AUTHOR=Farakla Ioanna , Lagousi Theano , Miligkos Michael , Nicolaides Nicolas C. , Vasilakis Ioannis-Anargyros , Mpinou Maria , Dolianiti Maria , Katechaki Elina , Taliou Anilia , Spoulou Vasiliki , Kanaka-Gantenbein Christina TITLE=Stress hyperglycemia, Diabetes mellitus and COVID-19 infection: The impact on newly diagnosed type 1 diabetes JOURNAL=Frontiers in Clinical Diabetes and Healthcare VOLUME=Volume 3 - 2022 YEAR=2022 URL=https://www.frontiersin.org/journals/clinical-diabetes-and-healthcare/articles/10.3389/fcdhc.2022.818945 DOI=10.3389/fcdhc.2022.818945 ISSN=2673-6616 ABSTRACT= Several recent studies have documented an increased incidence of newly diagnosed type 1 Diabetes (T1D) cases in children and adolescents during the COVID-19 pandemic and a more severe presentation at diabetes onset. In this descriptive study, we present the experience of the Diabetes Centre of the Division of Endocrinology, Diabetes, and Metabolism of the First Department of Pediatrics of the National and Kapodistrian University of Athens Medical School at “Aghia Sophia” Children’s Hospital in Athens, Greece, concerning newly diagnosed cases of T1D during the COVID-19 pandemic in the period ranging from March 2020 to December 2021. Patients who had already been diagnosed with T1D and needed hospitalization due to poor glycemic control during the pandemic have been excluded from the analysis. Eighty- three children and adolescents with a mean age of 8,5 ± 4.02 years were admitted to the hospital due to newly diagnosed T1D during this 22 months’ period in comparison to 34 new cases in the previous year. All newly diagnosed patients during the pandemic presented in their majority with DKA (Blood pH: 7.2) representing an increase of new moderate/severe cases in comparison to previous years (pH 7.2 versus 7.3 in the previous year, p value: 0.021). 49 cases presented with DKA, of which 24 were characterized moderate and 14 severe DKA (28.9% and 16,9%, respectively), while 5 patients, needed to be admitted to the ICU to recover from the severe ketoacidosis. Whether a previous COVID- 19 infection could have been the triggering factor is not supported by the SARS-Cov2 specific antibodies analysis in our cohort of patients. As far as HbA1c is concerned, there was no statistically significant difference between the pre-COVID-19 year and the 22-months’ period of the pandemic (11.6% versus 11.9%, p- value: 0.461). Triglycerides values were significantly higher in patients with new onset T1D during the COVID-19 years compared to those before the pandemic (p value= 0.032). Additionally, there is a statistically significant correlation between blood pH and Triglycerides for the whole period 2020-2021 (p-value<0.001), while this correlation was not significant for the year 2019. More large-scale studies are required to confirm these observations.