In contrast to the diagnostic markers (anti-GAD/anti-islet), anti-tissue and anti-TPO were evaluated to characterize comorbid autoimmunity associated with T1DM Analyses are shown for All (entire tested cohort) and Total (confirmed T1DM and T2DM), stratified by sex and age group (<13, 13–19, 20–35, >35 years), as shown in Figure 5A,B. Here, GAD1 is linked to type 2 diabetes mellitus.