The risk of a child developing type 1 diabetes is about 10% if the father has it, about 10% if a sibling has it, about 4% if the mother has type 1 diabetes and was aged 25 or younger when the child was born, and about 1% if the mother was over 25 years old when the child was born.
Med njimi so DRB1 0401, DRB1 0402, DRB1 0405, DQA 0301, DQB1 0302 in DQB1 0201, ki so pogostne pri prebivalcih Severne Amerike in pri Evropejcih.