Abstract
OBJECTIVETo investigate diabetes-specific autoantibodies and additional autoimmune phenomena in a large cohort of young patients with type 1 diabetes.RESEARCH DESIGN AND METHODSData from 28,671 patients <30 years with type 1 diabetes from 242 specialized centers in Germany and Austria were analyzed.RESULTSAt least one β-cell antibody was present in 81.6% of patients. β-cell–Ab-negative patients were significantly younger at diabetes onset (P < 0.0001). A total of 19.6% had positive thyroid antibodies with female predominance (62%, P < 0.0001). Antibodies to tissue transglutaminase were present in 10.7%, with a significantly longer duration of diabetes (P < 0.0001). Parietal cell antibodies were found in 283 patients, associated with older age (P < 0.001), and adrenal antibodies were present in 94 patients. In 575 patients, at least three different autoimmune phenomena were present.CONCLUSIONSThyroid autoimmunity and antibodies suggestive for celiac disease are the most prevalent additional immune phenomena in type 1 diabetes. Parietal/adrenal antibodies are rare.
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