GSTM1 and anemia (phenotype): The increases relative to 2015–16 were seen in mild (Hb 10.0–10.9 g/dL), moderate (Hb 7.0–9.9 g/dL) and severe anaemia (Hb < 7.0 g/dL), although the prevalence of severe and moderate anaemia remained lower that the values reported in NFHS-2 (1998–99) [13].