INS and diabetes mellitus: Although ABI was significantly correlated to diabetes duration (r = 0.450), insulin dose (r = 0.318), cholesterol (r = 0.336), LDL (r = 0.441) and negatively correlated to HDL (r = − 0.280) among the studied children with T1DM, it was not correlated to HbA1C (r = 0.129), Table 2.