Type 1 diabetes (T1D) is associated with additional autoimmune and endocrine disorders; however, their prevalences internationally are poorly understood. We analyzed 22,632 patients from the U.S. T1D Exchange (T1DX) registry (median age 18 years) and 38,470 patients from the German/Austrian DPV registry (median age 16 years) with T1D duration ≥1 year (median duration 10 and 6 years, respectively) with data between 01/2016 and 03/2018. Reported prevalences of thyroid disease, arthritis, Addison’s disease, and atrophic gastritis were compared using logistic regression models with registry, age group, and sex as covariates. Thyroid disease was more frequent in the T1DX, whereas arthritis was more frequent in the DPV. Prevalence increased with age in both registries. We found no significant differences between T1DX and DPV for Addison’s disease (Figure). Atrophic gastritis was rare in both registries (T1DX: n=3, DPV: n=21). After adjustment for age, thyroid disease was about twice as frequent in females compared with males (T1DX: 25 vs. 13%, DPV: 15 vs. 7%, both p<0.001). Likewise, arthritis was more frequent in females (T1DX: 0.23 vs. 0.16%, p=0.034; DPV: 1.45 vs. 0.88%, p<0.001), whereas Addison’s disease did not differ significantly by sex. Despite different prevalences, patterns of disease frequencies by age and sex were comparable in both registries. However, standardized clinical diagnoses are needed for valid comparisons between countries.
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Disclosure

J. Hermann: None. K. Miller: None. G. Szinnai: None. N.C. Foster: None. T.M. Kapellen: None. L. DiMeglio: Research Support; Self; Amgen Inc., Caladrius Biosciences, Inc., Janssen Research & Development, Medtronic, Sanofi. Other Relationship; Self; Dexcom, Inc. E. Fröhlich-Reiterer: None. J.B. McGill: Advisory Panel; Self; Boehringer Ingelheim Pharmaceuticals, Inc., Gilead Sciences, Inc., Novo Nordisk Inc., Sanofi US. Research Support; Self; Dexcom, Inc., Medtronic, Novartis AG, Sanofi US. Speaker's Bureau; Self; Aegerion Pharmaceuticals, Dexcom, Inc., Janssen Pharmaceuticals, Inc., MannKind Corporation. R.W. Holl: None. D.M. Maahs: Advisory Panel; Self; Novo Nordisk Inc. Consultant; Self; Abbott, Sanofi. Research Support; Self; Dexcom, Inc., Tandem Diabetes Care.

Funding

German Center for Diabetes Research; The Leona M. and Harry B. Helmsley Charitable Trust; German Center for Diabetes Research; German Diabetes Association; European Foundation for the Study of Diabetes; INNODIA

© 2019 by the American Diabetes Association.
2019
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