GSTM1 and anemia (phenotype): Anemia (Hb < 11 g/100 ml): 9.1% (–7.9–26.1%)Sideropen anemia (Hb < 11 g/100 ml+ s-Ferritin <15 μg/L): 10.8% (–0.4–22.0%)Empty iron deposits (ferritin < 10 μg/L): 13.5% (1.0–26.1%)Severely low iron deposits (ferritin < 15 μg/L): 17.3% (–5.8 –40.4%)