GSTM1 and type 1 diabetes mellitus: The pooled SMD in RBC parameters in T2DM were as follows: RBC: -0.57 (10<sup>6</sup>/μL), Hb: -0.73 g/dL and HCT: -1.22%, Where as in T1DM RBC, Hb and HCT were -1.23 (10<sup>6</sup>/μL), -0.80 g/dL and -0.29%, respectively.<h4>Conclusion</h4>Patients with T2DM had significantly increased TLC counts, absolute neutrophil, basophil, lymphocyte, monocyte counts and relative counts of neutrophils and basophils in comparison to controls.