GAD1 and type 1 diabetes mellitus: Our cohort was negative for islet cell antibodies, this is in contrast to the data from a nearby country where ICA was the most commonly found antibody in 66.2%, followed by anti-GAD (56.3%), IA-2A (40.1%) in 142 subjects with different ages and duration of diabetes.12 Another study from Qatar reported ICA to be positive in 53.4% of T1DM.11