GSTM1 and anemia (phenotype): Of the 303 participants, 168 (55.5%) had anaemia, of these 79/168 (47.1%) had mild anaemia (Hb 10.0 - 10.9mg/dl) 87/168 (51.7%) had moderate anaemia (Hb 7.0 - 9.9mg/dl) and 2/168 (1.2%) had severe anaemia (Hb Less than 7mg/dl).