Figure 2. Figure 2 illustrates the estimated probability data for induction of type I DM by STZ in which logistic model was used. As seen the probabilities of induction of DM first increases up to dose level 40mg/kg and then starts to decreases for higher levels. Therefore, we found that the dose level 40mg/kg with STZ by ip method was the best method to induce DM type É in the current study.