GSTM1 and acute kidney injury: Out of this, 90% [27/30; mean ± SD = 6.9±1.08 U/gm Hb] were in no AKI category, 6.67% [2/30, 7.6 & 7.8 U/gm Hb] in mild AKI category and 3.33% [1/30, 7.8 U/gm Hb] were in severe AKI category.