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Objective: The β‐cell stress hypothesis suggests that increased insulin demand contributes to the development of type 1 diabetes. In the TRIGR trial we set out to assess the profile of plasma glucose and HbA1c before the diagnosis of clinical diabetes compared to nondiabetic children. Research Design and Methods: A cohort of children (N = 2159) with an affected first‐degree relative and increased HLA risk were recruited 2002–2007 and followed until 2017. To study the relationship between plasma glucose/HbA1c and the development of autoantibodies or clinical disease Kaplan‐Meir curves were developed. Mixed models were constructed for plasma glucose and HbA1c separately. Results: A family history of type 2 diabetes was related to an increase in plasma glucose (p < 0.001). An increase in glucose from the previous sample predicted clinical diabetes (p < 0.001) but not autoantibodies. An increase of HbA1c of 20% or 30% from the previous sample predicted the development of any autoantibody (p < 0.003 resp <0.001) and the development of diabetes (p < 0.002 resp <0.001. Participants without autoantibodies had lower HbA1c (mean 5.18%, STD 0.24; mean 33.08 mmol/mol, STD 2.85) than those who progressed to clinical disease (5.31%, 0.42; 34.46 mmol/mol, 4.68; p < 0.001) but higher than those who developed any autoantibody (5.10%, 0.30; 32.21 mmol/mol, 3.49; p < 0.001), or multiple autoantibodies (5.11%, 0.35; 32.26 mmol/mol, 3.92; p < 0.003). Conclusions: A pronounced increase in plasma glucose and HbA1c precedes development of clinical diabetes, while the association between plasma glucose or HbA1c and development of autoantibodies is complex. Increased insulin demand may contribute to development of type 1 diabetes. [ABSTRACT FROM AUTHOR]

Objectives: Children with type 1 diabetes (T1D) are not included in guidelines regarding diagnosis criteria for celiac disease (CD) without a diagnostic biopsy, due to lack of data. We explored whether tissue transglutaminase antibodies (anti‐tTG) that were ≥ 10 times the upper limit of normal (10× ULN) predicted CD in T1D. Methods: Data from the Swedish prospective Better Diabetes Diagnosis study was used, and 2035 children and adolescents with T1D diagnosed between 2005–2010 were included. Of these, 32 had been diagnosed with CD before T1D. The children without CD were repeatedly screened for CD using anti‐tTG antibodies of immunoglobulin type A. In addition, their human leukocyte antigen (HLA) were genotyped. All children with positive anti‐tTG were advised to undergo biopsy. Biopsies were performed on 119 children and graded using the Marsh‐Oberhüber classification. Results: All of the 60 children with anti‐tTG ≥10x ULN had CD verified by biopsies. The degree of mucosal damage correlated with anti‐tTG levels. Among 2003 screened children, 6.9% had positive anti‐tTG and 5.6% were confirmed CD. The overall CD prevalence, when including the 32 children with CD before T1D, was 7.0% (145/2035). All but one of the children diagnosed with CD had HLA‐DQ2 and/or DQ8. Conclusions: As all screened children and adolescents with T1D with tissue transglutaminase antibodies above 10 times the positive value 10x ULN had CD, we propose that the guidelines for diagnosing CD in screened children, when biopsies can be omitted, should also apply to children and adolescents with T1D as a noninvasive method. [ABSTRACT FROM AUTHOR]

Background Sweden has the second highest incidence of type 1 diabetes in the world. Nutritional aspects in utero and in infancy affect the development. We conducted a survey to determine whether reported maternal use of vitamin D-containing micronutrient supplements during pregnancy was associated with the risk of developing type 1 diabetes in the child. Methods This report was based on data from the ABIS (All Babies In Southeast Sweden) study, with questionnaire data on 16 339 mother and infant pairs at birth and at 1-yr of age (n = 10 879), of whom 108 children were registered with type 1 diabetes before 14-16 yr of age. The questions 'during pregnancy, did you take any vitamin/mineral supplements?' and 'if yes, which? (open answer)' in addition to other lifestyle questions were answered. Logistic regression was performed with onset of type 1 diabetes as the dependent variable and vitamin D supplementation use as the independent variable, adjusted for relevant factors. Results Vitamin D supplementation during pregnancy was consumed by 9.3% of mothers whose children later got type1 diabetes and among 11.3% of those mothers whose children did not get type 1 diabetes (p = 0.532). No significant association was found between reported supplement intake of vitamin D during pregnancy and risk of type 1 diabetes, even when adjusting for factors which could influence the association. Conclusion Maternal use of vitamin D-containing multivitamin supplements during pregnancy was not related to the risk of developing type 1 diabetes in children before 14-16 yr of age in Southeast of Sweden. [ABSTRACT FROM AUTHOR]