Glycated hemoglobin at diagnosis of type 1 diabetes and at follow-up in children and adolescents during the COVID-19 pandemic in Germany.

BACKGROUND: This study investigated the diagnostic delay and the subsequent quality of care during the Covid-19 pandemic among children with new-onset type 1 diabetes. METHODS: We compared the HbA1c levels of 3111 children at diagnosis of type 1 diabetes and of 2825 children at a median follow-up of 4.7 months (interquartile range, 4.1-5.4) together with their daily insulin requirement during the Covid-19 pandemic with the two previous years via multivariable linear regression, using data from the German Diabetes Registry DPV. RESULTS: During the Covid-19 pandemic, HbA1c levels were higher at diagnosis of type 1 diabetes (mean estimated difference, 0.33% [95% confidence interval, 0.23-0.43], p < 0.001), but not at follow-up (mean estimated difference, 0.02% [-0.02-0.07]). Children with diabetes onset during the Covid-19 pandemic had a significantly higher daily insulin requirement after initiation of therapy (mean estimated difference, 0.08 U/kg [0.06-0.10], p < 0.001). Both the increase in HbA1c and daily insulin requirement were evident only after the first wave of the pandemic. CONCLUSIONS: This increase in HbA1c at diagnosis of type 1 diabetes during the Covid-19 pandemic may indicate a delay in seeking medical care due to the pandemic. However, this did not affect short-term glycemic control. The increased insulin requirement at follow-up could suggest a more rapid autoimmune progression during the pandemic.