Table-II show Pearson correlation between PON1 concentration with HDL, LDL, apo A1, and apo B. PON1 was negatively correlated with LDL in both types of patients: T1DM (r = -0.5733, P < 0.01), T2DM (r = -0.4639, P < 0.05). Here, PON1 is linked to type 1 diabetes mellitus.