Association between glycaemic outcome and BMI in Danish children with type 1 diabetes in 2000-2018: a nationwide
E H Ibfelt1, D Vistisen1, P Falberg Rønn1
1Steno Diabetes Centre Copenhagen, Gentofte, Denmark.
Insights
This study analyzed HbA1c and BMI trends in Danish children with type 1 diabetes. A non-linear association was found between HbA1c and BMI z-score, influenced by gender, age, and diabetes duration.
Area of Science:
- Pediatrics
- Endocrinology
- Diabetes Research
Background:
- Type 1 diabetes (T1D) management requires monitoring glycemic control (HbA1c) and body mass index (BMI).
- Understanding the interplay between HbA1c and BMI in pediatric T1D is crucial for long-term health outcomes.
- The DanDiabKids registry provides a comprehensive dataset for longitudinal analysis in this population.
Observation:
- Analysis of 6097 children with T1D from 2000-2018 in Denmark.
- Median HbA1c was 65 mmol/mol (8.1%) and median BMI z-score was 0.85 in girls and 0.67 in boys.
- BMI z-scores exhibited a non-linear relationship with HbA1c levels.
Findings:
- The highest BMI z-scores were observed at intermediate HbA1c levels (approximately 60-70 mmol/mol).
- This association was significantly modified by gender, age, and diabetes duration.
- Severe hypoglycemia and insulin pump therapy showed a minor positive association with BMI z-score.
Implications:
- Clinical management of pediatric T1D should consider the complex, non-linear relationship between glycemic control and BMI.
- Individualized treatment strategies may be necessary, accounting for patient demographics and disease characteristics.
- Further research into the mechanisms underlying these associations can inform preventative and therapeutic interventions.
Aim:
To describe the development of HbA1c and BMI over time in Danish children with type 1 diabetes; and to investigate the association between HbA1c and BMI including influence of age, gender, diabetes duration, severe hypoglycaemia and treatment method.
Methods:
We used the nationwide Danish Registry of Childhood and Adolescent Diabetes, DanDiabKids, including annual registrations of all children with diabetes treated at Danish hospitals. With linear mixed-effects models and splines we analyzed the HbA1c and BMI development over time as well as the association between HbA1c and BMI including effects of gender, age, disease duration, hypoglycaemia and treatment method. BMI z-scores were calculated for these analyses.
Results:
For the period from 2000 to 2018, 6097 children with type 1 diabetes were identified from the DanDiabKids database. The median (interquartile range) HbA1c level was 65 (57-74) mmol/mol (8.1%) and the median BMI z-score was 0.85 in girls and 0.67 in boys. A non-linear association was found between HbA1c and BMI z-score, with the highest BMI z-score observed for HbA1c values in the range of approximately 60-70 mmol/mol (7.6-6.8%). The association was modified by gender, age and diabetes duration. Severe hypoglycaemia and insulin pump treatment had a small positive impact on BMI z-score.
Conclusion:
The association between HbA1c and BMI z-score was non-linear, with the highest BMI z-score being observed for intermediate HbA1c levels; however, specific patterns depended on gender, age and diabetes duration.
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