70, p < 0.0001; Table 3) than in others.