Factors associated with diabetic foot ulcers and lower limb amputations in type 1 and type 2 diabetes supported by real-world data from the German/Austrian DPV registry.

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.

Immune-checkpoint inhibitor-associated diabetes compared to other diabetes types - A prospective, matched control study.

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/m2 ) compared with T2DM patients (29.8 [26.2-34.3] kg/m2 , 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.

Comparative Characteristics of Patients with Type 2 Diabetes Mellitus Treated by Bariatric Surgery Versus Medical Treatment: a Multicentre Analysis of 277,862 Patients from the German/Austrian DPV Database.

INTRODUCTION: 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. MATERIALS AND METHODS: In the DPV-registry, patients with T2DM from Germany and Austria treated by bariatric surgery were compared to non-surgery controls by descriptive statistics and regression analysis. RESULTS: Among 277,862 patients with T2DM, 0.07% underwent bariatric surgery. Surgery patients were predominantly female [61.20%], younger [median age (Q1;Q3) 54.74(47.40;61.61) vs. 70.04 (60.36;77.58) years] and had a longer diabetes duration [11.21 (7.15;17.93) vs. 8.36 (2.94;14.91) years]. They had a higher BMI [40.02 vs. 30.61 kg/m2, adjusted p < 0.0001] and a slightly lower HbA1c [7.25 vs. 7.56%, adjusted p < 0.05]. There was a trend using more often insulin therapy (52.79 vs.50.08%, n.s.) with no difference in insulin dose/kg × day [0.56 vs. 0.58, n.s.]. Sleeve gastrectomy was performed most frequently, followed by Roux-en-Y gastric bypass, gastric banding, gastric balloon and others. A 2-year follow-up data in 29 patients demonstrated significant reductions in BMI [45.23 to 38.00 kg/m2, p < 0.005] and HbA1c [7.98 to 6.98%, p < 0.005], and a trend for reduced insulin requirements [62.07 vs. 44.83%, n.s.]. CONCLUSION: Despite favourable 2-year outcomes, bariatric surgery is still used rarely in patients with T2DM and obesity. BMI rather than metabolic control seems to represent the major selector for or against bariatric surgery in T2DM.