Abstract
Objective This study investigated the onset and the choice of treatment in
children with very early onset of type 1 diabetes mellitus (T1D).
Methods The study included 5,763 patients from the German Diabetes Patient
Follow-up registry with onset of T1D in the first 4 years of life from January
2010 – June 2022. The analysis included diabetes-specific parameters,
anthropometric data, and mode of treatment at onset, within the first and second
year of T1D. Three groups were compared according to age at onset (G1: 223
patients 6–<12 months, G2: 1519 patients 12–<24 months, G3: 4001 patients
24–48 months).
Results In 12.3% of all cases in childhood and adolescence, the incidence
of diabetes in the first 4 years of life was rare. At the onset, clinical status
was worse and diabetic ketoacidosis (DKA) rates were higher in G1 and G2 (52.3%
and 46.5%, respectively) compared to G3 (27.3% (p<0.001)). G1 and G2 were
significantly more likely to be treated with insulin pump therapy (CSII) 2 years
after onset (98.1% and 94.1%, respectively)) compared to G3 (85.8%, p<0.001).
Median HbA1c after 2 years did not differ between groups (G1: 7.27%
(56.0 mmol/mol), G2: 7.34% (56.7 mmol/mol) and G3: 7.27% (56.0 mmol/mol)) or
when comparing CSII vs MDI. The rate of severe hypoglycemia (SH) and DKA during
the first 2 years of treatment did not differ among the three groups, ranging
from 1.83–2.63/100 patient-years (PY) for DKA and 9.37–24.2/100 PY for SH.
Children with T1D under 4 years of age are more likely to be diagnosed with
celiac disease but less likely to have thyroiditis than older children with
T1DM.
Conclusions Young children with T1D had high rates of DKA at onset and
were predominantly treated with insulin pump therapy during the first 2 years.
The median HbA1c for all three groups was<7.5% (58 mmol/mol) without
increased risk of SH or DKA. The use of continuous glucose monitoring (CGM) was
not associated with lower HbA1c in children under 48 months.
Keywords diabetes - autoimmunity - thyroiditis - autoimmunity - antibodies - autoimmunity