The majority of the adolescent girls were diagnosed with anaemia (87%), and of these, 17% had mild anaemia (Hb: 11.0 to 11.9 g dl), 65% had moderate anaemia (Hb: 8.0 to 10.9 g dl), and 5% had severe anaemia (Hb: ≤7.9 g dl). The gene discussed is GSTM1; the disease is anemia (phenotype).