OBJECTIVE:To obtain clinical features of diabetic ketoacidosis (DKA) in adults leading to hospital admission. METHODS:Multicenter observational study investigating DKAs treated in five German tertiary hospitals between 2022 and 2023. RESULTS:A total of 179 patients with 203 episodes of DKA were registered: 64% of cases in pre-existing type 1 diabetes mellitus (T1DM), 14% in new-onset T1DM, 14% in pre-existing type 2 diabetes mellitus (T2DM), 3% in new-onset T2DM, 6% in latent autoimmune diabetes in adults, and 6% in pancreatogenic diabetes. Seven cases of SGLT 2 inhibitor (SGLT 2-I)-associated euglycemic DKA (EDKA) were encountered. In pre-existing T1DM, DKA occurred despite continuous glucose monitoring in 51% of patients and insulin pumps or automated insulin delivery in 24%. Only 21% of individuals with T1DM were in possession of ketone test and only 6% applied ketone testing. In total, 71% of patients with pre-existing T1DM experienced recurrent episodes of DKA. Suboptimal adherence to diabetes therapy was the most common triggering factor for DKA in known T1DM (56%), whereas infections contributed most in pre-existing T2DM (32%). The entirety of patients pretreated with SGLT2-Is and particularly also those with SGLT2-I associated EDKA were not educated concerning sick-day-rules. The inpatient mortality risk of DKA was 2.3% and restricted to multimorbid patients with known T2DM. CONCLUSIONS:The clinical and etiological pattern of DKA is heterogeneous. Patients with pre-existing T1DM showed educational deficits concerning diagnostic and therapeutic measures to prevent DKA. Individuals with recurrent episodes of DKA require individual therapeutic concepts within the multidisciplinary diabetes care team. Emphasizing sick-day-rules in patients being treated with SGLT 2-Is is indispensable to prevent EDKA. Individuals with pre-existing T2DM represent a vulnerable group with severe comorbidities and high mortality risk due to DKA.

Aims: Diabetic foot ulcer (DFU) is a leading cause of lower limb amputations in people with diabetes. This study was aimed to retrospectively analyze factors affecting DFU using real-world data from a large, prospective central-European diabetes registry (DPV [Diabetes-Patienten-Verlaufsdokumentation]). Materials and Methods: We matched adults with type 1 (T1D) or type 2 diabetes (T2D) and DFU to controls without DFU by diabetes type, age, sex, diabetes duration, and treatment year to compare possible risk factors. Cox regression was used to calculate hazard ratios for amputation among those with DFU. Results: In our cohort (N = 63 464), male sex, taller height, and diabetes complications such as neuropathy, peripheral artery disease, nephropathy, and retinopathy were associated with DFU (all p < .001). Glycated hemoglobin (HbA1c) was related to DFU only in T1D (mean with 95% confidence interval [CI]: 7.8 [6.9-9.0] % vs 7.5 [6.8-8.5] %, p < .001). High triglycerides and worse low-density lipoprotein/high-density lipoprotein ratio were also associated with DFU in T1D, whereas smoking (14.7% vs 13.1%) and alcohol abuse (6.4% vs 3.8%, both p < .001) were associated with DFU in T2D. Male sex, higher Wagner grades, and high HbA1c in both diabetes types and insulin use in T2D were associated with increased hazard ratios for amputations. Conclusions: Sex, body height, and diabetes complications were associated DFU risk in adults with T1D and T2D. Improvement in glycemic control and lipid levels in T1D and reduction of smoking and drinking in T2D may be appropriate interventions to reduce the risk for DFU or amputations.

Fragestellung: Bariatrische Chirurgie (BC) ist eine etablierte Therapieoption für Menschen mit Typ-2-Diabetes (T2D) mit einem BMI ≥ 35 kg/m2 und zeigt im Vergleich zur konservativen Therapie häufiger eine Remission des T2D, sowie nachhaltigen Gewichtsverlust. Auch bei Menschen mit Typ-1-Diabetes (T1D) nimmt die Prävalenz von Adipositas und Parametern des metabolischen Syndroms zu. Die Rolle der BC bei T1D ist jedoch unzureichend charakterisiert. Ziel dieser Analyse ist es, die derzeitige Praxis und die Auswirkungen verschiedener bariatrischer Verfahren auf die diabetische Stoffwechsellage, das Gewicht und die kardiovaskulären Risikofaktoren bei adipösen Personen mit T1D und T2D zu untersuchen.

Hintergrund Das Diabetische Fußsyndrom ist die häufigste Ursache für Amputationen oberhalb des Sprunggelenks in Deutschland. Nach wie vor sterben mehr als die Hälfte der Patienten mit einer Major-Amputation innerhalb von 5 Jahren.

Background To describe checkpoint inhibitor-induced diabetes mellitus (CPI-DM) and to compare with regular type 1 (T1DM), type 2 (T2DM), and medication-induced diabetes mellitus (MI-DM). Methods We included 88 177 adult patients from the Diabetes Patient Follow-Up (DPV) registry with diabetes manifestation between 2011 and 2020. Inclusion criteria were T1DM, T2DM, MI-DM, or CPI-DM. Because of the heterogeneity between the groups, we matched patients by age, sex, and diabetes duration using propensity scores. Patient data were aggregated in the respective first documented treatment year. Results The matched cohort consisted of 24 164 patients; T1DM: 29, T2DM: 24000, MI-DM: 120, CPI-DM: 15 patients. Median age at manifestation of CPI-DM patients was 63.6 (57.2-72.8) years (53.3% male). Body mass index in CPI-DM patients was significantly lower (26.8 [23.9-28.1] kg/m(2)) compared with T2DM patients (29.8 [26.2-34.3] kg/m(2), P = 0.02). At manifestation, HbA1c was significantly higher in CPI-DM compared with MI-DM, but there was no difference during follow-up. Diabetic ketoacidosis (DKA) was documented in six CPI-DM patients (T1DM: 0%, T2DM: 0.4%, MI-DM: 0.0%). Fourteen CPI-DM patients were treated with insulin, and three received additional oral antidiabetics. The most common therapy in T2DM was lifestyle modification (38.8%), insulin in MI-DM (52.5%). Concomitant autoimmune thyroid disease was present in four CPI-DM patients (T1DM: 0.0%, T2DM: 1.0%, MI-DM: 0.8%). Conclusions The data from this controlled study show that CPI-DM is characterized by a high prevalence of DKA, autoimmune comorbidity, and metabolic decompensation at onset. Structured diagnostic monitoring is warranted to prevent DKA and other acute endocrine complications in CPI-treated patients.

•Fracture risk among adults with T2D is associated with low HbA1c.•SGLT2-use, especially in women, is related to bone fractures in T2D.•The relation of BMI to fracture risk varies between fracture sites.

AIMS:The diabetic foot syndrome (DFS) is a serious complication in patients with diabetes increasing the risk for minor/major amputations. This analysis aimed to examine differences in diabetes patients with or without DFS stratified by type 1 (T1D) or type 2 diabetes (T2D).MATERIAL AND METHODS:Adult patients (≥20y of age) with diabetes from the German/Austrian diabetes patients follow-up registry (DPV) were included. The cross-sectional study comprised 45 722 subjects with T1D (nDFS  = 2966) and 313 264 with T2D (nDFS  = 30 904). In DFS, minor/major amputations were analysed. To compare HbA1C , neuropathy, nephropathy, cardiovascular disease risk factors, and macrovascular complications between patients with or without DFS, regression models were conducted. Confounders: age, sex, diabetes duration.RESULTS:In patients with DFS, a minor amputation was documented in 27.2% (T1D) and 25.9% (T2D), a major amputation in 10.2% (T1D) and 11.3% (T2D). Regression models revealed that neuropathy was more frequent in subjects with DFS compared with patients without DFS (T1D: 70.7 vs 29.8%; T2D: 59.4% vs 36.9%; both P < 0.0001). Hypertension, nephropathy, peripheral vascular disease, stroke, or myocardial infarction was more common compared with patients without DFS (all P < 0.0001). In T1D with DFS, a slightly higher HbA1C (8.11% vs 7.95%; P < 0.0001) and in T2D with DFS a lower HbA1C (7.49% vs 7.69%; P < 0.0001) was observed.CONCLUSIONS:One third of the patients with DFS had an amputation of the lower extremity. Especially neuropathy or peripheral vascular disease was more prevalent in patients with DFS. New concepts to prevent DFS-induced amputations and to reduce cardiovascular risk factors before the occurrence of DFS are necessary.

Bariatric surgery is a well-established treatment option for serious obesity and concomitant type 2 diabetes mellitus (T2DM). In this analysis, we investigated predictors for bariatric surgery in everyday clinical practice.